2005 gmc envoy code p0301

[jake22]

hello my 2005 gmc envoy is stuttering at idle, code # p0301 indicates mis fire cylinder#1. can i replace the spark plug for that cylinder? does anyone know where to get a diagram of the engine?

 

[Molson02536]

hello my 2005 gmc envoy is stuttering at idle, code # p0301 indicates mis fire cylinder#1. can i replace the spark plug for that cylinder? does anyone know where to get a diagram of the engine?

Common for the throttle body to get gummy with carbon that can cause the issues your have posted. Start with the simple and clean your throttle body, post me back and we can got from there.

 

[fisherman563]

Any other update on this. I have a 2005 envoy with the same P0301 code. changed the plugs and put in a new coil. Still have the issue, next I took out the throttle body and cleaned that and while I was at it switched coil 1 and 2 even though I put a new coil in 1just to see if the new coil was the problem. Still have the same issue code P0301. Any thoughts as to what to try next? Thanks for any help.

 

[donald w long jr]

it's probably the coil pack when i did mine to verify it was the #1 cylinder i swap out the # 3with # 1 cleared the codes fault came back saying it was # 3 bad there expensive