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Prev Professional Automotive Repair Technical Discussions for March 10, 2010
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Open Help Requests for GM
Help Request Answers
1991 Chevrolet Camaro RS 3.1L MIL Lamp on VIN: 1G1FP23T9M
Vehicle sat for three years. Came in needing a fuel pump. Replaced pump and it started. Would run but die. We found the computer was bad (tap test). Replaced using the same mem-cal(prom). Doesn't die out now, but the check engine light comes on after a bout 10... Trouble codes: 43 (ESC Circuit)
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1996 Chevrolet Lumina 3.1L Excessive Emissions, NOX VIN: 2G1WL52M4T
this car failed the california smog test (asm) for nox at both the 15 & 25 mph tests (616, 808 ppm). i have checked the egr system, catalyst, you name it i think i have checked it. although i am obviously missing something. i even got to the point of throwing ...
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2001 Chevrolet Impala 3.4L Starting VIN: 2G1WF52E31
the car will not start and run unless slight pressure on gas pedal.tried mass air flow sensor ,tps and fuel pump after it is running you can take your foot off the pedal and it will idle
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2001 Chevrolet Tahoe LS 5.3L goes to neutral and then stays in 4th gear VIN: 1GNEC13T51
the transmission has been rebuilt ,it came in and we check wiring harness for any short to ground or power or and open wire in harness.nothing found.the shift solonoid 2-3 checked out good with verus command on and off.anyway replace pcm samething.so took off ...
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2004 Chevrolet Silverado 1500 LT 5.3L Drive-axles VIN: 1GEK19T84E
This truck has baffled,we replaced front and rear diffs and as you drive in four wheel high tires seem to be fighting each other,the rear diff has 3.73 gears,this what the mfg calls for and the should be the same,however with vehicle on a lift in 4 wheel drive...
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2007 Chevrolet Tahoe LT 5.3L MIL Lamp on
No VIN at the momment, truck at work and I'm home. Short history. I replaced all lifters about 2k miles previous due to a couple collapsed(active fuel mngt). Cust has returned w/ mil on and p0171, lean bank 1. Have verified and duplicated twice now. Bank 1 wil... Trouble codes: P0171
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2007 Chevrolet Suburban 1500 LS 5.3L Cuts out, VIN: 3GNFK16347
What I have is a Suburban that goes completely haywire on a cold start up until warm. Under acceleration the engine will loose all power, the door locks will cycle rapidly, the tach and speedo will drop out, the other gauges will fluciate, the suspension & abs... Trouble codes: C0561 (EBCM Invalid Seral Data)
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1991 GMC K1500 Sierra 5.7L Idles high in gear VIN: 1GCDK14K4M
New GM rebuild engine install. Do not know if problem was there before do to poor running and misfires. When vehicle first started idles ok. IAC counts are high about 50 counts. Put into gear rpm drop to about 600-700rpm and then start climbing to 1000rpm. IA...
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2002 GMC Envoy SLT 4.2L cam actuator VIN: 1GKDT13S82
I have an idea of what might be wrong here but I wanted a second opinion before I start ripping this engine apart. Vehicle came in with to codes stored and a complaint of lack of power. Codes were p0014 and a failure to reach coolant temp code. On test drive r...
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2002 GMC Envoy SLE 4.2L speedometer/ABS VIN: 1GKDT13S82
Hey Gm guys, I have a 2002 GMC envoy with a co236 co237 trouble code. (rear wheel speed signal missing & rear wheel speed signal erratic.) At first I figured Throw a VSS. at it. Seemed like a good place to start. After installing a new VSS The test drive was g...
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2004 GMC Envoy SLT 4.2L transfer case VIN: 1GKDT13S74
Dear fellow techs, We are looking at a gmc envoy with no external fluid leaks. the transfer case fluid is very low and the transmission fluid is to high. has anyone seen this problem and what the repair is? thanks mh
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2006 GMC Envoy Denali 5.3L 1-2 shift VIN: 1GKES63M36
this one seems simple but we replaced the input speed sensor on the frt pump and cleared the code, same problem!!! our 2 scan tools will not communicate and give us a trans datastream so im wondering if there is pcm/wiring isssue, we can read and clear codes t...
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2007 GMC Envoy SLT 4.2L light VIN: 1GKDT13S77
replaced faulty lr senser and did a complte relearn.light was of until i drove half a kilometre.now light is on steady with no codes anywhere.can not turn light off except when commanded throgh inst. cluster.please help me .
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2002 Oldsmobile Alero GL 2.2L Fuel Gauge, Temp Gauge VIN: 1G3NK52F12
The customer has returned this car to us for the third time. She states that the gas gauge works erratically intermittently and the temp gauge reads near hot intermittently until she turns on the heater then the gauge reads about half way. We have not witnesse...
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1994 Pontiac Trans Sport 3.8L Surge, Stall, MIL Lamp on VIN: 1GMDU06L9R
need help with this van,intermittant stall,replaced egr valve for problem,seemed to improve,stall but has an idle surge and o2 sensor volts hang at .438 millivolts will go to closed loop,while driving but fuel trims jump to 180 while driving.replaced o2 sensor... Trouble codes: 134 (o2 sensor circut open)
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1995 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE55M1S
We are a Ford dealer and doing this for a friend so I lack experience on this. Engine acts like it might start but doesnt. I have plenty of spark. I have 12V to the injectors but no injector ground pulse. I tried the original ECM with no change. Could the ... Trouble codes: C0DE?
