Equipment Problems of GMC Sierra 1500 - part 1

There is a water leak in the rear passenger compartment of my vehicle. Unsure where water is coming from. Continued leaking poses a risk to my safety as I may be exposed to black mold as well as anyone else who is riding in my vehicle. The problem hasn’t been addressed by the dealer yet but this is a known issue. At this point I have spoken with a representative from the service department at the dealership but cannot get an appointment for several weeks. I was also advised that the problem would need to be diagnosed before being addressed at my cost due to being outside of the warranty period. There were no warning lights or any other signs that this is occurring and was only discovered because I was putting something in the back seat on 6/26/26.

See all problems of the 2021 GMC Sierra 1500 🔎.

This vehicles top portion of grill trim is starting to come loose, as this is a safety concern while on the highway, I had another vehicle that the trim flew off completely, (same year and model) while I was on the highway. This could hit another vehicle if this happens, or god forbid a person who happens to be on a sidewalk. I looked into this and found that there is a recall for the same issue on 2022 models that has not been extended to the 2024 model (recall n242490120). This recall should be extended to the 2024 models as this is a huge safety concern.

See all problems of the 2024 GMC Sierra 1500 🔎.

The problem is in the power-locking manual tailgate’s exterior release switch assembly. Water intrusion into the switch can cause a short circuit, leading the tailgate to unlatch while the truck is in park. Once moving, momentum and air pressure can cause the tailgate to open further, potentially dumping cargo onto the road and creating a hazard.

Vehicle will not consistently shut off. Shift to park error received upon trying to shut vehicle off. Concerns on if the vehicle is actually in park and if it is safe to exit vehicle. Concern that vehicle is not in park and electrical units aren’t being properly shut down (I. E. Radio).

Either while stopping while driving or parking (forward or reverse) the engine rpms go up thus wanting to move the vehicle in that direction causing the breaks needing to be applied harder. When you shift into neutral the rpms go way up (3000). This has happened on this vehicle 3-4 times of which I have video of the latest occurrence. When put into r or d the rpms are still over 1000. This also happened on the courtesy vehicle same make and model) I was given but on this one the rpms went up to 5000 of which I also have a video. The dealership has not been able to duplicate the issue as of yet. My fear is that the vehicle will hit someone or something if the break isn't pressed to the floor. It happens very randomly. The dealer currently has my vehicle trying to figure it out. They say gm says there's nothing they can do. No warning lights or messages appeared.

See all problems of the 2025 GMC Sierra 1500 🔎.

When I put the vehicle in park, the dash warning says it is not in park or shift to park. The components continue to work. I have taken it to the dealership and according to the service manger, this is a very common occurrence in these trucks. This seems to me that it would be a very serious safety issue if one assumes their vehicle is in park and it is actually not. The shift to park warning is a safety warning to alert the driver it is not in park so the vehicle doesn’t roll off and hit someone (especially a child playing in the driveway). Assuming that alert is just a malfunction could get someone killed. I did notice that this was considered a safety recall for some models of GMC vehicles but not others. I’m not sure why there hasn’t been a recall on these trucks when the service manager specifically said they are having this issue on a lot of trucks.

The screen shakes. Goes black. Zooms in randomly without prompting. Started dialing up people from recent calls. While trying to get the navigation working. I started drifting into oncoming traffic. Fortunately was able to course correct and avoid collision. Buttons are most time not responsive to touch. It is distracting. The system has never fully worked as promised and is a distraction. And as a result a serious safety hazard.

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.

See all problems of the 2015 GMC Sierra 1500 🔎.

They should be responsible for repairs or replacement of the cheap made frames that rust away so fast so u ain’t gotta worry about your truck fallling apart going down the rd and the lower control arms made of cast that rust from inside out and you don’t know until breaks while driving along with camber adjustments where they can throw alignment out with a single bump. Mostly the frame replacement is major always having to plate frame or check to make sure it will be able travel long trips or haul stuff in bed or a trailer with breaking or falling off truck causing wreck frame repair is major and time consuming if you don’t have proper stuff and definitely expensive and lower control arms that’ll make a wheel come real fast and it’s time consuming and expensive too but very dangerous and breaks and causes damage right then and there at high or low speed on highways or interstates.

