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Prev Professional Automotive Repair Technical Discussions for March 2, 2011
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Open Help Requests for GM
Help Request Answers
1992 Buick Riviera Luxury 3.8L Starter VIN: 1G4EZ13L5N
This vehicle came into our shop almost 2 weeks ago with a customer complaint of no crank. Twice this vehicle has left them stranded but since it has been at our shop it starts fine about 5 times a day for over a week. Customer has stated that when the problem ...
2002 Cadillac Seville STS 4.6L Excessive Emissions, Poor running, ping VIN: 1G6KY54912
Ok, This car came in with a leak behind the water pump crossover housing and 2 codes in the computer. The first code was p0171 the second code was for a dead o2 seson. We replace the water pump, crossover housing and dead o2 sensor. Test drove the vehicle and ... Trouble codes: P1404, P0405
1993 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 2GCEK19K9P
Hi. This vehicle came in with an oil comsumtion issue. No other driveability concerns. Customer decided to replace engine. After that the driveability problems occured. Very doggy and little power as well as a bad hesitation and stumble right off idle. Discove... Trouble codes: 32 (egr)
1996 Chevrolet S10 4.3L Poor Idle Quality, Hesitation VIN: 1GCCS19X3T
thanks for helping. this vehicle brought to us after multiple shops could not repair. thy have tried tune ups and even told customer it was in the trans. the vehicle has no power and very slow acceleration. it acts like a retarded timing issue. we checked the ... Trouble codes: P0300 (Misfire random)
2001 Chevrolet Silverado 2500 HD 8.1L Engine VIN: 1GCHK29G41
Customer complain of oil consumption. Found service bulletin no. 02-06-01-035 and wonderd what the intake bolts had to do with it or should i replace gaskets also? had checked on the bolts and found out that their is a choice with or without pins-any advice on...
2002 Chevrolet Malibu 3.1L Hesitation, Cuts out, Misfire VIN: 1G1ND52J12
This vehicle when you accelerate thru 2000 rpm's and decell and stay at 2000 rpm's it will misfire in all cylinders, i can see the misfires on the modis. No codes are set but deffinetly has a misfire. And it is intermitten. Performed also the crankshaft variat...
2004 Chevrolet Malibu 2.2L Battery VIN: 2G1WF52E14
Battery goes dead after sitting for 3-4 days with no vehicle movement. Have found if unplugging bcm amp draw goes away. Tried new delco bcm same problem. tried new instrument cluster. same problem. Have taken dash & instrment cluster out of interior and inspec...
2004 Chevrolet Silverado 2500 HD LT 6.6L Poor Idle Quality, Surge VIN: 1GCHK232X4
#7 injector fuel injector balance rate runs about +5 to +7 cold and warm about +9. Drive 20 miles and recheck sometimes runs +15 and white smokes heavy out exhaust. Ran cylinder kill and #7 balance event to +3 and all was ok. Now today idle is rough again. Com...
2004 Chevrolet Silverado 2500 6.0L Unknown VIN: 1GCHK29U14
Hello all. Another wonderfull parasitic draw of 140 milliamps killing this DUAL battery truck over a couple weeks. Have isolated to the "SEO B1" 15 amp fuse in underhood block. Removed this fuse and draw is gone to 6 milliamps. This fuse only powers the Ins...
2005 Chevrolet Cobalt LT 2.2L Misfire VIN: 1G1AZ54F95
Help!!! this car is a nasty one. Been in and out of shop with engine missing problem. Every time it comes in it has no spark to cylinder #2 and #3. First time i replaced all spark pluges, ignition coil and ignition module all after market parts. Second time in... Trouble codes: P0171 (Lean codition), P0300 (Random mis-fire), P2119 (Throttle closed position performance)
2008 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: IGCEC19088
Vehicle came in with multiple O2 HEATER CIRCUIT codes for the Bank 1 Sensor 2 Oxygen sensor as well as a p0300 engine misfire code. I never could duplicate any misfires so I replaced the B1 S2 O2 sensor. Cleared the codes and test drove with 2 good ignition cy... Trouble codes: P0036 (O2 heater circuit bank 1 sensor 2), P0054 (O2 heater resistance bank 1 sensor 2), P0138 (p0141-), P0141 (p0300-), P0300 (p2270-), P2270
2007 GMC Canyon SL 2.9L timing VIN: 1GTDT19937
This vehicle came to me from another tech that replaced valve seats. complete valve job with all new components. what I have is a code p0017 cam crank correlation and cyl #1 miss fires. I know this engine was set up without tool for holding cams. I have tool o...
