Hi all,
New to the forum, I am normally a diesel dude. My wife's 2002 Tahoe, 5.3L is throwing a cylinder 1 misfire. I suspected the wires/plugs, and replaced them. It has 99K on it anyway, so no biggie. No fix. Then, I swapped 1 and 3 coil packs, still no fix, and still throwing the code. It...