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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 13, 2009
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Open Help Requests for GM
Help Request Answers
1991 Cadillac DeVille 4.9L No Start VIN: 1G6CD53B3M
this is basically a reply to all the techs that participated in this fix venture thanx for all the imput it did the trick there were five bad injectors and the customer wasn`t too happy to find this out but the diagnosis was right on
1996 Cadillac DeVille 4.6L front struts VIN: 1G6KD52Y8T
My question is,is there a replacement strut avialable to get rid of the electronic struts on the front end as they are 960.00 for the left and 1350.00 for the right side,which exceeds the value of the vehicle.My sources said the replacements are up to 1995.199...
1987 Chevrolet R30 Scottsdale 7.4L low pedal VIN: 1GBHR34N6H
good day what we have here is a low brake padal,pinch off flex hoses good pedal.this used to be hydraboost but has been converted to vacuum boost.this truck has sometimes an awsome brake just wave your foot over the pedal and it will puit this thruogh the wind...
1997 Chevrolet Express 2500 5.0L No Start VIN: 8976YUHJ89
truck towed in no start i removed an existing partially melted 30amp fuse from 20amp ecm-b receptical 20amp ecm-b fuse receptical in the fuse panel is alittle melted i replaced it with a proper 20amp fuse and the truck started right up running good fuse p...
1997 Chevrolet S10 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS1449V
this truck came in from another shop. ses light on p0300 stored misfires on cyl 3 sometimes on cyl 4 sometimes and also on 1&2 mostly on 3&4. but not consistant. have replaced no.3 spark plug and pcv valve (wrong one)have checked firing order (ok) coil res.(6k... Trouble codes: P0300 (ramdom misfire)
1999 Chevrolet K2500 Suburban 7.4L Poor Idle Quality, high idle VIN: 3GNGK26J5X
truck came in with intermittent high idle. we replaced iac motor and it idled perfect. customer left for 2 days and came back with same problem. no codes still. you can plug the iac hole, start it and feel the iac clicking like its trying to work but the pintl...
1999 Chevrolet K1500 LS 5.7L lock-up convertor VIN: 1GCEK19R9X
just repaired radiator and test drove to find that the truck now has a tcc shudder. the customer never stated taht this problem was there before. i do belive him, he is a very good customer. the tcc will engage then will start to slip around 100 rpms then feel...
1999 Chevrolet Monte Carlo LS 3.1L security light VIN: 2G1WW12M4X
I can't find any info on my situation in any archives. This vehicle came in as a no start/no crank. There is full battery voltage (12.6v) everywhere it needs to be (pos cable, ignition switch etc...). When you go to the start position on the ignition, there is...
2000 Chevrolet Corvette 5.7L key less entry VIN: 1G1YY32G0Y
2004 Chevrolet Optra 2.0L CD Player VIN: KL1JK52Z04
We have this Chevy Optra (Suzuki Forenza is what it really is) that the radio/cd player is locked out. Customer doesn't have the security code. Is there a way of pulling a scrambled code and phoning it in to get the security code, like a Chevy Theftlock system...
2004 Chevrolet Monte Carlo SS 3.8L brake pedal VIN: 2G1WX12KX4
Apply brakes in reverse good brake pedal. Koeo in stall pedal pump and it has good pedal. Start car and back up car has good brakes. Drive car forward 6 inches apply brakes and pedal goes all the way to the floor. It does not sound like the ABS is coming on no...
2004 Chevrolet Monte Carlo SS 3.8L washers VIN: 2G1WX12KX4
This car has on going problem with windshield washers not working at times. The pump always runs but no spray. I pinched both hoses at windshield and applied vacuum at the pump fitting and held vacuum.Check debris in bottle OK. Replace washer pump and same pro...
2005 Chevrolet Cobalt 2.2L electronic steering VIN: 1G1AK52F95
we have this cobalt that as driving will give a power steering message in drivers message center. In bcm we pulled code u2100 can buss comm and u2111 loss of comm with steering control system, and at the same time will set code in trans for p0742 tcc circuit s...
2005 Chevrolet Silverado 1500 LS 5.3L Unknown VIN: 2GCEK13T25
Greetings, This truck has an issue that occurs on a intermittant basis. He has taken it to a couple of different shops and they told him different things. One said that there was a fuse that has a loose wire, yet I've searched and haven't found nothing. Anoth...
2004 GMC Sierra 1500 SLE 4.3L dome light VIN: 1GTEC14X54
dome light does not work. truck came in with complaint of no dome light and no back up lights. Dome was problem for awhile before backup lights quit. Had codes b2550 & b2615 in BCM. Backup lights were cured by replacing the TBC2A fuse. Still no dome light. Use...
1996 Oldsmobile Aurora 4.0L No Start VIN: 1G3GR62C4T
Vehicle towed in cranks/no start. Vehicle has spark, no fuel pressure, no injector pulse. Power at fuel pump relay, nothing at pump. No communication with computer. Cleaned and repair corroded ground connection at right front of vehicle. Still no start. Checke...
2003 Pontiac Montana 3.4L Poor Idle Quality, Stall VIN: 1GMDU23E33
Vehicle towed in and would start and die. If engine is taken off idle vehicle will try to run and blow smoke like crazy. removed two sparkplugs and they were soaked with fuel. fuel pressure hold steady with koeo and regulator is not leaking. droped tank down a...
