#1 sparkplug misfire can someone tell what could be the cause of that.

Could be a number of things....what year, engine size?

2000 5.3 votec also gas gage gone wire and lost of power. Z71 4x4
thanks for your help Gm Merlin

Well there are a couple things you can do yourself on that engine.
First, is it still under warranty?
If not, you can swap wires and coils to see if the misfire changes cylinders...2 bolts hold the coil, they are interchangeable..
If you do that and the misfire stays on # 1 cylinder, most likely you have an injector problem.

Well there are a couple things you can do yourself on that engine.
First, is it still under warranty?
If not, you can swap wires and coils to see if the misfire changes cylinders...2 bolts hold the coil, they are interchangeable..
If you do that and the misfire stays on # 1 cylinder, most likely you have an injector problem.
Thank you GmMerlin i'll try that.

Thank you GmMerlin i'll try that.
Thanks GmMerlin it was a broken plug