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Prev Professional Automotive Repair Technical Discussions for April 8, 2009
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K4V
thanks in advance techs. we have this buick that the dealership has replaced and warrantied ignition modules 4 times in the last three years. vehicle will stall,sometimes restart and run for a few minutes then no fire. dealer keeps replacing module and lasts 6...
1994 Cadillac DeVille 4.9L Poor Idle Quality, Surge, Stall VIN: 1G6KD52B1R
i would like to start with i hate caddys. this car came in with a no start, surge, and irratic idle, sometimes even high idle. customer changed idle motor with no improvement. when i drove car i found a glitch i the tps so i changed it when adjusting it 16%is ... Trouble codes: E085 (idle thr angle high)
1966 Chevrolet SUBURBAN 350CID starter VIN: C1466S1411
this 66 suburban is restored, powered by a 1970 chevy 350 cid, 350 turbo ss trans. when starting the starter flywheel clash is so severe you think its gona explode. i have replaced the starter & flywheel when i installed a stall convertor. i have shimed the st...
1991 Chevrolet V3500 Silverado 6.2L engine VIN: 1GCHV33N3M
Hey everyone.I need help with a engine condition diagnosis.What should I see on the first stroke of a compression test on this 6.5 diesel?Some are telling me that I should see at least 300 psi then bump up to 400 with the next 5 strokes.What do the diesel pro'...
1992 Chevrolet C2500 Cheyenne 6.5L Engine oil leak VIN: 1GCGC24F1N
Customer has complained of leaking oil. He says one day it leaks and another day it doesn't. It is a work truck that is used to pull heavy loads at times. I do not work on many diesels. cleaned off most of the engine it was very oily, especially on the drivers...
1994 Chevrolet C1500 Suburban 5.7L Excessive Emissions VIN: 1GEKEC16K6
I was wondering if anyone has a good way of unplugging the egr passage on a good old chevy 350 w/tbi. If i have to pull intake I think it will total the truck, Its really not worth the money and not sure if owner wants to. I pullled valve and cleaned it out, b...
1995 Chevrolet Astro 4.3L Forward gears VIN: 1GBDL19W9S
Hi guys, Another tranny amateur mucky-ing up the waters here. I would appreciate any advice. Rebuilt the 4L60E. Customer came in with no movement in any gears (maybe a slight nudge in reverse). Fluid was burnt. Inspected all internal components, replaced all...
1995 Chevrolet C2500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1GCGC24K1S
Hey, This truck runs lean through all throttle applications and stalls at idle. The new fuel pump actually helped quite a bit but still not completely fixed. Here is my question, I suspect intake manifold gaskets leaking on the bottom where I cannot see. No v...
1995 Chevrolet Corvette 5.7L No Start VIN: 1G1YY22P2S
Hey allm I need some opinons on this vet. Came in on a hook,cranks, dosenst run. Nocodes pressent. Has good fuel pressure, and spark. No injector pulse. Injectors have power. ECM is not grounding them. I tested the low and high reference signals at the compute...
1997 Chevrolet Blazer 4.3L Windows/ Blower Motor VIN: 1GNDT13W8V
Hello all. Thanks for help in advance. I have a 1997 Blazer that has been having electrical problems as of late. Started happening about a week ago, where the abs and brake light flash while pushing up or down on the window button or you turn the a/c or heat o...
1999 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC524XX
Ok, I seem to have one that doesnt make sense and Im not sure why. So, my customers complaint is an extended crank after hot soak. While I have verified the complaint, it is very intermittent. The vehicle came in about 2-3 weeks ago with this same complaint. A...
1999 Chevrolet Blazer 4.3L Transfer Case
This question pertains to the 4-button Automatic 4WD system 236. I have repaired a few of these vehicles in the past, ranging from TCCM, to Encoder Motors and electrical connections. I have also run into the unplugged vacuum solenoids and lack of lubrication ...
2001 Chevrolet Prizm 1.8L Cooling Fans VIN: 1Y1SK52801
Howdy folks. I consider myself pretty handy with a wiring diagram, but this one has me beat. This car came in with the complaint that fans run all the time with key on. Sure enough they do. Fans DO NOT run with the key off. Fans run in low-Speed only. Started ...
2005 Chevrolet Colorado Z85 LS 3.5L crankshaft VIN: 1GCDT13615
Ok guys this is my first help request here. I've got a 2005 chevy colorado that came in for a check engine light, after scanning i found codes p0014 exhaust cmp sensor performance and p0017 ckp to exhaust cmp correlation. After some basic checks from the modis...
