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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 11, 2007
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1989 Buick Riviera Luxury 3.8L touch screen dash control VIN: 1G4EZ11C6K
sound system,climate control,tacometer ,temp etc are all controled on this touch screen .it randomly goes out leaving you unable to change any settings.hitting bumps sometimes turns it on & off but not always. inputs seem o k wiggle test on harness has no chan...
1993 Buick LeSabre Custom 3.8L abs light VIN: 1GHP53L8PH
I can not get the codes to clear on this buick we have tried everything. customer complaint was abs light and brake squeal. we replaced the bad brakes in the front including the calipers and hoses. ABS system has code 37 for left rear wheel speed sensor, 45 ma...
1995 Buick LeSabre Custom 3.8L rear springs VIN: 1G4HP52L5S
This is the 3rd time this buick has come in with the small adjuster return springs broken and the self adjusters backed off on the rear drum brakes. I know what you are going to say " the adjusters are on the wrong side" they dont seem to be installed incorrec...
1991 Cadillac Seville 4.9L Cuts out, Stall VIN: 1G6KS53B8M
i have a wonderfull cadi. here that i can't help wanting to set fire. there are several thing that are occuring i hope that some are related. first thing car stalls cuts out after you have been sitting in a drive through. temp starts at about 210 climbs to 230...
1994 Cadillac DeVille Concours 4.6L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G6KF52YXR
Fello techs, you guys have always come through for me in the past and I'm sure you will again, we have a 1997 Cadillac De Ville Concours, 4.6. Originally came in for a rough running miss, scanned computer and had a PO32=Map sensor circuit, PO95=Engine stall de... Trouble codes: P0032, P0095, P0071
1995 Cadillac DeVille 4.9L Misfire VIN: IG6KD52B25
Ok, Car runs fine at idle, when you accelerate to 1000 in drive ok, go to 2000 or more #1,3,5,7, inj cut out. Good power to the hot side, but refrence signal goes out, on the other side of inj connecter! New pcm, same problem, no codes. Whats my next step? Tha...
2003 Cadillac Escalade 6.0L Traction control VIN: 1GYEK63N23
Customer complaint is "traction active" warning comes on instrument panel and engine looses power while warning is on.This happens intermittently on initial acceleration before 1st to 2nd shift, lasts about 3-4 seconds, then rarely if ever does it again until ...
2003 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KY54913
Computer Scan, Miss #5 cyl., compression test was good. Fuel pressure was good. Swapped spark plugs to other cylinders, swapped spark plug boots to other cylinders. Tested & lab scoped fuel injectors, swapped fuel injectors to other cylinders, checked with noi... Trouble codes: P0300 (Random Miss), P0305
1998 Chevrolet K2500 Cheyenne 5.7L Hesitation, Cuts out VIN: 1GCGK24R5W
no codes all pids look fine all fuel trim fine. fuel pressure to specs and incresses with throtle.have tryed know good maf, ing module. coil. will hesitate and bake fire thur intake when steping hard on gas. happens at idle or on the road. never stalled but ha...
2002 Chevrolet Monte Carlo LS 3.4L Hesitation, Misfire VIN: 2G1WW15E02
car runs and starts fine when i give wot it sounds like it's choking and no power fuel pressur is 58 psi when brake tourqing and has no power. thanks in advance steve
1999 GMC Safari SL 4.3L Mechanical VIN: 1GKEL19WXX
Just wondering where the a/c drain is on this van, the right side front floor is getting wet and cant find the drain. I'm on holidays so dont have access to shop or hoist. this is in-laws van. Also, when turning corners, anywhere, the van is binding, shudderin...
1966 Oldsmobile TORONADO 5.0L radio VIN: 6639687435
need some help guys i have a 1966 olds toronado that we have just restored for a customer but i need a wiring diagram for the radio. i know its not a complicated system but i think i'm missing something so that i can get the radio working. i need to know how t...
2000 Pontiac Bonneville SLE 3.8L ride control VIN: 1G2HY54K4Y
Car originally came in with ride compressor that wouldn't shut off, found level sensor rusted and stuck and high resistance in the middle. now car is back with same condition. no codes, can actuate exh and compressor with tech 2, but car will stay up all the w...
2001 Pontiac Grand Prix SE 3.1L a/c system VIN: 1G2FC9345H
Hello fellow A/C techs I have this PG here that won't pull the low side down and won't push the high side up on the gauges. Looked like bad compressor so got used one changed it out, vacumed it down and holds good. Upon recharge the low side goes up but high s...
