Chevrolet Avalanche 1500 Problem Report

Chevrolet Avalanche 1500 Check Engine Light Due to Gas Cap Issue

(23 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Changed Gas Cap like Auto parts repair said to do and did not fix the problem. -
Problem: engine light on due to gas cap. I bought new gas caps several times. Now it says tighten fuel cap. -
check engine light and tighten full cap display -
I've had a continuing "check engine" light from a code indicating a vapor leak in the fuel system. After a couple of times resetting the light with a portable instrument (after clicking down on the gas cap), I changed the cap. That was in late February of 2012. Just last week, after getting fuel, the check engine light is on again. -
Light was on, then reset by my repair shop. They said to drive it 50 miles and come back. I drove it about 70 miles and it came back on. Cause and repair are undetermined at this time. -
MIL light came on and OBDII code reader indicated an "Open EEC Circuit" condition. Problem cleared by replacing gas cap with a "new" lockable cap and resetting the MIL light. -
check engine light Tighten gas cap new gas cap no change -
Check engine light came on in 2012 after gassing up and is still currently on. -
Autozone verified code and cleared it out for free. -
same issue replace cap still cjeck eng lighy -
faulty gas cap -
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