10.0

really awful
Typical Repair Cost:
$12,970
Average Mileage:
181,000 miles
Total Complaints:
2 complaints

Most common solutions:

  1. replace entire fuel system (2 reports)
Get notified about new defects, investigations, recalls & lawsuits for the 2015 GMC Sierra 3500:

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

problem #2

Oct 072023

Sierra 3500 Duramax

  • Automatic transmission
  • 200,000 miles

click to see larger images

injection pump explodes

Just bought this truck for 30,000 made third payment on it. Now it going to cost me 16,200 just to fix something that is know as a problem. I own 3 GMC. I might have to rethink move to another company to bad corporations don't care about there products like they used to.

- Kevin H., Cedar Creek, US

Send Comment Add Complaint
problem #1

Dec 202020

Sierra 3500 Denali 6.6L

  • Automatic transmission
  • 162,000 miles

Basically the injection pump explodes sending metal into the entire fuel system, pump rails lines and injectors. Cost anywhere between 10k and 20k to fix. No one is prepared for an expense like this. There are disaster prevention kits out now but most dont find out until it's too late. There are many cases when the truck hits 150k to 180k miles 2015 GMC 3500 Denali 6.6 Duramax. 162000 miles

- Michael J., Pittsburgh, PA, US

Send Comment Add Complaint