2002 Pontiac Grand Am GT 3.4L ecm VIN: 1G2NW12E92
Vechicle came to shop for state inspection and oil change , after service performed no start condition occured. checked for codes and got 2 undocumented ones B2965 and B1374 with additional code U1128 loss of IRC Communications I'm having trouble finding info ...
2006 Pontiac G6 3.5L steering rack VIN: 1G2ZG55806
Has easy turning to left hard turning to right.Happen after front in collsion. Has elect steering.

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick LeSabre Custom 3.8L engine noise VIN: 1G4HP52K53
Yes it was the pcv valve o ring missing. The customer failed to tell me that he had just replaced the valve his self to save some money, now it only cost him 2hrs of diag time and a aggravation fee. Thank you all again for your time and information as I knew s...
2004 Buick LeSabre Limited 3.8L No Start, Cuts out VIN: 1G4HR54K44
Thanks to everyone for your help, even though we never got bad test results on the MAF We replaced it With A New AC Delco,and performed a Few sugestions by fellow IATN members, we've driven the car every day for a week everything looks good so far,Thanks again...
2003 Cadillac DeVille 4.6L pressure sensor VIN: 1G6KD54Y23
thanks to all the responses. my customer has not come back for the reprograming. The procedures and ideas are great.
1988 Chevrolet Corvette 35th Anniversary Edition 5.7L Hard start VIN: 1G1YY2183J
Thanks for all of the replies,I ended up cleaning the fuel Injectors,found out that the car has been siting along time.Plus with only 16000 miles on it was a dead give away.Car starts great now.
1989 Chevrolet Corvette 5.7L No Start VIN: 1G1YY3186K
Thanks for all your responses and sorry about being a little late. Luckily customer did not need the vehicle and is very patience. Chris [...],Russ and seveal were correct about the shorted injector. It turned out #3 was the problem. Would of saved me a lot ...
1994 Chevrolet Beretta Z26 3.1L Cooling fan, Windshield Wipers, Radio. VIN: 1G1LW15M1R
When I went to the parts store and asked for the ignition switch, they only gave me the lock cylinder as a lot of you all mentioned. The electric part of the switch is what is bad, so I believe that is the solution. Autozone.com has a repair guide so it was ve...
1998 Chevrolet Blazer 4.3L 3-2 sol .valve ? VIN: 1GNDT13W5W
Ok members of the jury heres what we've done the car is fixed.The wiring was checked for the bizillionth time then it occured to us that since the code was setting regularly one day we could simply find a solonoid with similar resistance cut the wire to it at ...
2001 Chevrolet Express 3500 5.7L Starting VIN: 1GCHG39R51
Thanks to everyone. You were right on. The pump had 45-50 psi at different times. Changed pump and filter. Everything is perfect now. Should have checked on exact fuel pressure specs before I wrote this but the touchy ignition switch seemed to make my mind foc...
2002 Chevrolet Suburban 1500 LS 5.3L cooling system VIN: 1GNFK16TX2
O.K. so we pulled the radiator and had the tanks removed and they found the radiator was 60% plugged and impacted. We replaced it and all is good. I'm not sure why my infra red temp gun didn't pick up any cold spots, but it was very hard to get to the radiator...
2003 Chevrolet Trailblazer North Face 4.2L No Start VIN: 1GNDT13S33
Hello fellow techs. This unit is fixed. The first clue was the preexisting code for loss of communication with the bcm. The second was the fact that the instrument cluster was not reading voltage and the odometer was not on when the key was in the on position.... Trouble codes: P1630.
1998 GMC Savana 1500 5.0L inop or hard shiftin VIN: 1GTEG15M9W
we again replaced the pcm with another new one , reprogramed it & the vehicle is good to go . thanks
2001 GMC Yukon XL 1500 SLE 5.3L Dome Lamps VIN: 3GKEC16Z52
Thanks to everybody who helped with this. Dennis [...] at Coles Garage recommended removing the courtesy lamp relay and if the lights stay on, it had to be a wiring problem between the relay and dome lights. Turns out, there was a wire grounded from an aftermar...
2003 GMC Sierra 2500 HD 6.0L starter VIN: 1GTHK29U33
After replaceing the nuetral safety switch, we had to clear the engine trouble code before the truck would start. Also GM recommeneds to update the programming on the pcm for these vehicles with this problem.
1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T9T
Hello everyone. Several of your replies talked about rechecking cam and crank sensor signals and their output strength. Some asked about the brand of PCM I was using -AC Delco. Others talked of burned fuses or links. Then the correct answer - I had replaced th...
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