2.0

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
78,500 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.

2012 GMC Sierra 2500 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2012 GMC Sierra 2500:

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

2012 GMC Sierra 2500 Owner Comments

problem #2

Oct 102020

Sierra 2500

  • 70,000 miles

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

While traveling on the interstate at speed and passing slower traffic; engine power fell off, change fuel filter now, engine derate, and check engine lite, occured. I had to maneuver with no power through the traffic to get out of the travel lanes. I was then stranded on the interstate as the truck would not start. I was able to get a mechanic to come and change the fuel filter on the side of the highway, but the truck would not start. The truck was eventually towed to a shop where it was diagnosed with a catastrophic failure of the fuel pump (diesel motor driven pump).

- Mount Vernon, IL, USA

problem #1

Aug 282017

Sierra 2500

  • 87,000 miles
Emissions failure. Nox sensor, def system. Driving, display states, poor def quality. Took in for repair, still def quality. Truck has slowed to 55mph, will slow to 4 mph in 39 miles. They are trowing parts at it at my expense. Can't properly diagnose. This problem is from 2010- current models of these diesels.

- Lepanto, AR, USA

Not what you are looking for?