2001 GMC Jimmy SLE 4.3L No Start VIN: 1GKDT13W71
hello gm techs, i have a bit of a problem here. i have this 01 jimmy- my father in laws (argh) he broke down while driving- i went to scene -- sprayed starting fluid into throttle body-- started- then stalled-- no fuel.. towed to shop-- checked all fuses- ok ...
1989 Oldsmobile 98 Regency 3.8L Hesitation, Stall, MIL Lamp on VIN: 1G3CX54C9K
as per repair history, all components relative to cam sensor signal have been replaced. additional testing (at MY shop) shows the first test, unplug cam sensor, test A-B and B-C for 8-10 volts. A-B has 11.09 volts. B-C has 9.42 volts. all other tests test OK. ... Trouble codes: 41 (cam sensor signal)
2000 Oldsmobile Alero GX 2.4L Poor Idle Quality VIN: 1G3NK52T4Y
need help guys, i have a 2000 old alero that we replaced the water pump timing belt, guides and tensioner. now after the test drive only at idle at a stop there is a rough idel like the car is missfireing, all other speed run great. fault po171 is the only fa... Trouble codes: P0171
1987 Pontiac Bonneville LE 3.8L stuck in 2nd gear VIN: 1G2HZ5130H
no 1st gear, starts in 2nd gear, will not upshift at all no matter what speed or engine rpm. Reverse is good. I rebuilt it 5000 miles ago for worn out 4th gear. When i tore it down everything looked remarkably good. It really is a little 88 year old ladies car...
1999 Pontiac Montana 3.4L Transmission VIN: 1GMDX03E6X
1999 Pontiac Montana vibrates duration shifting. Pulled trouble code P1811. Changed fluid and filter for giggles but same problem. Same vehicle also has airbag light on with code B1040. Any ideas?
2001 Pontiac Grand Am SE 2.4L engine VIN: 1G2NF52T51
swallowing my pride with my first help request... vehicle was towed in as a "no start". scanned for codes, none stored but noticed during cranking my cam signal was coming and going. ( spark and pulse along with it) tried cam sensor. same thing. tried a coil t...
2006 Pontiac G6 3.5L rotors VIN: 1G2ZG55846
vehicle originally came in for brake squeal & pulsation. replaced front brake pads, and front rotors. i always hand torque wheels when i am done. after a trip through the mountains, it came back with a pulsation again. this is a great customer so we replaced r...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Cadillac Escalade 6.0L Charging VIN: 1GYEK63N32
Thanks to all who replied...I got a lot of insight on this vehicle from a lot of helpful people including my local Cadillac dealer! After researching a butt load of wiring, I found that the SEO1 fuse in the under hood fuse box that is 15 amp feeds the On-Star...
1976 Chevrolet Malibu 5.7L electric windows VIN: 1D37V6R415
The fix was tracing the pink control wire that had no power on it when the ignition was turned on. Like I said at the relay I jumped the large orange wire termnal to the large red wires that go to each door. Then both windows would work by the switches. So I k...
1995 Chevrolet C1500 Cheyenne 5.7L Mechanical VIN: 2GCEC19K9S
We went ahead and bit the bullet. We ordered a new set of adapters and so far so good. No more thumping. Don't know if techs were just being lazy with old adapters, or if they were actually bad. We figured a new lathe, go ahead and get new adapters as well...
1998 Chevrolet K1500 Suburban LS 5.7L hard start VIN: 3GNFK16R8W
Hello and thanks to everyone who replied. Well the vehicle didn't start the next morning so we wound up putting the ignition switch in it and going through the re learn procdure. Drove it a few more days and the vhicle has gone back to the customer without a... Trouble codes: P1626 (pass key code).
2002 Chevrolet Cavalier 2.2L Cooling Systems VIN: 1G1JC52462
Hello All, it was the heater core.I'm so glad we have this resource available.Other wise my tunnel vision would be the death of me!! I'm already going bald. Can't afford to loose any more hair. Thank again to all. Alex J.
2000 Pontiac Firebird Formula 5.7L oil; leak at rear VIN: 2G2FV22G7Y
thanx for the replies, the problem was the back seal retainer gasket we replaced the gasket and problem solved ~!~~~!!! thanx againl for the help!!!
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