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Prev Professional Automotive Repair Technical Discussions for October 14, 2013
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Open Help Requests for GM
Help Request Answers
1995 Cadillac DeVille Concours 4.6L Starts in 2nd gear - Shift solenoid A VIN: 1G6KF52Y4S
This old Cadillac is not making sense to me. I can get a 1st gear start to begin with, but will then start in 2nd after initial drive cycle. It will begin in first if I cycle the ignition again or I put into self-diagnostic mode. My question is this, I have re...
2005 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y65
Our problem is to try and solve intermittent harsh shifting. We have code P0172 which indicates throttle position sensor 1 circuit short/low. Testing verified that TPS is good but that we have no 5 volt reference coming out of computer pin#8 at connector 2 of ... Trouble codes: P0172 (Throttle Position sensor circuit low/short), P1811 (Max. Adapt and long shift)
1995 Chevrolet C3500 Cheyenne 6.5L No Start, Cuts out, Stall, MIL Lamp on VIN: 1GBKC34F4S
Customer brought me this diesel truck, says every now and then will shut off on him, usually starts back up. Sometimes it will run poorly and have no power, other times wont start at all. Did have the 2 codes in it. I havent verified his concern but he says it... Trouble codes: 36 (Injection Pulse width error long responce), 35 (injection pulse width error short responce)
2007 GMC Acadia SLT 3.6L Camshaft VIN: 1GKER33797
Just looking for a little more information before I tear into this motor. Has a few codes in it P0172& P0175 both system rich codes, P0300 (we all know this one) P0366 Exhaust cam position sensor performance B1 and P0496 Evap system flow during none purge. My ...
1995 Oldsmobile 88 Royale 3.8L Starting VIN: 1G3HN52K3S
Vehicle came in with a crank and not running issue. it will start for like a second or two and it will stall right away, sometimes i can get it to run normally and it will run for a while and after four times or just letting it seat for a while it will act up ...
2001 Oldsmobile Silhouette Premiere 3.4L Heater Drain VIN: 1GHDX03E71
Carpet wet on the drivers side

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Limited 3.8L compressor shuts off VIN: 1G4HR52L1R
Well salvage yard told me 1992-1994 a/c programers were interchangeable. I put a 1993 programer in and apparently they were wrong and 1994 is part number [...]. Tech hotline says this is causing my problem. As I stated, compressor does not cycle and refrige...
1995 Buick Century Special 3.1L Excessive Emissions VIN: 1G4AG55M5S
Thank You for all the replies. We fixed the vehicle with a fuel injection cleaning. I was not able to test fuel trim at the different speeds. I had performed a top engine clean before the inj. clean but that didn't help so I didn't think cleaning the injectors...
1993 Chevrolet C3500 Silverado 6.5L Overdrive VIN: 1GCGC39F5P
This one is out the door. Most answers mentioned taking care of the TPS codes first. Interesting fact is that you had to access the codes through the transmission portion of the scan tool. There was no way to access them from the engine menu. It takes a specia...
1995 Chevrolet Impala SS 5.7L Poor Idle Quality VIN: 1G1BL52P9S
Ended up replaceing the egr valve and it corrected the problem. The old valve was stuck open pretty good. Thanks For all the info..
2001 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W61
what a long strange trip this has been,, thank you all for your help.. the fix was aonther new coil.. i dont understand why though, i removed the plug wire at the plug, installed a spark tester, spark would jump half inch, which should be enough to jump a s...
2002 Chevrolet Tahoe LS 5.3L Compressor VIN: 1GNEK13TX2
Upon the recomendations of many, I evacuated the system, pulled the orifice tube out, found that it was 100% plugged, removed the condensor and checked it and it was done, I replaced the condensor, orifice tube, flushed and backflushed all lines and evaps, ...
2005 Saturn Vue 2.2L Trans. Shift VIN: 5GZCZ33D65
OK sorry to wait so long to close but these folks took their car home early on after my looking at it with intention of returning it to try a used TCM if we could find one & they called me last week & said they decided to take the car to Auction as it was. ...
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