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2004 Saturn Ion-3 2.2L transmission VIN: 1G8AW12F24
This vehicle came in on the hook, with no prior repair history, The customer stated that it slammed forward and the trans lite came on and now wont go over 30 mph. I scanned the car with P1882 ratio control perf in the trans, and O0646 ac clutch relay circuit ...
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L horn VIN: 1G4CW52K6S
Thanks as always for your help. The horn problem was the clock spring. However the gas door , the door locks and trunk relase fuse blows . Turns out the relay for those things is under the seat. The car had been left at a bodyshop with the windows down. Water ...
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1999 Buick Park Avenue Ultra 3.8L Serpentine belt VIN: 78YTRRRREE
Thanks fellows, i dont know why this one was such a cat, we removed all the bolts and spacers and got the belt off finally, i dont know why this one was so different to the other 3800 models that we have done, i generally just drop the lower bolt and spacer an...
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2002 Buick Rendezvous CX 3.4L gauges, dash lights, exterior lights VIN: 3G5DA03E32
Thank you all for the replies. I hate when this happens but we never had the chance to complete the repair. Customer was from out of town & had to get home. In answer to some of the replies, the BCM was new, not reman. I had also installed a new ignition switc...
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2000 Cadillac DeVille DHS 4.6L Cuts out VIN: 1G6KE54YXY
FIRST OFF THANKS FOR ALL THE HELP.I TOOK THE ADVICE OF LIEN AND MARK AND PULLED INTAKE TO CHECK BOOT BETWEEN INTAKE AND TBI, FOUND SOMEONE USED SILICONE ON INTAKE O-RING AND RUBBER BOOT, SO I REPLACED INTAKE O-RINGS AND BOOT. NO LUCK PROBLEM STILL THERE. I THE... Trouble codes: P0101.
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2000 Chevrolet S10 4.3L upper bushings VIN: 1GCCS19W8Y
Thanks for the info,I had to knock out the bolts and remove the upper control arm as you all sujested. there is just no way of doing it without the 2 bolts removed. Took me about a hour to do the job and the bolts came right out after hitting it with the air g...
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2000 Chevrolet Express 2500 LS 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GCGG25R1Y
HI, GUYS THANKS A LOT TO ALL OF YOU FOR RESPONDING TO MY REQUEST FOR HELP, I HAD TWO PROBLEM!! INTAKE MANIFOLD LEAK AND BAD VALVES SPRING , IT`S ALL GOOD AND RUNNING GREAT NOW. THANKS AGAIN MATT Trouble codes: P0102 (m.a.f sensor), P0141 (o2 sensor b1 s2), P171, P0174 (bank 2 lean), P351.
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2002 Chevrolet Astro 4.3L alternator VIN: 1GNDM19X52
Well, it's fixed. Spent money for new alternator instead of reman. I finally found that terminal 52 (field) and 15 (L) are the numbers at computer. I had stated that the B+ terminal was hot and I needed the number of the terminals at the computer. I connec...
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2002 Chevrolet Silverado 1500 5.3L Accessories VIN: 1G24KEEFUW
thanks for all your help the ignition switch was the culprit.
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2003 Chevrolet Silverado 2500 HD 6.0L Oil pressure VIN: 1GCHK24U43
Thanx for for all the help guys! We ended up taking oil pump off again and disassembled it for inspection(again). Nothing looked damaged and pressure relief spring looked fine. However, when looking into bore where relief valve sits there was a lot of metal...
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2003 Chevrolet Express 3500 6.0L passlock VIN: 1GCHG35U43
Thanks for all the input. This was a fleet vehicle and the owners said, as long as the vehicle starts, do not proceed to fix it unless it will not start every time.
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2003 Chevrolet Impala 3.8L body control VIN: 2G1WF52K03
Well everyone thanks for all of your suggestions. The car is fixed. It ended up being a defective replacement Bcm that I purchased from a dealer. After all the hours I spent checking and rechecking components, connections etc. I decided to replace bcm ag...
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2003 Chevrolet Silverado 1500 LS 4.8L vibration VIN: 1GCEK14V73
thanks to evryone who responded, replace drive shaft problem gone appparently it was bent, ujoints were so so, thanks everyone esp the gentlman from indiana
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2006 Chevrolet Uplander LT 3.9L Hesitation, Surge VIN: 1GNDV33116
Well I appreciate all of your inputs but the customer has yet to bring the vehicle back. If the customer does and I fix it or find new information I will post it here. Thank you all again! Trouble codes: P0011.
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2006 Chevrolet C5500 Kodiak C5C044 8.1L Cuts out, MIL Lamp on VIN: 1GBEC1G16F
i replaced the connector and throttle body... i took the plug apart and found corrosion in the connector... Trouble codes: P2135, P1516.
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1993 Oldsmobile 88 Royale LS 3.8L No Start, Surge, Stall VIN: 1G3HN53L8P
Thanks for all the help the ect was reading -14 degrees on cold soak thanks again
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2000 Oldsmobile Silhouette GL 3.4L obd ii VIN: 1GHDX13E4Y
The problem was not with the car or its computer but with the new OBD II inspection program that has started in NJ. The software for the new program is in the Beta phase and is failing cars that have "unsupported" Continuous Readiness Monitors. We did not look...
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1996 Pontiac Bonneville SE 3.8L Blend door VIN: 1G2HX52K8T
The used programmer was bad. Thank you to all that replied.
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2003 Pontiac Grand Am SE 3.4L instrument cluster VIN: 1G2NW52E23
Thanks for the help guys- we were over analizing the situation.It has a faulty instrument cluster AND a bad BCM. The customer had us repair the instrument cluster and will wait for the BCM repair untill he has more funds. Thanks, Greg
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