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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 7, 2005
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Open Help Requests for GM
Help Request Answers
1992 Buick Roadmaster 5.7L No ignition fire VIN: 1G4BN5370N
This is a high mileage car that is clean and good shape, problem seems so simple but is working on us and the tech lines that we tried. When the car warms up it will spin good but no start. Has injector pulse but the ignition will not fire but about 2 to 3 tim...
1992 Cadillac Eldorado 4.9L No Start
just hoping someone can stear me in the right direction,I have a no start.. this was a repo from used car lot and has been tore up.in the trunk there are several boxes and looks like the top right on is missing , clock spring is hanging, wires cut,,the securit...
1995 Cadillac Seville SLS 4.6L Excessive Emissions VIN: 1G6KS52Y0S
Thanks in advance.This car failed nox on the california dyno load emission test. The readings i listed are after replacing the cat. converter . The cruise (25 mph load test) was at 510 and is now at 27 and the 15 mph load test (that is what i entered in the id...
1997 Cadillac DeVille 4.6L oil leak VIN: VU25122334
guys i need help, this caddy came for an oil leak, clean engine and added oil dye, ran engine and found oil leaking from rear main seal area, drop transmission and replaced rear main oil seal with new type of seal, found no one in this area had a seal installe...
1994 Chevrolet K3500 7.4L Poor Idle Quality, Surge VIN: 1BHK34N4RE
This vehicle has an idle surge problem. It seems to exibit no other driveability symptoms. Idle hunts excessively after warm up and short drives.
1995 Chevrolet Astro CL 4.3L Brakes VIN: 1GNEL19W3S
After previously mentioned repairs, and no help showing in AllData, or from the techline, the vehicle still pulls right on moderate to hard stops. Placing van on rack shows the left side engaging late, and releasing late, indicating what I thought was basic hy...
1995 Chevrolet Lumina APV 3.8L Hesitation, Cuts out VIN: 1GNDU06L5S
I HATE CARS! Vehicle presented with a violent shaking 25 to 50 mph. Our test drive showed the front end shaking from side to side intermittently. It felt just like a Caravan with a seized inner cv joint. Replaced both front axles and the shaking was reduced. ...
1995 Chevrolet C1500 Cheyenne 6.5L No Start VIN: 1GCEC14SXS
Hello felow techs, Im in over my head with this one. 95 chevy c1500 diesel pickup was towed into my shop about 2 months ago, with a no start situation. we pushed it into the shop and put the batteries on charger for several hours. we then tried to start it, an...
1999 Chevrolet Blazer 4.3L Hesitation, very sluggish VIN: 1GNDT13W1X
The truck is very sluggish when taking off from a stop and through out acceleration. Its worse when first starting. Checked for codes- none. Distributor was off so adjusted to 0 cam. Checked fuel pressure and filter ok. Cleaned injectors with motor vac. Has no...
1999 Chevrolet K1500 Suburban 5.7L ignition VIN: 3GNFK16R3X
i don't have any spark on cylinders 4,6, & 8. the rest of the cylinders are firing correctly with ample voltage. the vehicle does have headers on and had a worse misfire before plugs, wires, etc. were installed. old plugs were almost completely burned out and ...
1999 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03ESX
I need help figuring this one out, vehicle has a dtc for p0171 fuel system lean. Freeze frame showed that code occurred at 37 mph 1732 rpm. basic diagnostics I performed found pcv elbow broken I replaced that cleared the code and reset fuel trim values took fo... Trouble codes: P0171
2001 Chevrolet Suburban 1500 LT 5.3L Drivetrain VIN: 1GNFK16T11
Hello Fellow Techs, This Subruban exibits a solid type of vibration that starts around 50 mph and gets worse as speed increases. Removed front prop and vibration is gone. Front prop u-joints feel ok. Slight noise in front diff when spinning left front wheel b...
2002 Chevrolet Trailblazer LS 4.2L transfer case VIN: 1GNDT13S82
Greetings, all; The customer is in for routine service, but asked us to take a look at his 4WD operation while it is here. The concern is occasionally (3 times in the last month)while he is driving for an extended period of time at highway speed, one or more...
2002 Chevrolet Avalanche 1500 5.3L Engine VIN: 3GNEC13T13
Guys, This vehicle just shut down. The oil change light came on and the engine shut down. I am not getting any spark at the plug wires, the light that circles what gear is engaged does not come on. The engine turns over as normal. Is there anywhere I can exce...
2003 Chevrolet Avalanche 1500 5.3L radio volume,warningbuzzer VIN: 1GCEK14T4T
customer said three mouths ago went to start it no crank no radio volume,no warning buzzers,all dash lights worked ,jump it.it started. never a problem till now. then gm said they put there scanneron it said nothings wrong typical. any help would be appeciated...
1991 GMC Syclone 4.3L detination VIN: 1GDCT14Z7M
does anyone know the specs for a volume test on the fuel pump? I'm testing it at the soft line (return) right before the fuel tank.
