Chevrolet Express 3500 Problem Report
Chevrolet Express 3500 Check Engine Light Due to Gas Cap Issue
A Loose or worn gas cap may cause Check Engine Light to illuminate.
check engine light came in driving in IL IN and KY. Went back out when I got back to TX where it was alot warmer. Happened twice on diffrent trips into a colder climate. Turned out to be a bad gas cap... - Visitor
A loose or worn gas cap could be cause the Check Engine Light to illuminate.
One or both secondary air injection check valves may become restricted causing poor air flow re...
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