Owners have filed 928 complaints
about the 2015 GMC Sierra 1500 with NHTSA between 2015 and 2026.
The largest single group is the brakes.
Across this model's run it ranks 3 of 31 worst.
The letter says how bad. This says what kind — whether this year drew
an unusual number of complaints, unusually dangerous
ones, or failures that arrived unusually early.
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 100
Against the median year of the GMC Sierra 1500. 50 means typical for this
model; 100 means roughly double.
Severity — 30
5.8% of these complaints
involved a crash, fire, injury or death, against a national rate of
9.7%.
Early failure — 62
37% of failures with a mileage on record happened under
36,000 miles, against a national rate of
29%.
How 2015 compares with every other GMC Sierra 1500
NHTSA files every complaint against a named sub-assembly, not just a
system. This is the difference between knowing it was "the engine" and
knowing which part of it — the list to hand a mechanic.
Body
2657.8%
Defroster/Defogger/Hvac System
48.9%
Headlights
48.9%
AIR Conditioner
36.7%
Automatic Emergency Braking
24.4%
Integrated Trailer Brake Control
24.4%
Vacuum
24.4%
Pedals AND Linkages
24.4%
When it fails
Odometer readings owners gave when they filed. About half of all
complaints include one.
Under 1,000 miles
6110.3%
1,000 – 9,999 miles
518.6%
10,000 – 24,999 miles
457.6%
25,000 – 49,999 miles
15726.6%
50,000 – 74,999 miles
14524.6%
75,000 – 99,999 miles
7813.2%
100,000 – 149,999 miles
416.9%
150,000+ miles
122.0%
When owners complained
A spike years after the car went on sale usually means a part wearing
out on schedule across the whole fleet — the kind of pattern no single
owner can see from inside their own car.
Jan 2015peak 25Aug 2026
NHTSA investigations into the 2015 GMC Sierra 1500
An investigation is the step before a recall: the agency has seen enough
complaints to look into a pattern itself. An open one means it thinks
something may be wrong and nothing has been fixed yet.
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.C...
PE18012Opened 20 Nov 2018Closed 10 Apr 2022SERVICE BRAKES
Brake Vacuum Pump Failure
On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extendi...
Recalls on the 2015 GMC Sierra 1500
A complaint is one owner's allegation. A recall is the point at which
the manufacturer or a regulator agreed the defect is real and dangerous
enough to fix for free — however old the car is.
United States — NHTSA
21V504000
AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
Risk: A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
21V245000
SEAT BELTS:FRONT
General Motors, LLC (GM) is recalling certain 2014-2016 Chevrolet Silverado 1500, 2015-2016 Chevrolet Tahoe, and 2014-2015 GMC Sierra 1500 vehicles that may have received an incorrect replacement tensioner cable assembly as part of a previous recall remedy or a subsequent repair. The flexible steel cable connecting the driver's seat belt to the outboard side of the seat may be repeatedly bent over the seat side shield as the driver enters and exits the vehicle causing the cable to fatigue and separate.
Risk: A broken pretensioner cable reduces the effectiveness of the driver's seat belt, increasing the risk of injury.
20V736000
AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500 and Chevrolet Silverado 1500 and 2015 GMC Sierra 2500 and 3500, and Chevrolet Silverado 2500 and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator.
Risk: If the end cap separates from the inflator, the compressed gas will escape and the end cap can be propelled into the vehicle, increasing the risk of injury or a crash.
19V761000
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Risk: Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
19V645000
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
Risk: As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
18V586000
STEERING:ELECTRIC POWER ASSIST SYSTEM
General Motors LLC (GM) is recalling certain 2015 Chevrolet Silverado 1500, Tahoe and Suburban, GMC Sierra 1500 and Yukon, and Cadillac Escalade vehicles. Electric power steering (EPS) assist may be lost momentarily, followed by a sudden return of EPS assist.
Risk: If EPS assist is lost and then suddenly returns, the driver may have difficulty steering the vehicle, especially at low speeds, increasing the risk of a crash.
