Trailblazer SS

Check Engine Light Due to Gas Cap Issue on Chevrolet Trailblazer SS

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 75,214 (35,000–119,100)
4 model years affected: 2006, 2007, 2008, 2009
12 people reported this problem
Viewing 1 - 5 of 5 comments
Check engine light on steady. Also received the "tighten gas cap" message. Will replace cap with new and report back if that doesn't fix it. 7/17/14
tighten gas cap light still on . bought new oem gm cap and that fixed the problem for awhile now its doing it again .