See all problems of the 2012 GMC Sierra 1500 🔎.

Upper grille detachment while driving on the interstate at 70 mph at night ,hit the windshield. Could not find it.

Electronic tailgate failed when driving uphill. Tailgate fell open.

See all problems of the 2022 GMC Sierra 1500 🔎.

Telematics (onstar) module dealership has checked it, the telmatic module is bad. And the dealership I went to dossit big 4 in tupelo ms told me this has been a problem with this truck. And are wanting me to pay $645 to fix it. After they just did some recalls and updated the software. This was working before then.

Coolant control valve failing. Warranty not covering this part. Seems to be a manufactured issue. Happening on a lot of 2021 gmnc sierras with the 3. 0l duramax.

Safety complaint – delayed acceleration from automatic engine stop/start I am reporting a safety concern regarding the automatic engine stop/start system in my GMC truck. During normal operation, the system shuts the engine off when the vehicle comes to a complete stop. When I release the brake and press the accelerator, there is a noticeable delay while the engine restarts before power is delivered to the wheels. This creates a hesitation between driver input and vehicle response. This delay presents a safety concern because it affects my ability to react quickly in situations that require immediate acceleration. I have experienced multiple real-world scenarios where this hesitation impacts safe operation: while stopped at an intersection preparing to turn, I observed oncoming traffic approaching faster than expected. When I attempted to accelerate to complete the turn, the delay caused by the engine restart reduced my ability to clear the intersection promptly. In stop-and-go traffic, I needed to move forward quickly to maintain safe spacing or respond to changing traffic conditions. The hesitation before acceleration limited my ability to react immediately. When pulling into traffic from a parking lot or side street, heavy traffic often creates small gaps that require prompt acceleration. Due to the delay in engine restart, it is difficult to accurately gauge and anticipate the truck’s response when pressing the accelerator. With this hesitation, safely merging into traffic in these conditions becomes extremely difficult and, at times, effectively impossible. In situations where a vehicle encroaches into my lane or a hazard develops unexpectedly, the delayed throttle response reduces my ability to maneuver out of the way quickly. This is not simply a convenience issue. The system introduces a delay between driver input and vehicle response, which can reduce reaction time in situations where immediate acceleration is necessary to avoid a potential hazard.

Engine coolant control valve.

I took my truck in for routine maintenance. When I got it back and turn the truck on, the instrument cluster was completely black. I couldn't get it to turn on. I went back into the dealer and informed them of the issue. The claimed they had not done anything electrical the dealer has told me that they are not sure why it has stopped working but they did let me know they had to replace several instrument clusters with other customers. I am unsure if they had paid for the replacement or not. I've looked online as well and seen multiple GMC truck owners having the same issue and getting their instrument clusters replaced as well. I've noticed this is happening with 2022 models and above. Please look into. Thank you.

See all problems of the 2023 GMC Sierra 1500 🔎.

Onstar module failed. Unable to fix and needs replaced. Thousands of other individuals having same issue. Car can shutdown without warning while driving. This issue must be addressed by gm.

Vehicle fire. Total loss. While driving, vehicle began to smoke from under the hood. Fire grew rapidly and vehicle is totaled. No warning signs leading up to the incident.

I was driving down I-25 interstate and the sunroof exploded outward on the vehicle and sounded like I shot gun going off in the vehicle. I did experience a hard breaking situation due to the loud noise, no traffic accident from this situation. Called GMC service and warranty department and glass is only covered for 1 year.

“service driver assist system” message appears every time I turn on my truck. Vehicle would randomly break when driving at slow speeds and show the forward collision alert even if no objects/ car are approaching or being approached. I am concerned about my safety because those sudden hard-breaks could cause an accident.

Please append these work orders to this complaint number and VIN complaint: number xxx VIN: [xxx] three repair orders from beck & masten GMC south attached. Thank you!!! information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While driving at high way speeds the radio volume went to maximum high. I was unable to turn the volume down by any inputs. Mute was inoperative. Volume controls were overridden by the glitch. My hearing has been affected as well as the infant that was in the back seat. This is a serious condition that has now happened 4 times. No assistance from general motors. My ears have been ringing for 3 straight days now. This issue had happened since I bought the truck new in 2022.

