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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 12, 2013
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Open Help Requests for GM
Help Request Answers
2004 Buick Century Limited 3.1L no communication VIN: 2G4W552J14
Client drove vehicle into parking lot, several issues going on; Gauges all at 0 or bottom, radio inoperative with a thumping noise coming from the dash, RED Brake lamp on in cluster, shift indiactor is showing the "D" with a circle around it, no matter what ge...
2003 Cadillac CTS 3.2L MIL Lamp on
code p1904 does anyone know what this code is comes up under pending codes Trouble codes: P1904
2006 Cadillac SRX 3.6L Steering Pump VIN: 1GYEE63736
Hello first of all just want to say thanks already, i have a 06 cadillac srx with no power steering, check the pump and it is not working. So replaced it, and it works then after 15 min and customer went to the highway and then came back with no power steering...
1990 Chevrolet Corvette 5.7L Poor Idle Quality, Surge VIN: 1G1YY3384L
Thanks in advance for the help. As you can see I have done a lot and am not sure where to go next. The engine sounds good mechanically, no ticking or knocking sounds, it does however smell extremely rich as one might expect with block learn maxxed in the rich ...
2000 Chevrolet Impala LS 3.8L starter & dash lights VIN: 2G1WH55K1Y
Got this peach of a problem with this car. The car will not crank/start but when turning the key to the off or taking out (wait 5 seconds) the instrment light flash (ABS, red brake, air bag and battery) and the car gose into a cranking mode. turn the key back ...
2007 Chevrolet Silverado 1500 Classic WT 4.3L distributor VIN: 1GCEC14X77
PO300 DTC "misfire detected" in memory. Vehicle presented with extended cranking period but would eventually start after 6 or 8 attemps however, after partial warm-up severe misfire set in at a steady 1,500 to 1,800 steady rpm's @ no's 3 & 4 but would clear up...
2007 Chevrolet Silverado 1500 Classic LT 5.3L Surge, Stall, MIL Lamp on VIN: 1GCEK19Z57
Thanks for your time reading this. This truck will intermittently stumble and run rough, will not accelerate and may stall, and the CEL comes on immediately. It might do it twice a week, and may not do it for 3 weeks. It has never done it with me, only the cus... Trouble codes: P0101 (MAF out of range), P0106 (MAP or BARO out of range), P0128 (coolant thermostat)
2007 Chevrolet Silverado 2500 HD Classic LT 6.0L Hesitation VIN: 1GCHC24U47
This truck originally came in with a code P0174 too lean bank 2. I replaced the b2s2 o2 sensor when I saw a reading of 0 volts intermittently on scan tool. Cleared code and drove to complete monitors for smog check and code P0420 cat efficiency code came on. I... Trouble codes: P0420 (Cat sys efficiency below threshold bank 1), P0174 (Too lean bank 2)
2011 Chevrolet Silverado 2500 HD LTZ 6.6L Airbag light on VIN: 1GC1KYE84B
New SDM is programed, but cannot clear 2 remaining codes. They are B0016-OE and B0023-OE, both for roof rail air bag, left and right, which both did deploy during accident. I have followed PPT, tested control circuit terminals for resistance, voltage, from air...
2012 Chevrolet Silverado 3500 HD LTZ 6.6L Won'T Run Sometimes VIN: 1GC4K1C89C
Vehicle travelled 10,500 miles with no complaints or issues-none at all. Came it because customer said it lost power and lights were flashing. On checking out the problem we found that the HVAC stopped, abs light came on, no response from throttle, all cluster...
2004 GMC Envoy SLE 4.2L all gears VIN: 1GKDT13SX4
Truck came in and customer said there was no reverses some times and no drive. All so stated the PRNDL was not working properly and some time revers is drive and some times neutral.I tried to get the truck to duplicate the problem with no luck. So i call the c...
2009 Pontiac G6 GT 3.5L Cuts out, Misfire VIN: 1G2ZH57N69
Car has a miss right off idle from about 1200 rpm to 1500 rpm. Feels like a bad spot in the accelerator pedal sensor. Car was taken to dealership to get a software update but they said all is up to date. Hope someone can help.

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac Seville SLS 4.6L suspension VIN: 1G6KS54YX3
thanks guys for the advice. I haven't looked at the sway bar end links. I did check for cracks in the sub frame. vehicle is scheduled back in a few weeks, to re evaluate noise.I will take all your suggestions in great consideration.thanks you with great apprec...
2007 Chevrolet Impala LS 3.5L p0717 VIN: 2G1WB58K47
I had a chance to test a few known good cars today. All outputs matched my problem car. I have ordered a new TCM and feel that will be the repair. I will update if the TCM was not the fix. Wanted to get this closed by the weekend. Thanks to all for your help.
2004 GMC Envoy XL SLE 4.2L Right rear air spring VIN: 1GKET16S54
Since this vehicle is not currently being driven, we had plenty of time to check it for further leaks. Soap tested all lines and bags again and all tested good. This leads me to believe that the problem is a check valve in the compressor. And since it takes a ...
2004 GMC Sierra 2500 SLE 6.0L heating VIN: 1GTHC23U34
The dealer had the blend door accuator so I installed it today. Works like new with plenty of hot air comming out of right and left vents. Can't thank you all enough. I really appreciate your expert help.
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