We found the following complaints for GMC SIERRA 3500 (2021)
Read complaints for GMC SIERRA 3500 (2021)
Trailer brake wiring connection continually disconnectsthen reconnects some time later. Some periods of up to 10 minutes without having trailer braking power. Major safety issue when toeing fifth wheel trailer. We lost brakes going down steep grades. Gmc is aware of issue, but has not provided a solution. Vehicle has been yo service shop with no resolution. Case has been opened with gmc.
Trailer brake wiring connection continually disconnectsthen reconnects some time later. Some periods of up to 10 minutes without having trailer braking power. Major safety issue when toeing fifth wheel trailer. We lost brakes going down steep grades. Gmc is aware of issue, but has not provided a solution. Vehicle has been yo service shop with no resolution. Case has been opened with gmc.
Read more
