Mechanics

GMC ENVOY COIL PACK PROBLEM

2004 GMC Envoy • 101,333 miles

I changed the spark plugs out in my envoy one at a time because it has individual coil packs on it and I dint want to get them crossed up. After changing the plugs I tried to start my truck and it would not start. I then checked each coil pack to make sure the connection was good and tried to start again, still wouldn't start. I then put the old plugs back I to make sure the plugs that I had purchased was not a bad set of plugs and it still will not start. What will cause that to happen.
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Corytaylor2908
November 10, 2012.



Look around all the area to be sure that you did not leave any connectors undone. Start there

Roy

ASEMaster6371
Nov 10, 2012.
Everything is connected.

Tiny
Corytaylor2908
Nov 10, 2012.
You need to verify spark and fuel pressure.

Shoot some starting fluid in the air filter to see if it starts

Roy

ASEMaster6371
Nov 10, 2012.