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Prev Professional Automotive Repair Technical Discussions for April 24, 2014
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Open Help Requests for GM
Help Request Answers
2003 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K83
Upon initial inspection we observed NO codes in the computer, we could not duplicate the dieing issue. It did have a hard start (long crank). The pid for crank sensor showed around 12 rpm at all times (give or take 5) running or not. We replaced the crank sens...
2004 Cadillac DeVille DHS 4.6L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G6KE57Y54
First I would like to thank you for your time... original customer complaint was that the engine would just die with no warning while driving. had another so called mechanic work on it and actually made it worse. found one bad coil and another unplugged causi... Trouble codes: P0102 (Mass Air Flow MAF Sensor Circuit Low Frequency), P0107 (Manifold Absolute Pressure/Barometric Pressure Circuit Low Input), P0121 (Throttle Position Sensor 1 Performance), P1107 (MAP Sensor Circuit Intermittent Low Voltage)
1994 Chevrolet S10 Blazer Tahoe 4.3L First gear VIN: 1GNDT13W1R
Vehicle will occasionally start off in second gear especially cold. After it moves a few feet or so it will go into first. The shift points, lock up, etc are all perfect after that.I was thinking a governor or solenoid problem, but I wanted to get some input ....
1999 Chevrolet C1500 Suburban 5.7L Crank Relearn VIN: 3GNEC16R9X
We replace the VCM because the original VCM had no serial data output at terminal 11, Connector 4). After VCM replacement, serial data was restored but unable to perform Crank Relearn. I tried 3 different VCM with no success. The crank and cam sensor produces ...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac CTS 2.8L No Start VIN: 1G6DM56T25
I would like to thank all of those that responded to my request.In my research, I have found there is a difference in the years, for this particular engine...I'm not exactly sure of what it is, yet. The engine I got was out of a 2007 and my car was a 3005. Eve...
2006 Cadillac CTS 2.8L Power steering VIN: 1G6DM57T16
Ok, sorry for the delay but the customer has stated that the vehicle has not acted up for the last three weeks. My next steps will be pressurizing the tank and checking for leaks and then replacing the tank due to the loose internal components. Wish I had mor...
1996 Chevrolet Blazer 4.3L Ignition and Fuel Pump operation VIN: 1GNDT13W9T
Hello, As usual we sort out mis-information. The questions I asked - Were about the wires that are attached to the alternator battery terminal stud. The answer is that the two wires that are there - are powering up circuits inside the vehicle. Removing those...
2003 Chevrolet C4500 Kodiak C4C042 6.6L speedometer VIN: 1GDC4E1113
ck speed sensor going into tcm and coming out same frequency tcm was processing seed right but ecu was not replaced ecu had to reprogram fixed my concern thanks everybody
2002 Pontiac Grand Prix SE 3.1L Temp Guage VIN: 1G2WK52JX2
this car is fixed. some stated a problem in the wiring, in the pcm. many stated it was a sensor on the head with a green wire. according to the vin to the dealer, this car does not have a sensor dedicated to the guage. this guage reads off of the 3rd wire ...
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