Having problems with your 2004 GMC Envoy ?
I have a 2004 gmc envoy the check engine light came on shorlty after the car started to idle and drive rough...i took it to auto zone the test said misfire code 3.. i replaced the sparkplugs ..but my vechile is running horrible.. it almost feels like its going to die out.. all fluids are fine as well as transmission..what can it be?!
Most likley a bad coil on the cylinder thats missfiring.
Repair Help & Product Troubleshooting for 2004 GMC Envoy
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.