10.0

really awful
Crashes / Fires:
1 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
29,809 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

Get notified about new defects, investigations, recalls & lawsuits for the 2015 GMC Sierra 1500:

Unsubscribe any time. We don't sell/share your email.

« Read the previous 20 complaints

problem #1

May 182015

Sierra 1500

  • 4,892 miles
Made 1 trip out of state to visit my son and to carry him a bedroom suite. I live in ga. And he lives in tenn. When I returned I noticed fluid under the truck. Called dealer in brunswick ga. They said to bring the truck then. When truck was put on rack, found engine heads were faulty. Had to order new heads, then had to machine heads when arrived. Also transmission down shifted extremely hard in hills of North ga. To the point of engine RPM 4500. Contacted GMC complaint dept. But as of 6/2/15 no help.

- Jesup, GA, USA