2007 GMC Yukon SLE 5.3L No Start, Trac control VIN: 1GKFC13J07
after test driving multiple times with no returning of trac failure lamp. went to start vehicle and car would not crank--also found no insturment panel operation and unable to communicate with BCM with a scan tool. Tech removed BCm for inspection and look at w... Trouble codes: P2138 (App corelation 1-2), C0242 (Pcm indicataed tcs malfunction), B1517 (Battery voltage above/below threshold), B2615 (Passanger compartment dimming 2 circuit), U0140 (Bcm), U0073 (Control module comm bus off)
2001 Pontiac Grand Am SE 2.4L Cuts out VIN: 162NF52TX1
cylider # 1 missfire @ 2200 rpms. not loosing spark or feul psi. 45 psi feul. compression 150 static. running 105 psi. tryed new coils, coil housing, swaped injector rail. at one time could spray carb clean missfire went away @ 2200 rpms. now the spray of carb... Trouble codes: 301 (testing and results)
2007 Pontiac Montana SV6 3.9L Battery VIN: 1GMDV03157
Vehicle came into shop with supposed dead battery. We got into it and started it. The history is that when the van sits for two or more days the battery will go dead. If jump started van will start all the time until it sits. It has only happened once to us. W...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Chevrolet Silverado 1500 4.8L Stall VIN: 1GCEK19V3Y
After consulting with a Indentifix Tech, I was led to testing at the passlock sensor. While testing I noticed the security light worked intermittently. Suspected sensor so I changed ignition passlock assembley. Security light then worked. Relearned passlock an...
2002 Chevrolet Venture 3.4L Starting VIN: 1GNDX03E92
Thank you to all that responded. While I thought it was possibly a security problem as did some of the responders, it was not. Circuit 540 from the under hood fuse center to terminal C1-20 at the PCM was open. The wire showed corrosion and was broken in two ab...
1997 GMC K2500 Suburban SLE 7.4L output sensor VIN: 3GKGK26J0V
frist thank everyone how replied to my post. went through all trans wirning and checked pigtails again,rechecked all trans sensors,ohmed out the output speed sensor wires they where fine,I also had correct voltage at the sensor so i was safe to say the wiring ...
2005 GMC Envoy SLE 4.2L oil consumption VIN: S532141736
The engine had a stuck ring,I was able to free it up by soaking it with top engine cleaner.He's been on the road for 2 weeks with no problem.
2002 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR52102
Customer could not leave car any longer will return next month wilth car. Recheck egr tubes all thoy the tubes are new.replumed new vacuum line to map sensor, egr is not on backwards and working properly, try two new delco. will update at later time . Trouble codes: P0401.
2004 Pontiac Grand Prix GTP 3.8L front passanger VIN: 2G2WR544X4
Want to thank everyone who gave me great advise. I ordered the defelctor from GM only $2.46. I replaced the cabin filter and thanks to Steve for giving a suggestion, I pulled the blower out cleaned all the connection and lubricated it well.
2002 Saturn Vue 3.0L Poor Idle Quality, Misfire, MIL Lamp on
Thanks to all who replied. I will be heading North to service this SUV in 2 weeks. The misfire has been reported to be mostly on cylinders 1 & 3. With this newer information, I will be closely looking for intake valve deposits. Perhaps with this high mileage e... Trouble codes: 301 (misfire), 303 (misfire), 305 (misfire).
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