NHTSA Complaint #11617429 — 2021 GMC SIERRA 3500
POWER TRAIN issue reported to NHTSA
Complaint Details
| ODI Number | 11617429 |
| Vehicle | 2021 GMC SIERRA 3500 |
| Component | POWER TRAIN |
| Date of Incident | |
| Date Filed | |
| Mileage | N/A miles |
| Crash | No |
| Fire | No |
| Injuries | 0 |
| Deaths | 0 |
| Vehicle Towed | No |
| State | FL |
Consumer Description
While driving 55mph on a 2 lane road, pulling a 5th wheel camper, the truck transmission downshifted by itself to a low gear. This caused a scary and immediate deceleration from 55 to 25mph. The trailer wanted to push into the oncoming lane the deceleration was so fast. The truck is at a dealership and they acknowledge the issue but not a fix other than putting back in the failed part. There was no warning and my readings say many others are having same issue. The small dealership we left the truck with (yemm Chevrolet in Galesburg Il) said they had 3 trucks with the same issue. The truck has been with the dealership for 7 weeks now.
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