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Prev Professional Automotive Repair Technical Discussions for January 6, 2011
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Open Help Requests for GM
Help Request Answers
2011 Buick Lacrosse 3.6L SDM module VIN: 1G4GC5ED6B
We have been able to set up the SDM with the Body control module but we seem to be unable to program the SDM itself. The Tech 2 indicates that progamming is required and when the program button is pressed nothing happens. We have the tech 2 and access to the G...
1999 Cadillac Seville STS 4.6L heater/eng temp VIN: 1G6KY5492X
Hello people This caddy has got us stumped. Sitting in bay running eng temp and heater output normal Driving level roads all normal Climing a hill eng temp pegs and heater goes to cold air It seems like it is low on coolant but we tried pulling top hose to...
2006 Cadillac CTS 2.8L Airbag Light on VIN: 1G6DM57T16
The airbag light is on. had codes B0092 (problem with the PPS system) were checked all wires from the SDM to the PPS and found no problem. We thought the problem was the PPS Module assembly. We replaced it. Now the Airbag light is still on and the same B0092 c...
2000 Chevrolet Corvette 5.7L Stall VIN: 1G1YY22G6Y
Heres one for all you corvette guru's car came in as an emissions failure with o2 codes and p0430 cat ineff codes and rich mixture codes. I replaced all o2 sensors since they were original with 230k i couldn't believe it. After that i got to codes for both ups...
2005 Chevrolet Silverado 1500 5.3L Poor Fuel Economy VIN: 2GCEK13T75
Hey Guys. I have my own 05 silverado with 5.3L Vin T. I have only 13-16MPG average, but no drivability problems and its driving me nuts. Have a K&N but I use as little oil as possible. And A new MAF Sensor recently anyways. Have done Plugs, Throttle body Scrub...
2007 Chevrolet Silverado 1500 Classic LS 4.3L Key In Ignition Audio Warning VIN: 1GCEC14X57
Good day to all and let me begin by saying thanks for any and all help on this matter. First off this a used car that I am dealing with, trying to fix an issue with the audible chime that is supposed to occur when the key is in the ignition, there isnt one. Bu...
2001 GMC W3500 Forward W3S042 5.7L Hesitation, Misfire VIN: 4KDB4B1R51
Truck starts ok cold starts to run worse the hotter it gets. Checked for vacume leaks found none. fuel pump 52 psi idle. It appears to be running lean on bank 2 any body seen this before? Thanks for any help. Trouble codes: P0468
2003 GMC Envoy XL SLT 5.3L Misfire, MIL Lamp on VIN: 1GKES63M58
I have a 2003 gmc envoy denali with a 5.3 liter. Truck came in with a p0300 code. Looking at the misfire counter #5 cyl had aver 15,000 misfires with all other cylinders in the teens. I have swapped the coil,plug and injecters with other cylinders but the prob... Trouble codes: P0300 (Random misfire)
1978 Oldsmobile Omega 3.8L choke heater VIN: 3B69A8W109
Need more info on choke heater circuit. I have wiring diagrams that don't seem to exactly match the vehicle. Have tried 1 or 2 years either direction(same). With choke wire disconnected, batt volts. Connected, 1 volt. Need to know how circuit opperates. Found ...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L Traction Control VIN: 3G5DA03E22
Because of the history of wiring on this vehicle, the next day we just rechecked the neutaral saftey switch, we found a bad ground wire just like all the other wires that were fixed, moving the harness in that area compromised the wire. This brought the indica...
1992 Chevrolet K1500 Silverado 5.7L Poor Fuel Economy VIN: K3N1205835
Thottle body was just leaking & original(seeping fuel & sucking wind).Fuel presure was low @ 11 PSI.Warren from Hawai suggested summit racing .com. It came complete with every seal , O- ring , & pressure reg.Increased fuel pressure to approx. 14 PSI & fuel is ...
1999 Chevrolet S10 2.2L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCCS1447X
Thanks IATN. This truck is fixed! Thanks for all the great responses. I replaced the ECM with a used and had it flashed. the fuel trims returned to normal and power returned. Thanks again for all the great help. Trouble codes: P0300 (Random Misfire).
1999 Chevrolet Malibu 3.1L Surge, Misfire VIN: 1GDC1XTJ1Y
Alright, so after replacing the grommet at the B1 breather hose the LTFT was still at -10%. The oe plug wires helped to clean up the 2ndary ign. waveform as far as interference is concerned, but the turbulent burn slope was still too excessive. Next I measured...
2001 Chevrolet Impala 3.8L fog lights VIN: 2G1WH55K91
well its no wonder gm went belly up. anyway the car had several problem with the for lights. thanks for the input on using the scaner to check inputs. . the bcm was getting a comand for fog lights on but still did not work . using the trouble chart we un pluge...
2006 Chevrolet Equinox LT 3.4L No Start, MIL Lamp on VIN: 2CND163F06
Thanks you guys. SORRY it took so long to answer,I sent this one on down the line. The theft light did come on and go of very quickly no flashing. THe U code was U2015 I posted it wrong. I NEVER SAW any VATS info on Modis... NO PID that I could find in ECM or ... Trouble codes: U2105 (Loss of pcm/ecm to bcm), P0230 (Fuel pump control circuit), P0480 (Low fan control circuti), P0645 (A/c control circuit).
2002 Pontiac Bonneville SE 3.8L charging gauge VIN: 1G2HX54K92
thanks to all that that offered help, we had to replace ecm module, computer was not shutting down alternator and so was always at full charge, car has been driven a week and all is working good.
2009 Saturn Aura XR 3.6L park/running lights VIN: 1G8ZX57749
The assumption by me and the one reply I recieved (Thank You Mike) was that the accident had damaged the wiring. As it turned out, the BCM was faulty. It was providing a direct short to ground through connector J3 terminal A7. The BCM commands the running lig...
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