I have the code P0643.Should I replace all of them now or can I replace one for now?
Thanks for scaring me! It will be my first time changing one! I'm getting them from a local shop for $11.65 a piece.I had a thread on here where GM was doing a compression check on my truck for injector warranty (no idea why) but they broke a few of mine off in the heads.
they pulled the cab and replaced heads HAHA be careful