2005 Chevrolet Avalanche 1500 Q&A
2005 Chevrolet Avalanche 1500 Question: What do I do to fix Check engine light? See Below.
Notice of "check Gas cap" came up dashboard Tuesday. Gas cap was tight. Repair shop Cleared code - light went out. On Wednesday check Eng light came on. Replaced Gas cap. Repair shop Cleared code again- light went out. On the way home light came back on again. Diagnostic meter says "Emission Sensor Valve" Both times -->i believe was the Code name when they told me to tighten and/or change the Gas Cap which neither worked. Any suggestions?? What & where is the Emission Sensor Valve?? - 4thgeer
The evaporative emission system has a small leak usually it is the fuel cap. It seems like the cap being the problem has been eliminated. A good repair shop should be able to perform a smoke test to find the source of the leak. The canister vent valve is a common failure item on the avalance. - Chevy Power
YOUR EVAP SYSTEM HAS A LEAK YOU NEED TO HAVE IT DIAG IT COULD BE 1 OF THREE SYSTEMS CAUSING THE ISSUE AND OF THOSE THREE IT COULD BE EVVN A BAD HOSE. HAVE SMOKE TEST DONE TO DETERMINE IF THERE IS A LEAK - globalhelper
get the specific code(s) from them (if not already listed on your reciept) and post it here , maybe some one with GM experience with it can help get you in the right direction. AND possibly get references for a different shop ? - ziptie12