I know this may have a thread already, so I'm sorry if I couldn't find it. Dumb question? I.... think so. I have a 93 k2500 with a blow motor. I know that. Was a very bad smoker coming down off the mountain with a full load of firewood. Many trips, good girl! 300 thou on that motor. Mechanic has told me that the ECM caused the problem. Now I have just received this info a few hours ago via a phone call. So I could not verify with a Chev dealer. C'mon, is this really possible? Not that I can imaging so. Been wrenching for 30 yrs and it sound as bull**** to me. I found used chips on ebay for around $70 bucks. He said he has put one in from Chevy at $400. aak. hhmmm. For the total price, with a 90,000mi matching 93 motor, water pump and the usual 'should do's' I'm in for $1800. Now in one sense ok. Get my truck back in fine running shape, she's in quite good condition body and interior wise so it's probably ok to me. Sorry for the run on, just really want to know about the ECM ya know. I would think it impossible for this situation. By the way, this mechanic does some cherry work on full build ups. Appreciate the info guys.