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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 8, 2006
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal Custom 3.1L MIL Lamp on VIN: 2G4WB52MXS
This car first came in with a code 51. I replaced the prom & it was fine for about 2 weeks. Code came back & the ecm was replaced. The light stayed off for about a week then came back. There is no tests for this. Mitchell basiclly states replace the prom, if i... Trouble codes: 51 (Prom error)
2002 Buick LeSabre Custom 3.8L Noise VIN: 1G4HP54KX2
Have a whine/howl noise at idle heard in the car and around LF door area. Traced to fuel lines vibrating. Disconnect the vacuum line to pressure regulator or remove fuel pump relay (Change fuel pressure) and noise quits Removed clamps holding lines to body and...
2000 Cadillac DeVille DTS 4.6L Compressor Clutch VIN: 1G6KF5792Y
Originally came in with cold air on passenger side and warmer air on driver side. Was low on refrigerant and system cycled like it should. Recovered refrigerant and recharge to spec. All vents blew cold and system worked great until ignition shut off. Now it w...
1990 Chevrolet Corvette 5.7L Hesitation, Cuts out VIN: 1G1YY3388L
This car will bog down in 1st and 2nd gear only. It acts as if something is telling the ecm to kill the power for a split second. I HAVE BEEN TOLD THAT THERE is some connection between the traction control and the ecm that will kill the power if it detects a s...
1994 Chevrolet S10 4.3L speed sensors VIN: 1GCDT14Z7R
Are all the sensores for these S body trucks the same or do they change after 94? Same question for the hubs? I am pretty sure all the differentials are the same with the exception that some have a flange foe the CV axel and some plug in
1996 Chevrolet C1500 4.3L Misfire VIN: 1GBEC14W5T
customer has had this truck for over a year and has had this issue looked at at dealerships and other shops. it misfire on # 3 and 4 cylenders between 1800 to 3100 rpm . cylender #2 is now showing a miss at idle i have replaced wires, plugs, dist cap and rotor... Trouble codes: P0300 (multiple cylinder misfire)
1998 Chevrolet Blazer 4.3L 4x4 VIN: 1GNDT13W7W
Hello IATN. Working on a blazer that is being uncooperative.Customer [...] in with complaint that going uphill after driving a little while and unit is warm he gets a very loud and rough noise and vibration.If he stops and backs up it will go away.Also if h...
1999 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1245X
customer booked car in for intermittant no start, no starter. when she dropped off the vehicle she also added that for the last two years she has always had a hard time starting her vehicle after refueling. i load tested her battery to find ok, but while doing...
2002 Chevrolet Tahoe LS 5.3L front axles VIN: 1GNEK13Z22
We found the front diff full of metal and definately bad. although it doesn't make noise. What we have is a chatter when turning as if the posi were grabbing, but it's not posi. Is there anything else we need to look for before we tear into the front diff?
2002 Chevrolet Silverado 2500 HD 6.6L interior lights(dome) VIN: 1GCHK23182
The customer came in with the dome lights always on, he stated the overhaed light (center ) started flickering on/off for a while then it stayed on solid along with the door panel lights. These symptoms started while towing a trailer. There were not any DTC's ...
2002 Chevrolet Venture LS 3.4L power sliding doors VIN: 1FDNX13E52
i have a venture van here that both sliding doors will not automatically reverse direction when a child blocks the entrance. i have entered diagnostics to find no codes. all three diagnostic modes pass. i have also performed a psd re-initialization. sometimes...
1995 Geo Prizm LSi 1.8L Hesitation, Misfire VIN: 1Y1SK5280S
engine hesitates at mid range rpms in park; and before shifting at high acceleration Trouble codes: 14 (Air Temp)
1996 Oldsmobile Cutlass Ciera 2.2L Extended cranking ti VIN: IG3AJ5548T
Car is hard to start,it turns for along time then starts and runs fine.If you cut off it may start or it may turn along time . When it gets hot it is harder to start. I have a car just like it that starts fine,we changed coumpters,all ignition parts,crank & ca...
1994 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52L1R
Greetings GM Wizards! This Bonneville was towed in as a no-start. There was spark but no fuel pump operation, no check engine light, no injector pulses, no 5 volt reference, no scan tool communication. Checked all the powers and grounds at the computer and fou...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Cadillac DeVille 4.1L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G6CD1189H
sorry for the wait been out of work for awhile but john and pok from virginia were right the heater core was leaking and coolant was all over the ecm and fuse/relay panel thanks for everything Trouble codes: 53 (distributor signal interupted), 52 (ecm long term memory reset).
1990 Chevrolet K1500 Cheyenne 5.7L Valves VIN: 2GCEK19KOL
As I thought 3 psi on the exhaust is to much. I recomended replace the exhaust and replace the lower end of engine for the knock noise it is making.Customer decided it wasnt worth it. Thanks to all for your responses.
1997 Chevrolet K1500 Suburban 5.7L lines VIN: 3GKFK16RXV
well the overall opinion was to bite the bullet and install a new line. customer reluctantly agreed and this is a done deal. thanks to all who replied. never could find a used one or at least all salvage yards said they did not have one.
2002 Chevrolet Cavalier LS Sport 2.2L timing chain VIN: 1G1JH52F92
Thank you for your patience. Spring break and the school email filter not accepting iATN email has caused delays. The 2.2 DOHC started and runs fine. I did NOT prelube or apply oil pressure to the hydraulic tensioner before cranking with the starter. The harde...
2003 Chevrolet Silverado 1500 5.3L MIL Lamp on, won't take fuel
thank-you for everyones help. the fix on this 2003 chev pick-up was as many of you had said, was the vent solinoid valve. valve was stuck closed and would not allow the air to vent to canister while refueling.
2003 Chevrolet Suburban 2500 LS 8.1L engine VIN: 3GNGK2683G
Many thanks to all the techs that responded to this help request .The way we fixed the vehicle was to replace both the crank and cam sensors. The crank sensor broke on removal and we were lucky to remove the bottom half with out taking out the transmission sin...
2003 Chevrolet Monte Carlo SS 3.8L none VIN: 2G1WX12K33
Thanks to you all. most said it was the ign switch, and that was it. With KOER the security light would flash, and i also notices that the cooling fans did not come on, and the A/C system would not switch on,until i started to wiggle with the ign key. ...
1987 GMC R2500 High Sierra 6.2L Coolant VIN: 1GTGR24J3H
Howdy folks, This truck had motor oil in it's coolant. The oil cooler in the radiator was the culprit. Thank you to all who responded with intuitive ideas, including block testing, and checking the ATF. Special thanks to Pete [...], who bot...
1995 Oldsmobile Aurora 4.0L MIL Lamp on VIN: 1G3GR62C8S
After replacing the computer and retrying the idle learn several times it finally took during a smog check. No real fix, it just went out and started working normally. Trouble codes: P0080.
1996 Oldsmobile Aurora 4.0L Mechanical VIN: 1G3GR62C9T
This vehicle is not fixed, but we let the customer take the vehicle and drive it. Our BG salesman said he had one of these and did some carbon cleaning and it fixed the problem, but this seemed like more than that. Will give more info when we get it.
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