I have a 2003 Trailblazer EXT with 209,000 miles on it. I have changed the plugs twice every 100,000 miles with no problems. The other day it started running rough and was getting a flashing "Check Engine Soon" light. I ended up finding the #6 coil pack not seated on the plug because the hole for the retaining bolt is stripped out.
I assume the retaining bolt threads into the head. Can anyone tell me if there is an insert or helicoil that goes into it or is the head actually threaded. If anyone can help with any other solutions, it is greatly appreciated.
I assume the retaining bolt threads into the head. Can anyone tell me if there is an insert or helicoil that goes into it or is the head actually threaded. If anyone can help with any other solutions, it is greatly appreciated.