17V437000
AIR BAGS:FRONTAL
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
16V651000
AIR BAGS:FRONTAL
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Reports where the owner recorded a crash, a fire, an injury or a death.
at 218,000 milesBerryville, ARCrash
AIR BAGS
The contact owns a 2015 GMC Sierra 1500. While traveling on a two-lane highway at approximately 55 MPH, another vehicle suddenly turned into the contact's lane, resulting in a severe frontal "T-bone" collision. The force of the impact caused the other vehicle to be propelled into a ditch, while the contact's vehicle remained on the roadway. Despite the significant nature of the crash and the speed involved, no air bags deployed. The dealer was notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 218,000.
NHTSA complaint #11728045 — an unverified report by a vehicle owner.
at 124,000 milesApopka, FLFire
ENGINE
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at approximately 45 mph, he observed a popping noise beneath him. The contact stopped the vehicle and observed smoke emanating from the front of the vehicle. The vehicle went into limp mode, lost power, and when the brake was depressed, the vehicle did not slow the vehicle down as intended. The contact stated that as he pulled into a parking lot to inspect the vehicle, he observed flames emanating from the hood. The contact stated that he pressed the hood latch, which did not open the hood, and he then exited the vehicle and observed the hood engulfed in flames. The contact mentioned that a store employee brought a fire extinguisher out and attempted to extinguish the flames. The fire department was called and extinguished the fire fully. There was no police report, but the police did come out to assist. The contact sustained a right-hand injury, but medical attention was not needed. The vehicle was then towed to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 124,000.
NHTSA complaint #11724912 — an unverified report by a vehicle owner.
Shrewsbury, MAFire
ELECTRICAL SYSTEM
I remote started my truck, and when I got to it there was smoke and a flame coming from the rear power window. The remote start activates the rear defrosters, which started the electrical issues. I shut off the engine, and a loud pop followed, which was the shattering of the driver side rear window. The flame went out, and could have easily ignited the tarp covering the truck bed. There were no warnings on the console for the issue, and no recalls available. I have seen similar recall, but in a different state and back in 2022. This leaves me with a shattered window in the back, which is unsafe for visibility, and a bill to pay due to manufacturing errors for a feature in the truck. The rear window is all melted, and the glass is chipping away.
NHTSA complaint #11720409 — an unverified report by a vehicle owner.
Waukesha, WICrash
SERVICE BRAKES
The brake system failed in a parking lot three times within a month. It’s related to the special policy and recall regarding the vacuum and the loss of brakes at slower speeds and in reverse. The first two accidents were very minor creating no damage. The third one was at 10mph when I lost my brakes and crashed into a concrete barrier in a parking structure causing significant damage to my truck. I did not get injured but I have a wife and two kids that I am so grateful were not in the truck for the third one with major damage. With that being said my son was in the truck the second time it happened when I crashed into a parked vehicle in a parking lot because I was unable to stop which made me very frustrated and worried for my families safety in my truck. The first accident was in a parking lot where I was backing up and lost the brakes and crashed into a building which is my veterinary office causing damage to the building. Therefore after the first crash due to this issue I have decided that driving with my family in the truck is not an option anymore. It is very disappointing that a truck I purchased for the functionality and safety of having my wife and kids in it is no longer safe for passengers or myself in it. This problem is very reproducible and is a major concern for my family and my safety. It was towed to a GMC dealership in Waukesha and is being inspected and they have stated it is reproducible. No warning lamps or messages were indicated for this issue. The truck will next need to get towed to Crash Champions auto body repair to ultimately get repaired which will take another month. All of this is a major inconvenience as I am a full time firefighter and in paramedic school as well. Not having a reliable safe vehicle for an extended period of time has caused great stress and inconvenience to my family. I’m hoping and praying that something can be done about this quickly and promptly to make this right. Thank you.