1992 GMC Motor home 454CID No Start, Stall VIN: 70N6322373
Hi again, thanks in advance for ay help. I'm posting about this motorhome again...it is a thorn in my side that never goes away!!! In related repair history, there is the origanal post for a problem that was fixed with a new computer, now it will stall and no...
1993 GMC Safari SLE 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy VIN: 1GKEL19W3P
Hello Techs. Thank you in advance for any help. This van is blowing black smoke out the pipe and you would die in less than 2 min with a closed door. The o2 sensor is pegged in full rich. The fuel press. is perfect at 55 at idle and when you shut it off it goe...
1979 Oldsmobile Delta 88 6.6L radiator VIN: 3L37Y9X197
i have a problem with this car. it has a 1970 455 olds engine with a lot of high performance parts just put in. last year had a 455 also with no problems, but no real modifications to motor. once engine gets hot idling everything is ok and or working properly....
1995 Pontiac Grand Prix GTP 3.4L radio VIN: 1G2WJ12XOS
Hey guys, I have this Grand Prix that we bought off a customer that needed timing belt replacement. And of course the battery was disconnected and now the stereo is locked. I can not get ahold of the customer for the code, and I want to sell this vehicle with ...
1999 Pontiac Grand Prix SE 3.1L head lamps, ac blower, cooling fan VIN: 162WJ52M2X
I need some help from you electrical wizards out there. The customer brought her car in because it overheated on her way to work. Her fans were not coming on. The ac blower only worked in high speed. When checking the blower circuit our technician noticed the ...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Electra Park Avenue 3.8L No Start VIN: 1G4CW5136H
well thanks to everyone that replied. I was looking at 2 problems first the timing chain/gear set was the cause of the no start (must have been magnatized had not jumped) and the new maf sensor and the used one he had were both no good put a new one in and it ...
2001 Buick Park Avenue Ultra 3.8L stability system VIN: 1G4CU54131
well guys, this was a case of not seeing the forest through the trees i assumed that the level ride was the stability system. it was not the vehicle has as system that measures steering wheel speed and compares it with the abs system. after pulling the cod...
1992 Cadillac DeVille 4.9L No Start VIN: 1G6CD53B2N
Well... I put a second set of spark plugs in it and it started right up... I guess you can never trust brand new parts 100%...
2001 Cadillac DeVille DTS 4.6L lights and power acc's, no crank VIN: 1G6KF57941
tks for replies. car has be on road for two weeks now and no problem. scott from illinois was on the money. we removed the bolt that connects the gnd cable to the alternator and cleaned threads. the engine cradle had to be lowered to access alternator. we also...
1992 Chevrolet Lumina 3.1L Mechanical VIN: 2G1WL54T1N
Hi guys! Well first I'd like to thank each and every one of the many who replied. As some of you suggested, I tried the trick of rocking the crankshaft back and forth but didn't feel anything. Mr. Martin [...] suggested the easiest way by removing the oil ...
1997 Chevrolet K2500 5.7L Cuts out VIN: 1GCGK24ROV
Quite a varity of responses returned, After extensive test drives I feel the problem is in the trans. I sent him down the road to a trans shop.
1998 Chevrolet Malibu LS 3.1L right axle? VIN: 1G1NE52M9W
Although i'm still not sure which part was the problem i replaced the new axle with another because the outter joint seemed to bind and i put in a new hub assembly as well. This seems to have cured the problem,the noise did go away. I did find out that this tr...
2000 Chevrolet Blazer LS 4.3L temperature VIN: 1GNDT13W4Y
Thankyou to all that answered and helped. The problem did indeed lie in the blend door. The shaft had severed inside the casing where it was not visible. This is the first time I've seen this problem, usually it's trans fluid in the servo's. Will have to add t...
2001 Chevrolet Blazer LS 4.3L Will not come out of 4WD VIN: 1GNDT13W31
Hello Techs, After checking everything on this blazer twice I went for changing out the TCCM, upon finding out none were available for this blazer used in my area and a new one was $ 375.00 cost I decided to run pin out wire checks from each wire on the TCCM t...
1996 GMC C2500 Suburban 6.5L Misfire VIN: 1GKGKZ6F4T
hi guys, thanks for your help on this one. i have decided to close this help request but i have not fixed it yet. although we had the fuel filters changed and some clean fuel run through it for several tanks now and the fault has never reoccured. we have poor ...
1996 Oldsmobile Cutlass Supreme SL 3.4L oil consumption VIN: 1G3WH12X6T
Well after all the replies indicated that this 3.4 DOHC does not/will not contribute to the condition that we have with excessive oil consumption on this one, we started to look at the combustion chamber. Visual inspection of the front three plugs showed oil c...
1997 Saturn SL1 1.9L Misfire VIN: 1G8ZH528XV
Thanks for all the replies on this one. Ended up checking for sticky valves by running vehicle at 3500 rpm for 30 seconds, and letting it return to idle. Sure enough it would missfire, changed oil and filter and added 1 quart of Marvel Mystery Oil to crankcase... Trouble codes: P0302.
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