GMC Sierra 1500 body problems

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See attached document for complaint.

NHTSA complaint #11758571 — an unverified report by a vehicle owner.

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The upper grille trim piece came off while driving down I20 between Hudson Oaks and Willow Park. I was doing between 60-65 mph. It could’ve hit other vehicles behind me, or to the side of me. This piece is a known issue and the 2022’s have a recall but not the 2023 model years. No signs of this being about to break.

NHTSA complaint #11757856 — an unverified report by a vehicle owner.

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The upper grill chrome trim blew off at highway speed. The plastic brackets holding it in place sheared off. This was a known defect resulting in 70,000 recalled trucks for the prior year model (2022), but for some reason isn't covered for 2023. Same exact issue

NHTSA complaint #11757457 — an unverified report by a vehicle owner.

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The molding cover for the hood fell off by Hwy speed, and recently we I went to oil change after I get the car the technician said the bolt for tie the oil thing is not correct and it’s not for this car and this was the reason for leaking and need to replace with right one.

NHTSA complaint #11757322 — an unverified report by a vehicle owner.

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rear sliding window has plastic body seam that is broken allowing water to leak into the truck and cause mold and rust

NHTSA complaint #11756772 — an unverified report by a vehicle owner.

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Whilst driving down the highway at 65 mph the plastic front grill deflector broke off and slammed into my windshield and the vehicle behind me. Luckily the vehicle behind me sustained no damage other than how frightened she and her children were. This is a known issue and was subject to a recall for the 2022 GMC Sierra Denali's. Nothing has changed between the 2 models as far as I can tell and it's the exact same grill deflector. When I informed the dealership of this they told me it would be a $950 repair out of pocket. First of all, it is unacceptable for a $75,000 vehicle to have a plastic component that can just break off and become an immediate and unavoidable hazard on the highways. The recall MUST be extended to these vehicles. I have reached out to GM and they confirmed it would be an out of pocket expense, but I am escalating the situation. Thank you!

NHTSA complaint #11756641 — an unverified report by a vehicle owner.

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Paint is failing and delaminating from both rear doors around windows and also the truck bed.

NHTSA complaint #11756538 — an unverified report by a vehicle owner.

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I started to notice detached broken plastic pieces behind the upper grill housing. I notified the dealer, and in the meantime of trying to figure out what to do, the upper grill housing came detached when I was driving down the highway and flew up and back onto the highway. Sounds similar to safety recall N242490120, which was for 2022 model year trucks. Not sure why this stopped at 2022, but it happed on my 2023.

NHTSA complaint #11755830 — an unverified report by a vehicle owner.

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Vehicle: 2023 GMC Sierra 1500 SLE VIN: [XXX] While driving southbound on [XXX] near exit [XXX], the front upper grille molding/deflector completely detached from my 2023 GMC Sierra 1500 SLE at highway speed and separated from the vehicle, creating a potential road hazard for other motorists. Prior to the complete separation, I noticed that the upper grille molding was becoming loose and lifting away from the vehicle. I stopped and photographed the component and its attachment areas. The photographs show failed/broken attachment points while the molding was still partially attached to the truck. Later, while driving on [XXX] to work, the remaining attachments failed and the entire molding separated from the vehicle. The part could not safely be recovered from the interstate. The vehicle recently underwent dealer service involving the active grille shutter/damper area near this component. I cannot determine whether that service contributed to the failure, so I am reporting it as part of the vehicle's recent service history rather than asserting it as the cause. I subsequently became aware that NHTSA Recall 25V-060 / GM Recall N242490120 addresses separation of a front upper grille deflector on certain GMC Sierra 1500 vehicles due to fractured attachment points. My vehicle is a 2023 model and does not presently appear to be included in that recall. Because my vehicle experienced a similar failure mode resulting in the exterior component completely separating at highway speed, I am submitting this complaint so NHTSA can determine whether this condition may extend beyond the vehicles currently covered by the recall. Photographs documenting the component and failed attachment areas before its complete separation are available. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11755700 — an unverified report by a vehicle owner.

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While driving southbound on Interstate 95 in Florida, the front upper grille molding/deflector completely detached from my 2023 GMC Sierra 1500 SLE at highway speed and separated from the vehicle, creating a potential road hazard for other motorists. Prior to the complete separation, I noticed that the upper grille molding was becoming loose and lifting away from the vehicle. I stopped and photographed the component and its attachment areas. The photographs show failed/broken attachment points while the molding was still partially attached to the truck. Later, while driving on I-95, the remaining attachments failed and the entire molding separated from the vehicle. The part could not safely be recovered from the interstate. The vehicle recently underwent dealer service involving the active grille shutter/damper area near this component. I cannot determine whether that service contributed to the failure, so I am reporting it as part of the vehicle's recent service history rather than asserting it as the cause. I subsequently became aware that NHTSA Recall 25V-060 / GM Recall N242490120 addresses separation of a front upper grille deflector on certain GMC Sierra 1500 vehicles due to fractured attachment points. My vehicle is a 2023 model and does not presently appear to be included in that recall. Because my vehicle experienced a similar failure mode resulting in the exterior component completely separating at highway speed, I am submitting this complaint so NHTSA can determine whether this condition may extend beyond the vehicles currently covered by the recall. Photographs documenting the component and failed attachment areas before its complete separation are available.