NHTSA complaint #11649900 — an unverified report by a vehicle owner.
at 90,000 milesBowling Green, KYCrash1 injured
AIR BAGS
The contact owned a 2015 GMC Sierra. The contact stated that while driving at an undisclosed speed, another vehicle spontaneously switched lanes onto her lane, causing the contact to swerve out of the way and crash into the median; however, no airbags were deployed. The vehicle was towed to a tow yard. The insurance company deemed the vehicle totaled. The contact injured her neck, back, and several other places, and she received medical attention. A police report was made. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that her vehicle had previously been repaired under an unknown airbag recall. The manufacturer was not made aware of the failure. The failure mileage was approximately 90,000.
NHTSA complaint #11540301 — an unverified report by a vehicle owner.
Wilmimgton, DECrash
AIR BAGS
My electrical failed i was hauling a trailer and i crashed into a car also the air didnt deploy we were traveling at 35mph my steering locked i couldnt aviod steering got real tight
NHTSA complaint #11478507 — an unverified report by a vehicle owner.
The most recent complaints
In the owners' own words, exactly as filed with NHTSA.
Virginia Beach, VA
STRUCTURE
See attached document for complaint.
NHTSA complaint #11758571 — an unverified report by a vehicle owner.
Stonewall, LA
ELECTRICAL SYSTEM
From time to time since I got the vehicle, the lights flicker inside and out. I've had the alternator changed but it continues. Then when pressing the lock button on the key fob the horn sounds as if it has a shortage. Sometimes its loud and sometimes it's barely heard.
NHTSA complaint #11758124 — an unverified report by a vehicle owner.
Bennington, NE
POWER TRAIN
My 2015 GMC Sierra 1500 SLE has the 6L80 transmission. While traveling on the interstate with my fiancé, the transmission failed. It was towed to a garage and they informed me that it needed to be replaced.
NHTSA complaint #11755314 — an unverified report by a vehicle owner.
Bottineau, ND
VISIBILITY/WIPER
my rear window defrost turned on when i auto started my pickup. i realized it was on after about a half hour and looked back and my drivers side of the rear sliding window was shattered completely
NHTSA complaint #11749832 — an unverified report by a vehicle owner.
Southaven, MS
SERVICE BRAKES
When backing up, either on a hill or flat surface, the brakes fail to stop the vehicle. There is a pulsing sensation with the brakes due to failure of the vacuum. The brake pedal also becomes impossible to depress. No warning lights appear when this occurs.
NHTSA complaint #11748839 — an unverified report by a vehicle owner.
at 153,000 milesSaginaw, MI
SEAT BELTS
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at 25 MPH, the front driver's seat belt completely failed. The lap belt portion came apart, causing the chest strap to loosen. Upon inspection, the contact observed that the steel anchor cable bolted to the floor had separated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 153,000.
NHTSA complaint #11742780 — an unverified report by a vehicle owner.
Greene, RI
POWER TRAIN
For no apparent reason the truck goes into “low power mode” and gives off code p2138 often happens around 30-35 mph. Have had it happen to me also around 45 mph also. I have replaced sensors and parts to which a month or so goes by and it happens again.
NHTSA complaint #11740204 — an unverified report by a vehicle owner.
Greene, RI
UNKNOWN OR OTHER
For no apparent reason the truck goes into “low power mode” and gives off code p2138 often happens around 30-35 mph. Have had it happen to me also around 45 mph also. I have replaced sensors and parts to which a month or so goes by and it happens again.
NHTSA complaint #11740204 — an unverified report by a vehicle owner.
Greene, RI
ELECTRICAL SYSTEM
For no apparent reason the truck goes into “low power mode” and gives off code p2138 often happens around 30-35 mph. Have had it happen to me also around 45 mph also. I have replaced sensors and parts to which a month or so goes by and it happens again.
NHTSA complaint #11740204 — an unverified report by a vehicle owner.
Blythewood, SC
SERVICE BRAKES
Vehicle doesn't stop in low speeds
NHTSA complaint #11738356 — an unverified report by a vehicle owner.
at 90,100 milesLawrence, KS
SERVICE BRAKES, HYDRAULIC
The contact owns a 2015 GMC Sierra. The contact stated that while driving at an undisclosed speed and also while the vehicle was parked, the ABS and stability control warning lights would unexpectedly illuminate. The vehicle was taken to an independent mechanic, where the warning lights were cleared. The contact was informed that if the failure recurred, the EBCM and BPMV would need to be replaced. The vehicle was not repaired. The contact stated that the failure recurred. The vehicle was then taken to the dealer, where it was diagnosed that the EBCM and BPMV had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 90,100.
