Discussion in 'Chevy Trailblazer Forum (GMC Envoy)' started by mitchl, Apr 15, 2009.
Looking to find out if the ECM on these trucks can be reprogrammed for better gas mileage??
Go to trailvoy There is plenty of info there that will help and threads that has info also. Look for www.pcmforless.com for retunes..........
move to ams oil or some thing like that up date air intake also if your 08 is under warranty becareful.
Yea..Ams oil is awesome..synthetic helped me out like a champ..also new tires and plugs and wires best your gonna do. If it works let me know though.
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