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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 12, 2011
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Open Help Requests for GM
Help Request Answers
1995 Cadillac DeVille Concours 4.6L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G6KF52Y1S
Retreve codes multipal and eratic comunication with pcm checked grounds and powers . All ok exception pcm out puts eratic 5v ref. Replaced pcm and prom good comunication learned idle have code p080 looked at tps high voltage and idle motor was broken replaced ...
1999 Chevrolet C3500 5.7L Stall, Speed data VIN: 1GBJG31R5X
Hi all, Got this truck in the shop doing a lot of wrong stuff. Thought first, check grounds, tightened several, loosened and tightened several, no luck. Speedo shows crazy numbers, 150 when you?re doing 10 etc. on scan tool and variable on speedo. Replaced th...
1999 Chevrolet Silverado 1500 5.3L 2-3 & 3-4 Shift VIN: 1GCFK23T4X
This trans was overhauled about 10k ago. Customer says all was fine until the other day when he parked it then got in it the next day and it now has no 3rd or 4th gear. 1st and 2nd are fine and it feels like it tries to make the 2-3 shift but just stays in sec...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Chevrolet Silverado 3500 6.6L RPM change VIN: 1GCJK33225
With a limited amount of time to work on this truck and properly diagnose the issue the customer simply requested the EGR valve be replaced. The motor is available separately but the cost was almost the same as the whole unit and with the EGR valve already ou... Trouble codes: P0401 (EGR Flow Insufficient), P0404 (EGR Open Position Performance), P2127 (APPS 2 Circuit Low Voltage), P2138 (APPS 1 - 2 Correlation), P2140 (APPS 2 - 3 Correlation), P2563 (Turbo Boost Control Position Sensor Performance).
2003 GMC Yukon XL 1500 Denali 6.0L Blower Motor VIN: 1GKFK66U53
replaced blower module and disconnected battery to reset
1999 Saturn SL1 1.9L Misfire VIN: 1G8ZF5284X
Well looks like everyone but me knows about the intake gasket on these cars. It was bad. I still wouldn't have thought the ECU would shut down the injector when it saw the misfire though, so I'm glad everyone was telling me this could happen. As soon as I s...
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