Silverado 3500 HD

Check Engine Light Due to Gas Cap Issue on Chevrolet Silverado 3500 HD

Problem Description and Possible Solution

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 72,500 (45,000–100,000)
Exhaust & Emissions affected: Gasoline
4 model years affected: 2007, 2008, 2009, 2010
8 people reported this problem
Viewing 1 - 2 of 2 comments
Showed up as tighten gas cap but replaced with a original from GM and this was not the problem had to have it smoked and found out it was a cracked fuel pump.
Check engine lite would come on in IL cold weather and go out in TX hot weather. Was told it was a oxygen sensor but turned out to be gas cap???