When I tighten the gas cap why does the led light read tighten gas cap
replace the gas cap....
Yep gas cap is leaking purge flow, check the spouts surface, make sure the sealing surface is clean, if it is then replace the cap.
Search Cadillac Escalade ESV Questions
Cadillac Escalade ESV Experts
#1Rigoberto Hecho de OroReputation140