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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 18, 2011
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Battery Light On VIN: 3G5DA03E62
Hi All, Thanks In Advance.. Car came in with battery light coming on at times. Usually when warm and under acceleration. When the light is on the vehicle is charging, I duplicated syptoms and had my meter on vehicle, charging 14 volts. Its not a charging issu...
1994 Cadillac Eldorado 4.6L a/c blower motor VIN: 1G6EL12YOR
a/c fan, blower motor, burning up. Took blower assy. apart and found transisters cooked!
2000 Cadillac DeVille 4.6L Starter VIN: 1G6KD54YXY
Hello, We removed the trans to have TC work done, replaced it and now it will not crank over. I have good power feed from key into computer, good ground from Neutral switch, good power on both sides of the relay. if i jump the starter at relay it cranks over, ...
1994 Chevrolet Corvette 5.7L Surge VIN: 1G1YY32P4R
This car came in with this problem when hot and waiting for the light to change the car will serge. I found the intake gasket leaking and replaced them and checked for cracks and straightness before putting back together. I tried to preform a smoke test but my...
1998 Chevrolet P30 7.4L Fuel pump runs 3 sec VIN: 1GBLP37J3W
Coach came in as a crank no start.vehicle started after holding gas pedal down as if it were flooded.checked fuel pressure (52psi), thats when i noticed that when i cycled the key off the pump ran for 3 seconds. Checked pin 85 @ fuel pump relay (which is feed ... Trouble codes: P0463 (Fuel level sensor circuit high voltage)
1999 Chevrolet Silverado 2500 6.0L drive shafts VIN: 1GCGK24U4X
Have a customer that states gets a harsh vibration while driving that is very intermittant. i have only seen vehicle once and checked front end out and everything checks out ok. we obviously have not been able to duplicate problem and have a hard time getting ...
1999 Chevrolet P30 5.7L Hesitation VIN: 1GBHP32R1X
Cust sayed that that the truck has low power on take off and it come and go's fast it will hape like two to three times a day all temps
1999 Chevrolet Tahoe LT 5.7L transfer case VIN: 1GNEK13R1X
Have transfer case disassembled to replace rear case, oil pump wore hole in case. Clutches are not burnt but front drivesahaft could be turned by hand. NP246 aut should have preload on clutches? Has other issues with sometimes being in 4x4 when was last in 2 w...
2002 Chevrolet Avalanche 1500 Z71 5.3L MIL Lamp on VIN: 3GNEK13T42
hello-had this avalanche come in today. p0449, p0452. removed vent valve from truck and bench tested it with 12v and it seemed to function as intended. apply 12v and ground and it seals shut. checked harness and have 12v feed at valve harness connector. re-ins... Trouble codes: P0449 (Evaporative emission vent solenoid control circuit), P0452 (Fuel tank pressure sensor low voltage)
2004 Chevrolet Silverado 2500 HD 8.1L blend door VIN: 1GCHK23G24
Hello GM Techs, I really need your help on this one. We have a 2004 Silverado 8.1L, that will go hot all of a sudden out of the drivers side vents. It has a manual control head with hot and cold adjustments for driver and Passanger.(They slide up and down). Th...
2005 Chevrolet Equinox LS 3.4L compressor VIN: 2CNDL73F55
I cant get output temp down at dash below 70 deg. low pressure of comp at idle is barely 70 psi. Gets better at 3000 rpm;s any help would be appreciated
1989 Oldsmobile Cutlass Ciera 2.8L No Start, Stall VIN: 2G3AM51W5K
hello all and thank you in advance i have a 89 cierra that starts then stalls as soon as you release the key i checked all power and grounds at the ecm and all is good there are no codes in it i cant be for sure but i think it loses spark when it stalls i have...
1994 Pontiac Firebird Formula 5.7L Fuel VIN: 2G2FV22PXR
This is one that is stumping everyone I know. '94 Firebird Formula LT1. The car had been sitting for 5 years or so when I rescued it. Mileage then was 103,000. I replaced the tank, sending unit, fuel filter and fuel pump because the tank was full of rust. The ...
1997 Saturn SW1 1.9L starter VIN: 1G8ZH8283V
This car came in with random no crank problem. All fuses good,main grounds check ok,came in with new starter on it. on initial checks found to have no output on yellow wire at ignition switch when car acts up,switch right,wrong! Replaced the switch and it didn...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rendezvous CX 3.4L Cuts out VIN: 3G5DA03E84
After checking voltage and voltage drops going to the PCM and decided it was the PCM, installed new PCM and programed and it now runs and drives perfect.
1999 Chevrolet C1500 Suburban LS 5.7L Misfire VIN: 3GNFK16TR6
Thanks to everyone that answered back, it was split about 50/50 as to replacing one injector or the whole assembly. We went over the replys with the customer so that he could make a decision. The feed back was a great tool to the eventual solution. It was deci... Trouble codes: P0174 (System too lean bank 2).
2001 Chevrolet Monte Carlo SS 3.8L dead coil 2/5 VIN: 2G1WY15K41
Thanks to everyone that responded...you put me on the right track. Pulled the harmonic balancer and checked the fins-no problem. Put balancer back on and since I don't have a scope I checked the CKP the old fashioned way. Attached a DVOM to yellow and lt.blue/... Trouble codes: P1374 (CKP high to low resolution frequency correlation).
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S84
Thanks for all of the replies. I performed a complete drive cycle with no codes returning. Even after the drive cycle the rear O2 was up at 800Mv. We sent the customer on his way and he was happy with no complaints. Trouble codes: P0128, P0132, P0172, P0455, P0410.
2004 Chevrolet Malibu LT 3.5L turn signals VIN: 1G1ZU54864
we ended up putting in L.E.D. bulbs in this vehicle , was the only fix we could find. honestly, we did not want to do this but we had no choice in the matter. it seems ok at this time. and if it does come back i will let everyone kmow thanks for all the input ...
2005 Chevrolet Malibu LS 3.5L Exhaust Valves VIN: 1G1ZT52875
Good morning Finally had some time to dig into this project once again and removed the timing cover. The key on the crankshaft gear broke allowing the the valve timing to be out of sync, I am just shocked that it ran and did not bend any valves. I am sure w...
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