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Prev Professional Automotive Repair Technical Discussions for September 12, 2006
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue Ultra 3.8L lower intake gasket VIN: 1G4CU5216S
Hello all I have trouble w/the lower intake gasket ends seals on this 3.8 s.c.engine failing.what has happened is the end seals split in two and start leaking oil after about 6 months time.the past gaskets were replaced in april 06 now its back again with the ...
1992 Chevrolet Beretta 2.2L No Start VIN: 1G1LV134ON
Just Shut Off one day driving down the road,need help ,No crank signal on hand held Matco scanner, no codes found, thought at first it was a fuel pump , because it just died and then restarted up but ran only for a few seconds and died again and has started up...
1993 Chevrolet Lumina 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G1WL54T3P
Car arrived with customer complaint of poor driveability and MIL. We confirmed poor idle, poor acceleration, and rich exhaust. Car will start immediately. We scanned the ECM and found all the below codes which when erased return immediately with the KOEO. We a... Trouble codes: 35 (iac), 43 (ESC Module), 53, 16 (System Voltage too low. System voltage too high), 23 (IAT high), 21, 22 (TPS high. TPS low), 81 (Internal ECM problem)
1996 Chevrolet Impala SS 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy VIN: 1G1BL52P0T
This is my boss's car. When the car is cold the engine runs fine. Once it goes into closed loop #4 cylinder starts to miss driving bank 2 to correct rich due to the excessive o2 in the exhaust.Some of the the other cylinders start to miss on this bank after a ...
1997 Chevrolet K1500 Cheyenne 5.7L Misfire, MIL Lamp on VIN: 2GCEK19R7V
This truck has a misfire under light load, usually when going up a slight grade, when rpm is between 1500 and 2000. According to my Snap-On Solus, cylinder #5 is misfiring. Although they have been replaced I tried swapping the spark plug and wire, no change. F... Trouble codes: P0300 (Random Misfire), P0305 (Misfire Cylinder 5)
1997 Chevrolet K1500 5.7L Cuts out, Misfire, MIL Lamp on
vehidle came in for fuel pump did that it runs fine untill it is put under a load like climbing a hill on the interstate. Then it starts misfireing on all cylinders number 4 and 8 mis most. cap rotor plugs wires all new coil checks out ok runs fine on flat gro... Trouble codes: P0300
1999 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEK14T7X
When we still had the same readings of low voltage at the rear O2s I unplugged the conector at the O2 and checked pins. The sensor wire (purple) and the tan wire which is grounded in the sensor both have 5 volt on them. We replaced the computer with a new one ... Trouble codes: P0157
2000 Chevrolet Blazer LS 4.3L transmission VIN: 1GNDT13W5Y
Hello, This blazer came in last month with a bad transmission. No forward or reverse. Fluid was very burnt and lots of metal particles in trans pan. Rebuilt tans installed, coolerlines flushed. The vehicle came back 3 weeks later with a complaint of a shake a...
2001 Chevrolet Tahoe 5.3L compressor VIN: 1GNEC13T91
well I had this one posted before and had some responses on bad compressor, redesigned suction hose... after replacing both again vehicle left with no problems... less than a week it's back with the same vibration/ flopping tensioner (yes new belt and tensione...
2001 Chevrolet Astro LS 4.3L Mechanical VIN: 1GNDM19W71
Van makes a "creaking" noise just as coming to a complete stop. Not the abs noise caused by rusted sensor. Noise comes and goes, is not at every stop. Has new rotors and new ceramic brake pads. Thank you for any help sent.
2001 Chevrolet Impala 3.8L Cranking Circuit VIN: 2GIWH55K61
To All, This is my wife's car.Car had a no crank situation this AM. Started to check it out and of course when I checked for power on the "s" wire it started. I must have tried it 100 times since then and it cranks every time.. Went over all connections at cra...
2002 Chevrolet Camaro Z28 SS 5.7L spark knock/ping VIN: 2G1FP22G42
Normal driving conditions on accell it will spark knock (and yes it is spark knock) and under hard accell it is very loud. Did engine decarb (X66P) with engine warm, then drove it with no change. Then soaked overnight and still same noise. Looked at Modis and ...
1993 Pontiac Grand Am SE 3.3L No Start VIN: 1G2NE14NXP
We have a problem the car came in with no start found no spark or injector pulse ck crank sensor and module found ok checked wiring to crank sensor found no resistance. We have checked every thing i can think of. We have even changed module and crank sensor. ...
2002 Pontiac Grand Prix SE 3.8L Hesitation, spark knock VIN: IG2WP52K42
vehical came to me will poor accelation and spark knock no codes found in computer, good fuel pressure and flow when in bay if rev engine will hesitate and starts to random misfire engine seems to be running lean but unplugger maf did not make change replace w...
1997 Saturn SL2 1.9L Surge VIN: 1G8ZJ5272V
Found POS battery cable loose, causing a no crank/no start. Cleared codes and drove for 15 mi no codes came back. Car has flat spot/ EGR surge when EGR is opening about 1/4 to 3/4 throttle, EGR voltage and % match on scanner.When I unplug EGR car runs good. Ha... Trouble codes: P0141, P0300, P0326, P1555

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Seville SLS 4.6L Poor Idle Quality, Surge VIN: 1G6KS52YXR
Many of you that replyed were on the same page as me. fix the basics first, then address the idle issue. this car just had too many issues, and I am hoping the car stays away! he never came back... Trouble codes: P0035, P0025, P0080 (ac delco replacement).
1994 Chevrolet K1500 Suburban 5.7L abs module VIN: 1GKFK16K2R
Thanks to all who responded. As most of you guessed, there was a defenite problem with the remanufactured units. A used unit from an identical one from a boneyard solved the problem. I did learn a thing or two about this 4wal system, you must use the right yea...
1997 Chevrolet K1500 Suburban LS 5.7L No Start VIN: 1GNFK16R4V
Thanks for all the sugestions on fixing this problem,we replaced the cap and rotor with a better quality one and seemed to fix the problem. Thanks Again
1999 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R7X
At this point in time, we are calling our problem fixed. Customer has driven quite a bit with no more complaints with check engine light or driveabilty issues as of today 9/12/06. We replaced the sub-harness from the O2's to the back of the engine. The harness... Trouble codes: P0137 (bank 1 sensor 2 low signal).
1997 GMC K2500 Sierra SL 6.5L No Start VIN: 1GTGK29F9V
it's been a week and follow up with our client shows our repair was sucessfull. we replaced the sending unit in the tank. the suction line had a tiny pin hole caused by rust which allowed air into the fuel system and fuel back into the tank. the air in the lin...
1997 GMC K1500 Sierra SL 5.7L brake pedal VIN: 1GTEK19M7V
First I would like to thank all the people who replied, I recieved many good tips. Most pointed to either bad/loose wheel bearings, rust or dirt under the sensor mounting pad, or bad connectors to sensor. I cleaned the sensor connectors, and their mounting pad...
1998 GMC c6500 .0L hyd\elect pk brake VIN: 1GDTJ6H1J9
found book with simuarl system read theroy of system found out that system uses [...] ATF.not brake fuild even tho it is a brake system called GM.and they said the ATF was correct fuild so fulshed system completly replaced with ATF as of 5pm today system wa...
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