10.0

really awful
Typical Repair Cost:
$4,800
Average Mileage:
144,500 miles
Total Complaints:
1 complaints

Most common solutions:

  1. replaced head gasket and head (1 reports)
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problem #1

Aug 232017

Silverado 3500 LT 6.6L

  • Automatic transmission
  • 144,500 miles

This is the Duramax diesel (engine code LLY) which has some problems, but I will focus on this one. My head gasket blew around the #7 cylinder which also took a chunk of the head with it. I do run a performance program to help with the towing, but it is set at the lowest rating. A owner of a well respected diesel repair shop insured me the performance program did not cause this problem. It just seems to me this shouldn't have happened at this lower mileage.

- Wyattoneable .., Celina, TN, US