Transmission blew on a 7 year old vehicle. Was replaced entirely and is now having the exact same problem again!.

See all problems of the 2019 GMC Sierra 1500 🔎.

Starter went out and needed replaced. I know there is a recall on other models in the same year and mode;l but mine wasnt listed.

See all problems of the 2014 GMC Sierra 1500 🔎.

P1098 code coolant control valve fail service bulletin n252508341 my VIN not covered but same motor and same part !.

I’ve owner the vehicle since new. My a/c condenser has failed 3 times, meaning I’m now about to be on my 4th. The welds are weak and it cracks in the same spot 95% of the time. It should last more than a 2 year average.

See all problems of the 2018 GMC Sierra 1500 🔎.

The rear window on my 2017 GMC sierra shattered unexpectedly without any impact. The vehicle had been remote started in very cold weather and the rear window glass suddenly shattered while the truck was parked. There was no rock strike or external damage that would explain the failure. I later learned about gm customer satisfaction program n192265660 regarding rear window defroster thermal events affecting certain 2014–2019 GMC sierra and Chevrolet silverado trucks. Based on the sudden failure and the conditions at the time, this appears consistent with that issue. The auto rear defog feature in the vehicle settings was turned off, however the truck had been started using the remote start feature when the glass shattered. Photos of the shattered window are available. I am submitting this report because the rear window defroster system may cause the glass to overheat and shatter unexpectedly.

See all problems of the 2017 GMC Sierra 1500 🔎.

When my android auto does not connect, it essentially disables the whole infotainment system which is incredibly distracting and dangerous while driving. I am requesting that this be fixed so that I can still use some of the infotainment system but they are redusing to to do anything to fix the issue. The dealer has advised that they are unable to fix the issue because it is software related but yet the software team is saying it is a dealer issue. Please help me get a resolution to this issue!.

While driving 65mph in my 2024 GMC sierra denali ultimate on interstate 270 in hilliard, ohio my chrome grill deflector just flew off and hit my windshield. It then went over my truck and almost caused a major accident with the cars and semi-trucks behind me. I was lucky to maintain control of my own vehicle! it appears to me that the mounting fractured and it looks like manufacturing defect. Looks like the same issues recalled in 2022 year models. How many have to die before gm fixes this issue? they now want $1,500 for a new grill on my 2024 truck.

Premature frame rot.

Was driving down interstate and the top of my grill came off and smacked my windshield. Also, my tailgate opens on its own but the grill is the main safety issue. I have seen where they already have recalls on 2022s and earlier due to chrome grill coming off but mine is a 2023 and gm is refusing to honor it when it is obviously the same issue. Was very scary and could have caused a wreck as grill ended up on interstate being thrown around by vehicles. Gm stated I would need recall added to my VIN in order for them to pay for it. Thank you!.

I had this truck as brand new for approximately 24 hours when it had a major failure. It had 450 miles on it at time of purchase, but was sold as new. While driving at 45mph it had a check engine light, service power steering message, lost power steering, lane departure system failure, and reduced power amongst several other lights on the dash. I limped the truck into a gas station parking lot. After turning the truck off, it would not restart. I unhooked the battery for a minute and hooked it back up. The truck did restart with no messages or check engine light. I was able to safely get it to the dealership. As a result of this issue, I forced the dealership to cancel the trade.

Rear glass window shattered due to the defroster getting too hot. Some smoke was noticed.

Rear tailgate on my 2021 sierra opens or drops when wet. This seems to only happen in a heavy rain or after a truck wash. This problem has been recognized by the manufacturer and the dealer. There is no warning other than the constant clicking of the electric switch allowing the tailgate to drop. This problem has been recalled on the 3/4 & 1 ton trucks but not the 1/2 ton. The tailgate and switches are the same on all 3. Because my VIN# does not show for this recall I had to pay for the replacement.

Engine lost all power while I was attempting to make a left turn at a very busy intersection. Dash kept saying “check battery”, jump pack did nothing. Engine wouldn’t start.