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Prev Professional Automotive Repair Technical Discussions for January 22, 2010
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Express 1500 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on
Customer complain was no power,rough idle,hard to start and idle. We have found numerous faults with this van, 1st, maf code was repaired, problem was with wiring(pigtail plug)replaced plug and wiring. Found 2 defective spark plugs and arcing from ignition wir... Trouble codes: P0300
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1999 Chevrolet Tahoe LS 5.7L MIL Lamp on VIN: 3GNEK18RXG
Looking for suggestions on my personal truck, I would like to install an electric cooling fan in my truck but dont want to spend $400 for a kit from Jegs. I dont want to have to have a toggle switch to turn the fan on either. Please let me know if anyone has d... Trouble codes: P0420 (catalyst)
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2003 Chevrolet Impala 3.4L passlock VIN: 2G1WF55K13
help hello out there i have a 03 impala replaced ignition lock and switch. now security light stays on will not flash tried relearn nothing. switched bcm out of another impala, sec light will still not flash thanks in advance
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2004 Chevrolet Silverado 1500 5.3L low beam bulbs
Hey all you electrical gurus out there. This ones gotta be easy im just missing it. This vehicle came in about 3 weeks ago. low beam headlamps out. my tech, replaced them , easy right. it came back today light blown again. So i start checking circuits, relays,...
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2006 Chevrolet Silverado 1500 LT 5.3L drivers heated seat
Driver's heated seat come on by itself sometimes. You can manually turn it off.
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2006 Chevrolet HHR LT 2.4L MIL Lamp on VIN: 3GNDA23P26
Very loyal customer brought this vehicle to us with the MIL illuminated, I followed the trouble tree for this code 3 times over & even checked the other possible items after replacing both EVAP solenoids/valves, banging my head against the wall after disappoin... Trouble codes: P0449 (EVAP Canister Purge Solenoid)
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2002 GMC Savana 3500 5.7L No Start VIN: 1GTHG39R32
The van was towed in and on preliminary check had no spark from distributer but good at coil. Distributer cap and rotor were replaced and we then had good spark at plugs. Plugs are in good shape. Still no start. Checked fuel presure. It was in range (I know ho... Trouble codes: P1336, 91638 (testing and results)
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2007 GMC Sierra 2500 HD Classic SL 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTHC24V37
Customer stated after exiting highway Mil came on and engine had no power and was stumbling. Upon receiving vehicle, engine was bucking surging and could smell exhaust was rich. Pulled 2 codes 300 and 101, figure maf code may have been induced by misfiring. Cl... Trouble codes: 300 (Random Misfire), 101 (Maf circuit)
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1990 Other GM llv 2.5L Stall VIN: 1GBCS10E5M
I am trying to find the diagnostic connector to plug my scanner into. I have looked this vehicle over and am tired of searching. Can anyone tell me where to find the ALDL connector?
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Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet S10 LS 4.3L spark plugs VIN: 1GCDT19XXV
thanks for the help i am going to use ngk tr6ix spark plug it is one heat range lower, i found a web site [...].com they had info on supercharging the truck they say one range lower is good for 6 lbs but i will check my self thanks again
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2000 Chevrolet Silverado 1500 5.3L Starting VIN: 1GCEK19T4Y
Thanks for all the help. I did find and fix the problem - it was the cluster not powering down all the time. I had removed all BCM power supply fuses and the tell-tale high beam indicator light stayed on (intermittent). I replaced the cluster and it has been f...
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2002 Chevrolet Express 2500 5.0L No Start, Cuts out, MIL Lamp on VIN: 1GCFG25M52
THANKS TO ALL FOR ALL THE HELPFUL IDEAS AFTER ALL THE WORK INVESTED I GOT TO THE CONCLUSION THAT IT IS A MECHANICAL PROBLEM BECAUSE THERE IS METAL IN THE OIL I'M WAITING FOR AUTHORIZATION TO DO THE JOB. THANKS AGAIN. Trouble codes: 101 (maf), 335 (ckp), 1341 (cam).
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2006 Chevrolet Cobalt LT 2.2L instrument illumination VIN: 1G1AL55F66
Many, many thanks to Ken, Christopher, John, Austin, Ian and Michael!!! All replies had to do with 1 of three things: Ignition switch, BCM, or programming the BCM as per a TSB. Unfortunately, I did not arrive at a conclusive diagnosis due to impatience on t...
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2008 Chevrolet Suburban 1500 LTZ 5.3L Misfire VIN: 1GNFK16398
WELL GUYS THIS ONE IS FIXED. FIRST OFF THANKS TO ALL YOU GUYS FOR THE ADVISE. JAMES WAS ON POINT ABOUT UNPLUGGING THE MODULE IN FRONT OF THE FUEL TANK. THAT DISABLED THE PUMP. I DID CLEAN THE FUEL RAIL. I DOUBLE CHECKED FOR MISSFIRE WITH THE TECH2 AND CYL... Trouble codes: P1175 (fuel trim bank 2).
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2004 GMC Sierra 2500 HD 6.6L Excessive Emissions, No Start VIN: 1GTHK24204
Well thank you to all who replied , We have fixed this truck with injectors. The injectors in question were mechanicaly stuck open. I was not sure on how to eliminate cyl's without tear down due to rust and poss broken bolts but we jumped in and found 2 stuck... Trouble codes: P0046 (turbo boost control position perf.), P0087 (fuel rail pressure too low frp), P1093 (fuel pressure low while power enrich), P1094 (fuel rail low wheel idle or fuel cut), P2229 (baro sensor circuit high).
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2005 GMC Sierra 1500 5.3L starting system VIN: 1GTEK19T55
Thank you very much for your help which directed to the right direction. I had four replies,David [...] An...
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