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Professional Automotive Repair Technical Discussions for April 7, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1994 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52L7R Hello This car came in originally with 2 code the low flow and pintle position. The EGR valve was replaced and passages where cleand. The light still on so PCM was changed.Light was off. Customer came back 2 weeks later with ses light on code P0401 low flow EG... Trouble codes: P0401 (EGR flow problem) |
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| 1995 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52LOS Hey Guys Partly Brain Freeze and the lack of tec resouces right now I can use your help ! QDM 1 Failure If I replace ECM What is going to be needed to be checked so I do not take out new ECM ! Thanks for you r help In advance ! Trouble codes: 640 (QDM 1 Failure) |
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| 1987 Chevrolet G10 Chevy Van 5.0L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 2GCCG15H8H Hey guys, starting to pull hair on this one. Vehicle sat for approximately one year after engine was replaced, ran great before that. Client says if extended crank time occurs it will act up, Will stick on high idle when cold and runs great, until 2 or 3 block... |
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| 1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L injector pulse VIN: 2G1FP22P2P this car was tow in start and stall first thing the ignition did not have a pass code key i had one cut by gm.engine start for 2 second and stall fuel pressure is good the scanner show code 41 est open took my snap on advantage and test the ignition module tes... |
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| 1994 Chevrolet Lumina APV 3.8L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GNDU06L5R I got a 1994 chevy Lumnia van with a 3.8 which came in runnung rough and would not idle. we have to keep feathering gas pedal to keep it runnung . Customer has been doing testing on this van him self and now wants me to go behind him and keep cost low.Now I ha... Trouble codes: 341 (Intermittent cam signal), 503 (Dont know), 400 (dont know), 140 (dont know) |
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| 1995 Chevrolet C3500 5.7L Cuts out VIN: 1GBJC34K8S This vehicle will stall on decel & at stand still in gear. IAC count drop to 0 on deceleration and the idle follows. In park the vehicle has perfect idle quality. replaced fuel pump fuel press is at 13.5psi.checked for vacumn leaks with propane,and also cleane... |
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| 1995 Chevrolet Lumina LS 3.4L ps system VIN: 2G1WN52XXS Vehicle came to us with a power steering leak. Obvious leak from pressure hose. Replaced hose, leak gone. Customer complained of whining now. Test drove & verified. Problem was not present prior. Have flushed system twice, adding Wynn's conditioner each time. ... |
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| 1995 Chevrolet Blazer 4.3L Surge, Cuts out VIN: 1GNCS13W4S This vehicle came into my shop 2 Months ago with a no start problem. Found that the it had no fuel pressure but had power going to the fuel pump. Removed and replaced fuel pump and fuel filter. Engine started and ran fine for about a month and a half. Now at t... |
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| 1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W8T This one's for you GM evap experts out there. I have a well kept,never wrecked, blazer from a good customer that sometimes sets a code P0442. At first I went to the motors flow chart, and when I got to the FT PRESS reading on the scan tool, koeo w/cap off I ha... Trouble codes: P0442 (evap system small leak) |
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| 1999 Chevrolet Blazer 4.3L Cuts out, Stall VIN: 1GNDT13W3X This Blazer came to us initially with an intermittent but frequent stall condition. We repaired an open circuit in the ignition primary on the ground side near the coil. We noticed a marginal CKP waveform and replaced the sensor to prevent a failure. The truck... |
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| 1998 Geo PRIZM 1.5L headlights VIN: 1Y1SK5286W car starts & dies out unless park lights are on |
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| 1991 GMC K2500 Sierra SLE 5.7L 2-3&3-4 shifts VIN: 1GTGK24KOM this trans came to me comp. inop. direct clutch burned, direct clutch piston broken in two, rear band burned, and front band slightly burned.went through and replaced all frictions, steels, bands, piston seals & sealing rings. Re-assemble & install only to hav... |