NHTSA complaint #11737603 — an unverified report by a vehicle owner.
at 90,100 milesLawrence, KS
ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM
The contact owns a 2015 GMC Sierra. The contact stated that while driving at an undisclosed speed and also while the vehicle was parked, the ABS and stability control warning lights would unexpectedly illuminate. The vehicle was taken to an independent mechanic, where the warning lights were cleared. The contact was informed that if the failure recurred, the EBCM and BPMV would need to be replaced. The vehicle was not repaired. The contact stated that the failure recurred. The vehicle was then taken to the dealer, where it was diagnosed that the EBCM and BPMV had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 90,100.
NHTSA complaint #11737603 — an unverified report by a vehicle owner.
Camden, SC
ENGINE
Active Fuel Management Miss firing Idle rough Shaking Loss of power #7 cylinder loss of all compression Bad fuel mileage Skipping
NHTSA complaint #11732442 — an unverified report by a vehicle owner.
at 218,000 milesBerryville, ARCrash
AIR BAGS
The contact owns a 2015 GMC Sierra 1500. While traveling on a two-lane highway at approximately 55 MPH, another vehicle suddenly turned into the contact's lane, resulting in a severe frontal "T-bone" collision. The force of the impact caused the other vehicle to be propelled into a ditch, while the contact's vehicle remained on the roadway. Despite the significant nature of the crash and the speed involved, no air bags deployed. The dealer was notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 218,000.
NHTSA complaint #11728045 — an unverified report by a vehicle owner.
Howard, WI
SUSPENSION
Truck started to make loud clunking noise when driving taken it to two shops and wrong parts were installed as stated below. Bought from a used car dealership and they sold it as is now with the wrong parts.
NHTSA complaint #11726316 — an unverified report by a vehicle owner.
Howard, WI
STRUCTURE:BODY
Truck started to make loud clunking noise when driving taken it to two shops and wrong parts were installed as stated below. Bought from a used car dealership and they sold it as is now with the wrong parts.
NHTSA complaint #11726316 — an unverified report by a vehicle owner.
Howard, WI
STRUCTURE:BODY
Bad paint used by manufacturers that causes frames to rust out.
NHTSA complaint #11726320 — an unverified report by a vehicle owner.
at 124,000 milesApopka, FLFire
ENGINE
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at approximately 45 mph, he observed a popping noise beneath him. The contact stopped the vehicle and observed smoke emanating from the front of the vehicle. The vehicle went into limp mode, lost power, and when the brake was depressed, the vehicle did not slow the vehicle down as intended. The contact stated that as he pulled into a parking lot to inspect the vehicle, he observed flames emanating from the hood. The contact stated that he pressed the hood latch, which did not open the hood, and he then exited the vehicle and observed the hood engulfed in flames. The contact mentioned that a store employee brought a fire extinguisher out and attempted to extinguish the flames. The fire department was called and extinguished the fire fully. There was no police report, but the police did come out to assist. The contact sustained a right-hand injury, but medical attention was not needed. The vehicle was then towed to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 124,000.
NHTSA complaint #11724912 — an unverified report by a vehicle owner.
Post Falls, ID
ENGINE
Another GM truck AFM failing. It failed at 70,000 miles causing P0307 cylinder 7 misfire. No aggressive driving just commuting to work. Truck just got done with a new oil change. It's another to add to the hundreds/thousands seen on Reddit threads of all 5.3/6.2 AFM/DFM that this organization turns a blind eye to.
NHTSA complaint #11722758 — an unverified report by a vehicle owner.
