Check Engine Light Due to Gas Cap Issue on Chevrolet 1500 Pickup

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

RepairPal Verified
Average mileage: 127,850 (67,500–188,200)
Exhaust & Emissions affected: Gasoline
3 model years affected: 1996, 1997, 1998
5 people reported this problem
1 person shared problem details
Check engine light was on and had a code 420 or 430 can't remember but a new cat. conv. fixed it
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