10.0

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

About These NHTSA Complaints:

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.

2015 GMC Sierra 1500 engine problems

engine problem

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2015 GMC Sierra 1500 Owner Comments (Page 4 of 4)

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problem #1

May 182015

Sierra 1500

  • 4,892 miles

A D V E R T I S E M E N T S

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

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