Carlsbad, NM
UNKNOWN OR OTHER
I had and still have the Brake Assist failure warning light on and having issues with brake pedal effort not working as it should to stop vehicle and also the stability control warning lights., the brakes hardly work at all at low speeds and most of the time don't stop the vehicle almost causing several crashes. I took vehicle to gm service center and they said they updated software but when I picked up the vehicle and drove it not long after the brake assist warning came back on and I still had no brakes at slower speeds and the problem had actually gotten worse than it was before i took it to them. I called the dealership and told them that the problem had not been fixed and it was worse they said that I would have to pay the service fee / price for parts if I wanted to bring the vehicle back in and to have problem fixed...I explained it was a re call and it was taken to them to have issue fixed in the first place ...and I was told I would have to pay since they updated software ..I then explained it was worse than when I took it to them and still got denied any kind of resolution to the problem. Nothing was fixed or solved. I still had the warning lights on dash and the problem was worse then when I took the vehicle to them for repair. Not long after the transmission went out and the vehicle hadn't been drove. So it sat for 2 yrs or so. I just got a new one put in and the vehicle still has the same problems with the brake system . I reached out to dealership once again and was told I would still have to pay to have the issues fixed when it was never taken care of by them to begin with.
NHTSA complaint #11721467 — an unverified report by a vehicle owner.
Carlsbad, NM
SERVICE BRAKES
I had and still have the Brake Assist failure warning light on and having issues with brake pedal effort not working as it should to stop vehicle and also the stability control warning lights., the brakes hardly work at all at low speeds and most of the time don't stop the vehicle almost causing several crashes. I took vehicle to gm service center and they said they updated software but when I picked up the vehicle and drove it not long after the brake assist warning came back on and I still had no brakes at slower speeds and the problem had actually gotten worse than it was before i took it to them. I called the dealership and told them that the problem had not been fixed and it was worse they said that I would have to pay the service fee / price for parts if I wanted to bring the vehicle back in and to have problem fixed...I explained it was a re call and it was taken to them to have issue fixed in the first place ...and I was told I would have to pay since they updated software ..I then explained it was worse than when I took it to them and still got denied any kind of resolution to the problem. Nothing was fixed or solved. I still had the warning lights on dash and the problem was worse then when I took the vehicle to them for repair. Not long after the transmission went out and the vehicle hadn't been drove. So it sat for 2 yrs or so. I just got a new one put in and the vehicle still has the same problems with the brake system . I reached out to dealership once again and was told I would still have to pay to have the issues fixed when it was never taken care of by them to begin with.
NHTSA complaint #11721467 — an unverified report by a vehicle owner.
Shrewsbury, MAFire
ELECTRICAL SYSTEM
I remote started my truck, and when I got to it there was smoke and a flame coming from the rear power window. The remote start activates the rear defrosters, which started the electrical issues. I shut off the engine, and a loud pop followed, which was the shattering of the driver side rear window. The flame went out, and could have easily ignited the tarp covering the truck bed. There were no warnings on the console for the issue, and no recalls available. I have seen similar recall, but in a different state and back in 2022. This leaves me with a shattered window in the back, which is unsafe for visibility, and a bill to pay due to manufacturing errors for a feature in the truck. The rear window is all melted, and the glass is chipping away.
NHTSA complaint #11720409 — an unverified report by a vehicle owner.
Puyallup, WA
POWER TRAIN
During day to day driving when the truck is accelerating from a stopped position there's a massive clunk or hard shift from either 1st to 2nd gear. have also heard similar complaints from other 2015 sierra 1500 owners saying the transmission is having a hard shift on acceleration from a stop. Have seen possible issues with the TCCM
NHTSA complaint #11718679 — an unverified report by a vehicle owner.
at 132,235 milesShepherdsville, KY
SERVICE BRAKES, HYDRAULIC
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was firm and unresponsive, and the vehicle was difficult to stop. The vehicle eventually came to a stop with the ABS warning light illuminated. The vehicle was driven back to the residence. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 132,235.
NHTSA complaint #11718801 — an unverified report by a vehicle owner.
Lucasville, OH
POWER TRAIN
Tranmission is shuttering and not wanting to shift right
NHTSA complaint #11718485 — an unverified report by a vehicle owner.