My 2000 Silverado (4.3 Litre, 137k) is continung to misfire after several trips to my mechanic. Initialy, he informed me that there was a GM service bulletin for my problem which he said was an improperly machined valve guide...$1300 later, it's still misfiring. After I had the work done it was much better, but the problem continued. My mechanic said my plug wires were not in the best of shape and tried to reseat them a couple of times...the misfires continued. This weekend, I replaced the plug wires, distributor cap, and rotor(with quality replacement parts). After all this, it continues to misfire. I am extremely frustrated. (so is my mechanic)
Anyone out there ever heard of this service bulletin, or experienced anything similar? Any ideas?
Thanks,
OkieMike
Anyone out there ever heard of this service bulletin, or experienced anything similar? Any ideas?
Thanks,
OkieMike