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Prev Professional Automotive Repair Technical Discussions for October 1, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1997 Cadillac Seville STS 4.6L windows, radio VIN: 1G6KY529XV
Hi, fellow techs. I have a Caddy that the customer put a new battery in and it went dead overnight. When I got in it, I noted that the radio was on with the key out and off. The windows also will operate with the key out even with the door open. Maybe someone ...
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1991 Chevrolet R2500 Suburban Silverado 7.4L Speedo drops out and trans defaults to low VIN: 1GNGR26N4M
Vehicle belongs to the Boss , he has had the speedo head out twice and sent out for inspection and repair . Also replaced both speed sensors and pigtail assemblies . The DRAC module has been replaced , the trans through case connector has been inspected & clea...
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1995 Chevrolet K2500 Cheyenne 5.7L sol b VIN: 1GCGK24K1S
VEHICLE CAME IN FOR INTERMITENT NO SHIFT. iF CUST. WOULD SHUT OFF AND RESTART IT WOULD SHIFT. CHECK TROUBLE CODES, HAD CODE 81 FOR SOL B CIRCIUT. REPLACED BOTH SOLENOIDS AND FILTER. ROAD TEST AND GIVE TO CUSTOMER. NEXT DAY IT WAS AT MY SHOP. SAME CODE SAME PRO...
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1995 Chevrolet Lumina LS 3.4L engine VIN: 2G1WN52X5S
has anyone cheated the system and been able to reseal the oil pump drive on a 3.4 ltr without having to remove the rear head? we removed the crossover pipe for the exhaust and lifted the oil pump drive up and installed another o-ring and added right stuff to t...
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1996 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52MXT
car came in with p1106 code. vacc 19in idle. cked map showed .20 volts all the time, so i tried new map and on test drive would only go to 2 volts on hard accel. normal idle was.7 to .8 volts. so i start alldata tree. koeo unplugged map shows .o2 volts. next c... Trouble codes: P1106 (map intermittent high voltage)
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1996 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R8T
Truck returned after fuel pressure regulator changed with a P0171 code. Found vacumm leaks at MAP seal and brake booster outlet from manifold. Repaired both, cleared codes and reset trim. After 2 drive cycles P0171 reset. Bank 1 LT trim at 14%, ST at 13% and b... Trouble codes: P0171
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2001 Chevrolet C3500 HD 6.5L No Start, Stall VIN: 3GBKC34F21
Hey All , Got this truck that last 2 days has stalled but restarted & runs fine Til It STALLS. Checked Alldata & otc scan tool for tips. But cant find cam orcrank sensor info.What,s the voltage cranking,resistance specs? Happened cool/warm &hot. Thank all, S... Trouble codes: P216
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2003 Chevrolet Trailblazer North Face 4.2L Engine VIN: 1GNDT13S23
Hope some one can help us. Subject is a salvaged Trailblazer that was repaired by our local salvage yard, After getting the vehicle fixed, they drove it about 200 miles and the engine lost compression and died. They replaced the engine with a used engine of un...
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2005 Chevrolet Cobalt 2.2L No Start VIN: 1GIALI5FX6
Hello techs, I have this Cobalt that came in on a hook with a no start, the owner said everything was running fine untill she had a flat tire and ran the battery down with the emergency lights, she replaced the battery and now the car won't start. in the infor...
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2000 GMC Yukon Denali 5.7L radio blows fuse VIN: 1GKEK13R5Y
radio fuse #17 blows intermitantly?
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2003 GMC Sierra 1500 SLE 5.3L MIL Lamp on VIN: 2GTEK19T13
Good day people. I have this GMC Sierra that came in with a code P0220 TP sensor 2 circuit. Last month the vehicle had a code P0120 TP sensor 1 circuit. Did all of the test. Installed new throttle body. Worked good for one month. Used freeze frame data. TP des... Trouble codes: P0220 (Throttle position sensor 2 circuit), P2135 (Throttle position sensor 1-2 correlation)
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2005 Saturn Ion-1 2.2L idle speed fast VIN: 1G8AF52F85
Vehicle came in with low idle speed and almost dying when coming to stop. First suspect is throttle body. Throttle body had some carbon build up. Removed throttle body and reinstalled and now idle speed is to fast 1600 and will not drop. I cannot find any rele...
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Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Skylark Limited 2.4L Hesitation, Surge VIN: 1G4NJ52T6T
sorry for the delay, customer had to take car and has not returned yet.thanks to all who replied, but already tested most suggestions prior to posting.
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1974 Chevrolet Corvette 5.7L Starting
This thing has a solenoid setup that won't start/crank the starter if there is someone sitting in the seat and the seatbelt is NOT connected!! wow, It has a relay assmebly under the center console above the shifter, you can see it, and the purple wire goes fro...
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1994 Chevrolet p30/Winnie 7.4L brake pedal VIN: 1GBLP37NOS
Hi All concensus was that the rear will wear out before the front due to weight distribution I am going with that part I shut off front rotors much beter pedal I shut off rear pads much better .. individualy shut off wheels and aprox 25% better pedal ea...
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1994 Chevrolet K2500 Cheyenne 6.5L Poor Idle Quality, Surge VIN: 1GCGK24F6R
Problem was cured with a reman pump and injectors. Thanks to every one who offered help.
5
2001 Chevrolet Express 3500 6.5L transmission range selection VIN: 1GBJG31F01
This one is fixed,only received 2 responses which were not much help.Traced wiring from pcm to 20 pin connector in transmission. Red wire in 20 pin connector was not making proper contact causing pcm not to receive signal from transmission range sensor that ve...
2
2002 Chevrolet Venture LS 3.4L Warning Light VIN: 1GNDV03E72
Got this one fixed. Both Ray from New York and Jeff from Colorado came up with the correct fix which was replacing the differential clutch check valve in the rear axle. The All Data trouble shooting flow chart kinda led me down the wrong path. It mentioned che...
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2002 GMC Cab & Chassis Sierra 3500 6.6L transmission VIN: 1GDHG31F82
Ok, this one is screwy but figured out. Apparently it came from the auction. Someone put an older disel engine in it and the electronics are totally wrong on the engine. The computer has no rpm signal from the engine therfore it doesn't even try to shift si...
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