GMC Envoy Engine Poor Mileage

Browse GMC Envoy Engine Poor Mileage questions and answers. Choose a question that matches your symptoms.

1 discussion

DOD, AFM Not Working

2004 GMC ENVOY

Active Fuel Management (afm) Is A Trademarked General Motors Technology That Improves Gas Mileage By Shutting Down Half Of The Cylinders...

38 ANSWERS

5 VIDEOS

27 IMAGES

Asked by Paul Kremer

Browse other repair topics

Browse by repair topic

Burning Oil Click Coolant In Oil Damaged Hard to Start Hesitate Idle High Idle Low Idle Rough Knock Loud Low Power Misfire Not Cranking Over Not Running Oil Leak Overheat Poor Mileage Revs Up Runs Hot Runs Rough Shakes Smell Sputter Stall While Driving Stall at Idle Surge Vibration Whine Will not shut off

Can’t find your issue?

Ask a new GMC Envoy question