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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 22, 2010
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1996 Buick Regal Olympic Gold Edition 3.8L Hesitation, Stall VIN: 2G4WB52K3T
vehicle was brought into the shop for lack of power and somtimes would not start. ran basic checks and found had low fuel pressure and when volume was checked, engine died. had to cycle the key about 6 times to get pressure to build up. removed fuel tank and r...
2002 Buick Park Avenue Ultra 3.8L proportioning valve VIN: 1G4CU541X2
has anyone come across unwanted drp activation at 50-60 mph under light braking. checked for abs codes (none) checked speed sensors and etc see no problem. there is a tsb #4001 but cannot find any info on it anywhere thank you for any help
1990 Cadillac Eldorado Biarritz 4.5L Excessive Emissions, MIL Lamp on VIN: 1G6EL1335L
I am getting a code E046 fuel imbalance. Replaced both front O2 sensors, fuel injection cleaning. Right side is now reading around .9v rich condition. The owner does not want me to put anymore time into this one and the customer would like there car back. I do... Trouble codes: E046
1997 Chevrolet Tahoe 5.7L starts off in 3rd VIN: 1GNEK13R5V
In deep on this one ,maybe over my head.In the beginning we had P0420 , P0740, P0753 , P0758 , P0785, P01860 .Confirmed it needed a set of cats and replaced them.Everything I could read , and the fix archives indicated an electrical problem , usually associate...
2001 Chevrolet Silverado 3500 6.6L No Start VIN: 1GBJK39111
Having hard time with this Duramax. Truck came in for hard start and now is a no start. After doing the following tests checking fuel return flow truck will start during the process. After a test drive it will go back to a crank/no start. I have followed allda... Trouble codes: P0094 (Small fuel leak)
2003 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: 1GCEK19T03
Hello, We have been fighting this one. When code first set we could not get the vent solenoid to vent so we did the TSB, it lasted for about 2 weeks then 446 again. The second time my tech found the fuel tank pressure sensor indicated 10 inches of vacuum,I thi... Trouble codes: P0446 (evap vent circ. malfunction)
2003 Chevrolet Monte Carlo LS 3.4L No Start VIN: 2G1WW12E03
Came in running bad it had overheated because of a bad water pump,found low compression so after replacing the heads we esded up with a no start condition hook up the vearus there is no codes all the engine parameters seem Ok exept the cam sensor(cam sensor si...
2001 GMC Sierra 3500 SLE 6.6L Battery Draw VIN: 1GTJK391X1
Hello all I have this Gmc in here with a battery draw. I tracked down 3 draws. had a 30 ma draw on a kc lamp relay added by cust. then found 80 ma draw from the radio and I have a 60ma draw from fuse #43 it is a 15 amp fuse to "SEO 1" I cant find anything in m...
2003 GMC Yukon SLT 5.3L transfercase actuator motor VIN: 1GKEK13T93
I am replacing the transfer case actuator motor. I have the harness unplugged from the vehicle and all three bolts removed that attached the actuator to the transfer case. It is now loose but won't drop down and away from the case. What else do I need to do to...
2004 GMC Yukon Denali 6.0L engine VIN: 1GKEK63U04
I have an 04 Denali with a 6.0 here that runs horribly. Found out that the valves are not sealing up , but it seems that the lifters are holding them open. Can loosen the rockers a bit and the engine smooths out. I was wondering if anyone had run into this on ...
2005 GMC Canyon Z71 SLE 3.5L abs VIN: 1GTDT13675
Truck came in for noise in front end. Replaced left front wheel bearing. Abs light came on after repair. Sence then replace wheel speed sensor for lf wheel code. Tryed nother sensor same result. Compaired readings on modis rf is smooth. Lf is all over the plac...
2001 Oldsmobile Alero GL 2.4L windows, a/c control panei VIN: 1G3N152T61
got this alero that's driving me nuts. no power windows or a/c control panel inop - no blower motor operation. when i supply power to the master switch - brown wire - everything works. am wodering the best way to fix the power supply to the switch through the ...
2005 Pontiac Montana 3.4L left power door VIN: 324GSD6485
this van came to me with left power sliding door not working it works with the switch on doorpiller and with the switch in center roof panel but not with iner and outer door handles is ther a switch for the handles i have looked it ther do not see one

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Riviera 3.8L speedometer VIN: 1G4G567143
Replaced the speed sensor, VSS sensor vehicle did not come back inspect the harness and found no issues.
1991 Cadillac Seville 4.9L Parking Brake VIN: 1G6KS53B6M
Sorry about the delay guys and gals. The customer finally returned with the vehicle and I verified it to be the neutral safety switch at the base of the steering column, like many of you suggested.
1998 Chevrolet K1500 Silverado 5.0L Misfire VIN: 1GCEK14M7W
Sorry Guys took I forgot to close this until I logged in today. The Problem was the distributor. Put a new one that we had in it and misfire ceased. What a nightmare. Thanks for the help guys Trouble codes: P0300.
1998 Chevrolet Tahoe 5.7L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1GNEK13R4W
well this one is fixed after a couple of days of looking for the problem i have learned a valuable lesson with this truck when many other people have done work in a vehicle it can become a nightmare but i finally found the problem as i stated before when i dis... Trouble codes: P0300.
2000 Chevrolet Blazer LS 4.3L oil cooler VIN: 1GNDT13W12
Well,as many of you wrote, getting the plastic rings are hit and miss.New lines came with one and not the other.Part reordered and came the same way. I checked with customer and she said radiator was replaced a month ago.I installed new GM fittings and then us...
2004 Chevrolet Blazer LS 4.3L low beam headlights VIN: 1GNDT13X04
problem was underhood fuse box.found a connector that had melted
2004 Chevrolet Silverado 1500 4.8L 1-2 Shift VIN: 1GCEC19V14
Come to find out this truck had a salvage yard transmission installed a year ago. Our transmission rebuilder found that the transmission was actually a 06' 4L60E, not a 04' 4L60E. He sourced out a new case and rebuilt it. Thanks for all the info and help guy...
2000 GMC K2500 Sierra SL 6.5L Cuts out, Stall VIN: 1GTGK29F3Y
2003 GMC Sierra 2500 HD 6.6L MIL Lamp on VIN: 1GCHK23123
Thanks to those who responded but we are honestly no further in solving this one. Had another identical truck come in with same symptoms and if we get that one figured out we will post a fix. The problem is so intermittent that it is almost impossible to locat... Trouble codes: P0500, P0700, U1152, P0721, P0746.
2001 Oldsmobile Bravada 4.3L Starting VIN: 1GHDT13W21
Well fellow techs...this one has me stumped. I figured I would close the request per iATN rules, but sadly I have not grasped the problem with this vehicle. I did receive some very valuable information along the process, and I thank you all very much for r...
2002 Oldsmobile Bravada 4.2L No Start, Hesitation, MIL Lamp on VIN: 1GHDT13S52
thanks for all the replies. the fix was a loose ground wire in the back of the truck. also there was alot of water in the fuse box under the hood. dried out the wires under the fuse box and replaced the ground wire and it has not actted up again so we are c... Trouble codes: U1000, P1683, P0116.
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