2005 Pontiac Wave 1.6L abs VIN: KL2TW626X5
Does any one know which other make can put in scan tool to communicate, Snap ON & Auto enginutiy do not reconize because of being Canadian built only. THANKS BRYON
2005 Pontiac Grand Prix 3.8L traction control VIN: 2G2WP52225
Greetings, This one is owned by a young lady is complaining about the "t/c off" light on the dash comes on. With turning the ignition off and then restarting the engine, the light will be off. Place the trans in gear and move the car a few inches and the ligh...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L Excessive Emissions, Poor Idle Quality, Surge, Stall, Misfire VIN: 1G4GD2210S
lots of replies on fuel injectors, they ohm out good but are bad, replaced fuel injectors with some from regular series 2, car runs good, thanks you for all the help. look forward to returning the favor. :0) Trouble codes: P0171.
2002 Buick Regal LS 3.8L No Start, Cuts out VIN: 2G4WB55K72
Thank you all for all your help.I guess the low mileage and the problem starting after the new cat sidetracked my thinking. The vehicle is fixed,first I cleaned out the throtle body,there was so much carbon build up there that it took me close to half a day to...
1990 Cadillac DeVille 4.5L Excessive Emissions VIN: 1G6CD5331L
Thank you to all who replied. The rich running condition was from the injectors. They appeared to be flowing too much regardless of the on time. Once they were replaced the vehicle's emissions dropped way below standards. - [...]
1991 Cadillac DeVille 4.9L injector pulse width too high VIN: 1G6CD53B3M
injectors 5 were bad and needed replacing thanx to all that gave their time to help & for iatn website good hunting techs
1992 Chevrolet Lumina Euro 3.1L Poor Idle Quality, Stall VIN: 2G1WN54TXN
sorry it took so long. the car is still here. after checking everything mechanical and electrical I'm down to replacing the prom. problem is there was no 2.8 in these years so burning a prom maybe the only way. wish I could have given you a fix but I do appr... Trouble codes: 34 (map sensor circuit low), 44 (o2 lean), 35 (iac error).
1993 Chevrolet C2500 Suburban 5.7L abs module bleeding VIN: 1GNGC26KXP
After a thorough re-inspection of steering linkage & suspension components,which were all good, we tested line pressure at both calipers. pressure was good and equal. This should rule out a problem (EBCM). Back to basics and reinspecting the installed caliper...
1997 Chevrolet S10 2.2L No Start VIN: 1GCCS1445V
First and foremost I want to thank everyone that responded to our problem. This was the first time we had to use IATN and was very happy with the respone we received. We had lots of good info and directions to check. After checking everything we re-checked al...
1999 Chevrolet Venture 3.4L wiper VIN: 1GNDX03E8X
Thank you everybody for the great recomands. Especially, Wade gave me the great idea and Randy confirmed the idea. I replaced the bad motor with the rebuilt one including the module from the NAPA. After replacing the motor, I turn the ign key on and the motor ...
2001 Chevrolet Blazer LS 4.3L Hesitation VIN: 1GNDT13W71
2003 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19T83
Thanks for all the help. I tried using the tilt when it diddn't start while watching the sec. voltage and it flux. I replaced the sec. sensor and ign switch it cured the voltage flux. Thanks again, Mike Trouble codes: P1631 (Theft Deterrent start enable signal not correct), B2960 (Security system sensor data incorrect but valid).
2005 Chevrolet Trailblazer LS 4.2L Stall VIN: 1GNDT13SX5
This one is done. Cleaned throttle body and plates. Reset pcm and hvac modules. Reset TAC. I believe the customer may have jump started the car perhaps with the defroster on and the pcm just couldnt get a handle on the idle. thanks for the input.
2006 Chevrolet Silverado 1500 LT 5.3L 4wd high VIN: 2GCEK13T36
We went out on a limb and installed a 4wd computor and all is well. I do not know why it would not set a code or why the data looked good. I do not know of a test to verify this failure other than if you have these exact symptoms try the computor.
1989 GMC R2500 Suburban 5.7L Won't shut off VIN: 1GKGR26KF8
We still haven't fixed this vehicle. It is going to be a while as we have it parked in the snow. I had tried it with the alternator unplugged prior to the responses and there was no change. Starter wiring checked out. There are some good suggestoins that we h...
1993 GMC Safari SLE 4.3L Poor Idle Quality VIN: 1GKDM19W4P
Hurray it is fixed. The main problem was the egr valve that needed cleaning. Had to clean it a few times cause carbon kept blocking it but all is well that ends well. I cleaned connection to engine temp sensor and all seems to be in order. I want to thank ... Trouble codes: 43 (ecs failure), 34 (map sensor), 51 (prom error), 45 (02 sensor), 42 (est monitor), 41 (cylinder select error).
2002 GMC Sierra 1500 SL 5.3L unknown VIN: 2GTEK19TX2
I have not been able to drive this sense I posted the request. Most of the responses involved the A/C. It still does it with the HVAC system turned off. Yes I know the A/C comp. runs with the defroster on. It also seems to me that if it was the A/C blowing off...
1999 Oldsmobile Bravada 4.3L rear axle? VIN: IGHDT13W9W
Wow! Thanks for all the help everyone! I really got a big suprise on this one. I removed the front driveshaft and took it for another ride. The problem was still there but improved by what i would say is about 75%. A very noticeable difference. I need to close...
2001 Pontiac Bonneville SE 3.8L Excessive Emissions, Stall, HARD RESTART VIN: 1G2HX54K81
we have found that the fuel presure regulator was leaking. And it would only leak when it wanted to so I missed it. I had check it a couple of times and had no fuel coming out then it was. as far as the werd signal out of the icm ??? the old one is running ... Trouble codes: P0172, P0404, P0620.
2000 Saturn LW2 3.0L camshafts VIN: 1G8JW82R5Y
Dan was spot on thanks for the help. It goes number to number by cam, saturn should put more info on this in mithcell.
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