This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
Transmission cooler lines failed causing transmission oil to spray on the hot exhaust pipe that runs directly under it. GMC claims this is not a defect, but it seems that a fire could easily result as well as extensive transmission damage. Transmission is 4L80E model.
- Germantown, WI, USA
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- Mendocino, CA, USA