NHTSA complaint #11755702 — an unverified report by a vehicle owner.

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While driving my 2023 GMC Sierra on the highway at highway speeds, a piece of the front grille suddenly detached and flew off the vehicle. There was no prior accident, impact, or external damage to the grille; the part failed and unclipped on its own due to defective manufacturing or weak retaining clips. This creates a severe safety hazard as the flying debris could have struck the windshield of the vehicles traveling behind me, potentially causing a major accident. I am aware that the 2022 GMC Sierra has an active recall (N242490120) for this exact same issue, yet GM is refusing to cover this 2023 model under warranty or recall despite presenting identical component failure.

NHTSA complaint #11755666 — an unverified report by a vehicle owner.

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My grill deflector suddenly flew off, hit my windshield a flew into a semi hauling oil field equipment. We both pulled over and found no significant damage to his truck. I have a two inch scratch on my windshield and possibly lite hood scratching. Dealership required me to pay $390.73 but said I would be reimbursed for my losses. It never happened. Now I’m fighting with GM to get some resolution. This could be deadly for a motorcycle rider for sure. Hundreds of people reporting same issue on 22 and 23 Sierras and AT4’s.

NHTSA complaint #11755152 — an unverified report by a vehicle owner.

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My truck was serviced for the front chrome grill separation recall last year. On Saturday, 8/1/2026 while driving at highway speed the grill deflector separated from the vehicle violently. I was able to pull off of the highway and remove the part as only the passenger corner clip (with screw) was partially retaining the deflector. Upon looking at the "repair" or recall, the corrective action does not appear to have been done correctly per N242490120. The chrome coating was not scuffed let alone removed from the part and an insufficient amount of epoxy was used to attach this deflector. Damage was done to the hood and lower grill during this incident. I have had numerous and considerable issues with the purchasing/servicing dealership where I bought this truck.

NHTSA complaint #11754274 — an unverified report by a vehicle owner.

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The front grille bezel mounting clips broke and it started to fly off while driving on the highway. Luckily, I was able to pull over before the last clip broke and took it off before it became a spear flying at the cars behind me. There is an active recall for this issue for the 2022 GMC Sierra 1500 models, but not 2023/2024 models (same body I believe).

NHTSA complaint #11753825 — an unverified report by a vehicle owner.

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The grill deflector flew off while driving on the highway. I was driving roughly 55 mph. It is available now, but will be getting repaired in the near future. My concern is that it appears that this was an issue with the 2022 models and it’s still an issue on the 2023. The safety issue is if there was a vehicle or motorcycle behind me that it could have harmed whoever could have been driving behind me, caused and accident, or damaged their vehicle or mine in the process. The service advisor (J.R.) told me that “sometimes the wind gets underneath the bezel and makes it snap”. No it has not been inspected by any of this mentioned. No warning signs prior to the incident.

NHTSA complaint #11753855 — an unverified report by a vehicle owner.

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While driving at highway speed in normal traffic, the upper front grill deflector detached from the vehicle and struck the windshield, cracking the windshield. This appears consistent with the defect that is the subject of Safety Recall N24290120.

NHTSA complaint #11751734 — an unverified report by a vehicle owner.

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The upper top grille mold detached from the vehicle while traveling at highway speed (about 65 mph). It hit the hood, which it scratched and flew off into the air, above the vehicle and in the way of oncoming traffic. Fortunately, no one was behind me so the part did not hit another vehicle. Vehicle had around 65k miles when this occured. I have contacted a local dealership who informed me that while many similar vehicles have a recall for this issue my VIN is not included in that recall.

NHTSA complaint #11750528 — an unverified report by a vehicle owner.

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The upper hood trim that sits above the grill, flew off on the interstate at approx 80 mph. Upon research this is a common problem for this make and model in years of 22-24. GM has a service bulletin for this issue as well as the NHTSA. For this particular failure. There was no warning and when I contacted GM they were unwilling to assist as "service bulletins" are not recalls and the vehicle is out of warranty. There was no warning, no indicator, it just blew off and I had no idea until I got home and the piece was missing. I was unable to locate the part on the interstate, however I was able to keep all of the pieces attached to the vehicle for evidence and support. I am beside myself anyone thought this was acceptable to sustain the force of air flow!

NHTSA complaint #11750161 — an unverified report by a vehicle owner.

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1 year after having the grill deflector piece being replaced on my 2022 GMC Sierra 1500 AT4X, under the recall. The new grill deflector became detached and flew off my vehicle. Clearly, the recall fix by GMC did not work.

NHTSA complaint #11749272 — an unverified report by a vehicle owner.

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My 2026 GMC Sierra has an oil-canned roof from a touchless car wash because the sheet metal lacks structural rigidity. This caused the roof to buckle and caused a permanent fold in the roof of the truck. There is already documented issues for this exact problem on the newer GMC Canyons and Chevrolet Colorado mid-sized trucks. Bulletin for reference NHTSA Official TSB #23-NA-209 PDF. I leased the vehicle on 6/19/2026 and this happened on approximately 7/7/2026. The vehicle only has 1,480 miles on it as of this date.

NHTSA complaint #11749108 — an unverified report by a vehicle owner.