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Prev Professional Automotive Repair Technical Discussions for July 16, 2014
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Open Help Requests for GM
Help Request Answers
2002 Cadillac DeVille 4.6L battery VIN: 1G6KD54Y12
vehicle has a severe parasitic draw. drawing 5 amps. i've located 2 fuse boxes. one under rear seat cushion and one underhood. i've pulled each fuse of each fusebox with no change to the 5 amp draw. i've pulled the circuit breakers and relays and had the same ...
1996 Chevrolet C2500 Suburban 6.5L Dome Lamp VIN: 1GNGK26F7T
Hello folks, My problem is the center (middle)overhead dome lamps are inop. Front driver's overhead lamps and lower door lamps working fine. The overhead fixture has two map lamps with a center door open illumination lamp. None of these work. I removed fixture...
2001 Chevrolet S10 4.3L abs VIN: 1GCCT19W11
New abs moduel, tire reset and auto bleed done. No leaks no issues with new moduel except this,,, when normal stop, no slide of any kind abs pump activates in last 2 or 3 feet of stop, when breaking hard does not activate. Verifide tooth count on exciter rings...
2001 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K81
This car came in with a P0336 crank sensor fault. Followed the procedures and found bad ign. wires so replaced them and plugs. Also one coil that showed some damage at one of the towers. After this cleared codes and the code returns right away. (Second start u... Trouble codes: P0336 (Crankshaft position sensor A circuit range / performance)
2003 Chevrolet Express 2500 5.3L No Start VIN: 1GCFG25T13
I have a real hair puller here. This van is a cranks/no start. Security telltale DOES NOT illuminate. No DTCs in ECM or BCM. Can communicate with all modules. Can command telltale on in IPC. Passlock cyl. voltage = 3.2 volts. ECM shows VTD fuel enable=No. All ... Trouble codes: U1000 (In SDM Class II data link malfunction)
2004 Chevrolet Tahoe LS 5.3L Battery VIN: 1GNEK13Z84
This vehicle has a parasitic draw. This first and most easily remedied is the radio, which is drawing about 2 amps at all times. My primary question is this: How long should the BCM be drawing any amount of current? I tend to follow the 50 milliamp maximum...
2006 Chevrolet Silverado 2500 HD LS 6.0L Steering VIN: 1GCEK19B66
I ran a check list of all the front end parts associated with this issue including the steering column / intermediate shaft. The left front toe was slightly out of adjustment but did not make a difference. Any help would be appreciated, thank you for your time...
2008 Chevrolet Equinox LTZ 3.4L MIL Lamp on VIN: 2CNDL33F28
Thanks in advance to everyone taking the time to read this one. This Equinox belongs to the wife of the manager of another shop we work with daily, so we'd like to see a fix. I know, it's long, but stay with me! A few weeks ago, the owner brings me the vehicl... Trouble codes: P0404 (Exhaust Gas Recirculation EGR Open Position Performance), C0561 (Invalid Serial Data Received English Theres a powertrain code stored in the PCM go fix it)
1992 GMC C3500 Sierra SLE 7.4L tcc VIN: 2GTHC39N4N
The problem with this truck is the computer at highway speeds turns the TCC off and on causing a surge and engine speed fluctuation. This customer brought this truck to us after several other shops. To try to correct the problem he has replaced the transmissio...
2004 GMC Envoy SLE 4.2L no start VIN: 1GKDS13S34
this envoy wont turn over from ignition switch. have power on all wire coming out of switch. I don't have power on both terminals at starter relay, just one,yellow wire, and no ground when turn switch. I can start from relay and will run. checked purple wire a...

Fixes & Summaries for GM
Fix/Summary Answers
2010 Buick LaCrosse CXL 3.0L Starting VIN: 1G4GC5EG0A
Still could not duplicate problem-owner is going to remove cell phone charger and try putting the fob in the console when problem occurs as suggested by others-I will update if we come to a conclusion-thanks for the helpful replies
1999 Cadillac Escalade 5.7L a/c compressor VIN: 1GYEK13R9X
first of all thanks for all the replies i found wire 459 permantly grounded causing compressor to run all times removed ground no comp operation checked vcm operation i have no ground command checked pressure switches found high pressure switch bad jumped swit...
2001 Chevrolet Silverado 1500 5.3L knock sensor VIN: 2GCEK19T51
this truck is fixed. let me start by saying that everyone that said to get the aftermarket parts out was correct. there was only one code for the rear sensor when we started this mess, after the "new" parts were installed was when both codes came up. now that...
2001 Chevrolet Express 2500 5.7L No Start VIN: 1GCGG25R41
I installed another cap and rotor. Also tapped on converters and muffler and heard pieces rattling around inside. Tried to start van and it fired right up and blew pieces of converter out tail pipe. Thanks for the help. Will install new converters and muff...
2002 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNEK13Z72
I have a trainee on this job.I found a faulty injector pigtail on Cyl. #3 . This caused the P0200 injector control circuit.Runs slightly better but this problem has been ongoing for a long time as I found A new coil and injector from another garage repair.Thi... Trouble codes: P0300, P0200.
2002 Chevrolet Express 2500 5.7L smog monitors VIN: 1GCGG29R92
yes I want to say I learned a lot from this one one of you asked me which monitor has to run first yes the 02 heater anyways as soon as I read how to get it to run all the other monitors ran on the gas side but still wont pass smog because no one could really ...
2007 GMC Yukon XL 1500 SLE 5.3L compressor VIN: 1GKFK16337
Well folks, every once in awhile I have to own up to a mistake. Yes, I did overcharge it and I think it was my screw up and not the machine. I will be cautious though and probably will not trust the machine as much. Thanks to everyone that chipped in their tho...
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