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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 1, 2009
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Open Help Requests for GM
Help Request Answers
1991 Chevrolet K1500 Cheyenne 5.7L 4x4 fuse VIN: 2GCDK14K8M
A Friend brought this truck to me this morning. Said 4x4 went out yesterday. Truck is blowing 4x4 fuse as soon as 4x4 is engaged. Am letting truck melt out (ice in chassis) before I start crawling around under it! I'm going to start by unplugging the front axl...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac Fleetwood 4.9L Misfire VIN: 1G6CCB53B4
I did a very thorough scope check #s 6 and 7 seemed to be the cylinders causing the problem, I retraced all the items I had done earlier and nothing changed. I pulled the intake manifold and inspected the gaskets etc.. I thoroughly inspected all the distribute...
2002 Chevrolet Trailblazer LS 4.2L Heater VIN: 1GNDT13S72
Thanks to all who responded to my request on heater problems on the Chevrolet Trail Blazer. I replaced the left heater actuator that I got from a GM dealer. I still had problems with erratic operation of the heater only on the left side. I tried the manual me...
2002 Chevrolet Tahoe LS 5.3L Surge, Misfire, MIL Lamp on VIN: 1GNEK13Z42
As many of you had suggested, the fuel pump was the culprit. I did some further testing by closing the return line off to see if the pressure would increase and it did to 70psi. That result really had me shying away from the pump. Since it was an aftermarke... Trouble codes: P0300 (Random Multiple Cylinder Misfire), P0301 (Misfire cylinder 1), P0303 (Misfire cylinder 3), P0430 (Right cylinder bank catalyst below efficiency).
2004 Chevrolet Monte Carlo SS 3.8L washers VIN: 2G1WX12KX4
Thanks for all the help. The problem was the nylon hose from the pump to the wiper arms had an internal check valve that at times would stop flow.Hose looked fine? Weird.
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