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| 1993 GMC G3500 Vandura 6.2L Excessive Emissions VIN: 2GDHG3IJ5P Hi guys and girls.I need help with this retired school bus.Owner had purchased this vehicle about 8 months ago,we have recently replaced the heads because of a overheating problem and at the same time the owner had the injection pump rebuilt(previous fuel leak... |
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| 1997 Pontiac Grand Am SE 2.4L timing chain VIN: 1G2NE52T1V Hello Techs, hope someone can give me some advice on water pump replacement on these 2.4 twim cam engine. I have done a few of these nightmare water pumps. The second one I did I learned to replace the chain tensioner,shoe and chain. If not you would wind up h... |
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| 1998 Pontiac Sunfire SE 2.2L Hesitation VIN: 3G2JB5243W This car seems have a hesitation most of the time on right turns, only sometimes going straight. It feels like a quick drop in rpm's then its ok. No codes ,no misfires shown, fuel pressure good in the bay .The computer is under the right fender pulled it to ch... |
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| 1997 Saturn SL2 1.9L No Start VIN: 1G8ZK5276V This 97 Saturn SL2 will crank but not start in park but if you put it in neutral it will start. The problem is real intermitent and so far we have been unable to get to act up for us. Has anyone run into this before? |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1991 Chevrolet S10 Blazer Tahoe 4.3L No Start, Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GNCT18Z9M After several attempts we were finally able to check timing on cold start up. Found 10 degress retarded then we would rev engine and timing would return to normal. Checked for timing chain slop and found a ton. Timing gear on camsaft looked like a bicycle spro... |
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| 1994 Chevrolet K1500 4.3L Heater Blower VIN: 1GCEK14Z2R Yes, the new ignition switch had failed only for the heater blower: (orange wire #256)(circuit #300). Also supplies 4wd and brake fuses. The switch had a brownish burned look around the terminal for that wire. Correct me if Im wrong; but I assume the problem w... |
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| 1994 Chevrolet Camaro 5.7L code 84 after following your suggestions a pcm finally fix problem. |
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| 1998 Chevrolet C1500 Cheyenne 4.3L MIL Lamp on VIN: 1GCEC19W7W okay people i am not a butcher, customer requested gut the convertor, here in manitoba canada, we have no emission laws. he did not want to pay the price at that time, now we put a convertor in from gm. thanx. |
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| 2001 Chevrolet Blazer LS 4.3L Surge, Misfire VIN: 1GNDT13W11 You know I've been fixing cars a long time and I still find myself learning. I was pretty sure that the cat was plugging All I wanted to do was verify it before sending it off to the dealer. I would have never guessed the warranty would be voided by taking a l... |
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| 2001 Chevrolet Express 3500 8.1L rear brake shoes VIN: 1GBJG31G31 thanks for your input but i haven't found anything to cause this problem i put new shoes and wheel cyl's turned the drums i used a different brand of brake shoes now i will wait and see what happens |
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| 2000 GMC Sierra 1500 SL 5.3L security system VIN: 1GTEK14T14 3 replies, One told me how to perform the passlock relearn procedure. Others said it may be a comunnication mis-match between the BCM and ignition switch. We have tried the relearn but problem still exists. This truck belongs to my brother,he says it is workin... |
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| 2002 Oldsmobile Alero GL 3.4L front hub, drive axle, transaxle, wheel, tire VIN: 1G3NL52E52 Thanks to all that replied! Altimately it was the OE Goodyear Eagle RSA tires that caused noise problem. After prompted by a few replies, I found the TSB in my [...] for this symptom. I looked before for TSB's, but this one I guess was not classified for a ... |
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| 2001 Pontiac Grand Prix SE 3.1L shifts VIN: 1G2WK52J41 Of the 24 replies all said pressure control solenoid and or valve body. Thanks for all the replies. I replaced the valve body with a reman from GM and also a new pressure control solenoid. Customer said the long cold shift and hot shifts were gone. Thanks agai... |
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