We found the following complaints for GMC SIERRA 3500 (2020)
Read complaints for GMC SIERRA 3500 (2020)
Progressive pause starts when starting vehicle.after a few weeks of pause starting vehicle had no power at all.towed it to dealer they replaced a bad battery.pause start continued and after 4-5 weeks vehicle would not start.couldn't turn park break off.there was power (lights in dash came one) but didn't start.vehicle parked and only after sitting unused this happened both times.(1st time no start, hadn't driven for 3 days, end of summer weather) (2nd no start, sat overnight cool weather, but no freezing.towed to dealer and they found nothing wrong.
The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn polk the dealership in sanger texas has been working on a fix but has yet to come up with one.i have spoken with general motors representativesseveral time trying to resolve the problem without result.i also emailed the ceo last friday and have heard nothing. There were no warning lights until seconds before failure.
The computer lights up dash reducing power and taking the trailer brakes away.this almost caused a wreck when the truck shut offand the brakes failed.this truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure.glenn polk chevrolet in sanger has been working on this since the truck was new.also we have case open with general motors without resolution.the dash lights up at the same time as the brakes fail.
The computer lights up the dash reducing power and turning off power to trailer brakes.this has almost caused an accident on several occasions .it happens a couple oftimes per trips.this vehicle has been in the shop a couple of times per month since it was put into service.glenn polk chevrolet has worked on it each time and the problem is still there.this truck has also had several injector issues.there is an open case with this vehicle with general motors with no resolution.i have filled out forms on each of my 2020 gmc's 3500's.
The computer lite up the dash and reduced power, plus took the trailer brakes off line.this happened while loaded.to reset the system you have to pull over and turn the vehicle off.this happens 2-3 times per day.this was a problem at 600 miles.the transmission shifted from 10 gear to 5th gear while driving 75 miles per hour.the truck had 75,000 miles on it .had to send another truck out to pick up the load in santa rosa new mexico.the dealer glenn polk in sanger has been working on for the last 4 monthsthere is never a warning until the lights come on with a system failure.
The computer lights up the dash reducing power and turning off power to trailer brakes.this has almost caused an accident on several occasions .it happens a couple oftimes per trips.this vehicle has been in the shop a couple of times per month since it was put into service.glenn polk chevrolet has worked on it each time and the problem is still there.this truck has also had several injector issues.there is an open case with this vehicle with general motors with no resolution.i have filled out forms on each of my 2020 gmc's 3500's.
The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn polk the dealership in sanger texas has been working on a fix but has yet to come up with one.i have spoken with general motors representativesseveral time trying to resolve the problem without result.i also emailed the ceo last friday and have heard nothing. There were no warning lights until seconds before failure.
The computer lite up the dash and reduced power, plus took the trailer brakes off line.this happened while loaded.to reset the system you have to pull over and turn the vehicle off.this happens 2-3 times per day.this was a problem at 600 miles.the transmission shifted from 10 gear to 5th gear while driving 75 miles per hour.the truck had 75,000 miles on it .had to send another truck out to pick up the load in santa rosa new mexico.the dealer glenn polk in sanger has been working on for the last 4 monthsthere is never a warning until the lights come on with a system failure.
The computer lights up the dash reducing power and turning off power to trailer brakes.this has almost caused an accident on several occasions .it happens a couple oftimes per trips.this vehicle has been in the shop a couple of times per month since it was put into service.glenn polk chevrolet has worked on it each time and the problem is still there.this truck has also had several injector issues.there is an open case with this vehicle with general motors with no resolution.i have filled out forms on each of my 2020 gmc's 3500's.
The computer lite up the dash and reduced power, plus took the trailer brakes off line.this happened while loaded.to reset the system you have to pull over and turn the vehicle off.this happens 2-3 times per day.this was a problem at 600 miles.the transmission shifted from 10 gear to 5th gear while driving 75 miles per hour.the truck had 75,000 miles on it .had to send another truck out to pick up the load in santa rosa new mexico.the dealer glenn polk in sanger has been working on for the last 4 monthsthere is never a warning until the lights come on with a system failure.
The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn polk the dealership in sanger texas has been working on a fix but has yet to come up with one.i have spoken with general motors representativesseveral time trying to resolve the problem without result.i also emailed the ceo last friday and have heard nothing. There were no warning lights until seconds before failure.
The computer lights up dash reducing power and taking the trailer brakes away.this almost caused a wreck when the truck shut offand the brakes failed.this truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure.glenn polk chevrolet in sanger has been working on this since the truck was new.also we have case open with general motors without resolution.the dash lights up at the same time as the brakes fail.
Vehicle exhibits steering wheel shake / shimmy at speeds above 50mph, sometimes severe.repeated attempts at repair (currently 4 dealer visits), including application of service bulletin 19-na-240 does not correct the problem.gm has now indicated this is a "normal" condition, and will not authorize further warranty reimbursable labor for correction to dealer.this steering condition affects safety as it occurs in varying severity and with no warning, especially during driving over rough pavement / bumps, and has nearly lead to a loss of control of the truck. This condition was present at delivery of truck at 221 miles.truck currently has 1688 miles.
While towing a fifth wheel camper, the exhaust was so hot it melted the camper directly behind it. Was caught in side mirror before anything caught on fire.
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