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Professional Automotive Repair Technical Discussions for March 30, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1995 Buick Century Special 2.2L Unknown VIN: 1GN4AG5545 when the car gets warmed up it shakes and stalls.when you put the car in n it stops if you leave it in gear it stalls |
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| 2000 Buick Regal LS 3.8L No Start, Hesitation, Cuts out, Stall, Misfire VIN: 2G4WB55K8Y Hi everyone, Car came in on tow, no start, no fuel pressure, no power to pump. Found blown fuse, test drove, blew a few more fuses, installed new fuel module from gm. Starts, runs smooth, no misfire. As car get hot, misfire monitors start moving and more unde... |
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| 1994 Cadillac Seville STS 4.6L Surge, Stall VIN: 1G6KY5299R has a severe surge from about 500 rpm to 1500 rpm at idle, while driving feels fine. using onboard diag. has code po35 followed flow chart on that code says intermittent cleared code several times keeps coming back Trouble codes: P0035 |
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| 1990 Chevrolet Corsica LT 2.2L Poor Idle Quality VIN: 1G1LT54G4L idles at 3000 rpm. there is no vacum leaks. the idle air valve will not move. customer replaced valve. the computer shows it going to 0 counts, but the valve does not respond.it has volt. to it. koeo shows 140 counts. im thinking it has a wiring problem. has a... |
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| 1994 Chevrolet K1500 4.3L Heater Blower VIN: 1GCEK14Z2R Hi all, and thanks for your help in advance. I have no power at the 25 amp heater\AC fuse with the key on, or in the acc. position. My wiring diagram doesnt show where the power to the fuse comes from. I think it comes from the ignition switch but am not sure.... |
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| 1995 Chevrolet Corvette 5.7L Unknown VIN: 1GYY22P8S5 when the vehicle is driven the service ltpws( amber light will illuminate in the center console) will come on. theis will occur over bumpy roads , heavy acceleration ,will go out if you slam on the brakes , or tap on the master. there is not a serviceable swi... |
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| 1998 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W6W Would like to know if scanner should show injector pluse width on cranking---I am using snapon scanner. Also where is the timing marks on the balancer--cant see them---engine cranks good , lots of fuel and spark. sometimes it back fires thru intake like out o... |
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| 1998 Chevrolet S10 4.3L No Start Hello all, Today i am working on this S-10, the problem occurs after the truck has been running for 5 to 10 minutes,turn the engine off and when you go to restart it the fuel pump will not run. The owner has replaced the fuel pump and the relay but the proble... |
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| 1999 Chevrolet Malibu 3.1L Misfire, MIL Lamp on VIN: 1G1NES52M4 Hello all you GM Masters, We have a vehicle here that is causing me to pull out what little hair I have left. This Vehicle came in with a coolant leak at the intake gasket. We replaced the intake gasket & found that the # 4 & 6 intake valves were bent. So we r... Trouble codes: 0300 (Random cylinder misfire) |
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| 2000 Chevrolet Express 1500 LS 5.7L kick back hard start VIN: 1GNFG15R8Y Vehicle was towed in to shop with grinding noise when starter was engaged. Starter and the Flywheel were then replaced. The teeth on flywheel were in bad shape looked like customer was tried to start with a bad starter in vehicle for quite a while. After repla... |
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| 2001 Chevrolet Silverado 3500 6.6L Hard start VIN: 1GBJK34161 Anybody here using an OTC Genisys with Pathfinder '03? I ordered the update to cut cylinders on this truck (Duramax Diesel) because their tech support told me it would work. When I got the update, it was in the menu but wouldn't cut the cylinders, instead it g... |
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| 1999 GMC Sierra 1500 SL 5.3L 4wd/2wd VIN: 2GTEK19T5X CODE 387 unable to complete shift. When trying to shift from 2wd to 4wd, the light blinks on 4wd and remains in 2wd. After trying for a bit, eventually the shift is made and 4wd lite stays lit and truck is in 4wd. In other words I push the 4wd button after ea... |
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| 2000 GMC Jimmy SLE 4.3L Misfire, MIL Lamp on VIN: 1GKCS13WOY we have this gmc jimmy that runs fine on idle but when you try and drive it it misfires big time till you back off the gas and then it will run fine for a while but when its doing it it has no power and misfires big time it sounds like the enging timing is ret... Trouble codes: 171 (air flow meter), 174 (air flow meter) |
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| 1984 Oldsmobile Cutlass Ciera Brougham 3.0L Poor Idle Quality, VIN: 1G3AM19E3E Hi Techs, Need some help on this old unit. Rebuilt carburetor and I'm having trouble locating information on how to set the mixture control solenoid unit height. It rides on the lean mixture screw. I know that I should have bottomed it out and counted turns... |
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| 1998 Oldsmobile Intrigue 3.8L Lighting VIN: 1G3W552K4W Hi groupe. we got an oldsmobile intrigue.the problem is during turn signal use, corner lights does't come on,left or right:any help on this w'll be appreciated much: thank you |
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| 1999 Oldsmobile Silhouette Premiere 3.4L Tail Lights, Turn Signals, Back up lights VIN: 1GHDX03E3X This vehicle came in with the rear lights acting strangely. The Brake lights work fine when the ignition switch is off and the headlights or running lights are off. If any of these are on and the brake pedal is pushed, the indicators for the turn signals both ... |
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| 1993 Pontiac Grand Am SE 2.3L oil VIN: 1G2NE1133P read above |
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| 1996 Pontiac Bonneville SE 3.8L Climate Controls VIN: 1G2HX52K8T Customer brought car in stating A/C inop. Verified to find compressor turns on when commanded by electronic climate control center but vacuum motors do not respond to commands. All air is routed through heater core and is blowing to defrost. Found good vacuum ... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1989 Buick Skylark Limited 2.3L Excessive Emissions VIN: 1G4ND54DXK thanks to those who replied. based on some of the suggestions i looked at some other things, tune up parts looked good o2 was fine, converter would not get hot it was an aftermarket weld on one. i recomended replacement. we do not have a welder so i had to sen... Trouble codes: 43 (knock senser code. senser test good). |
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| 1991 Buick Skylark 3.3L Poor Idle Quality, Hesitation, Misfire VIN: 1GNC54NXXM i replaced intake gasket,pcv,ignition wires,and cleaned the mass wires. also chk smoked for vac. leaks.. i still have this rough idle (raelly rough) but ths. for all the help!!! bob |
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| 1998 Buick Regal 25th Anniversary Edition 3.8L MIL Lamp on VIN: 2G4WF5210W Hi, The car has not came back. I have to close this now or face a bad report card from IATN. Had 10 replays..Check the super foe vacum leak @ front. Check air defuser to see if a throttle plate cleaning in past wrecked it. And 02 sensor bad. Thanks for the hel... Trouble codes: P0171. |
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| 2001 Buick Regal GS 3.8L steering wheel VIN: 2G4WF55171 Received 6 replies and all were related to new and redesigned power steering lines. Installed new lines and the problem went away. Thanks for all of your help. |
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| 1987 Chevrolet S10 2.5L Stall, MIL Lamp on VIN: 1GTDEX1EYH thanks for the replies but I figured it out myself and I am a liitle mad with myself and snap-on. I entered the truck as an 88 model into the scanner and voila, the data was now accurate. This was a snap-on scanner. The customer did complain of the check eng... Trouble codes: 25 (IAT sensor high / Sorted circuit). |
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| 1990 Chevrolet C60 Kodiak C6H042 6.0L Hesitation, Surge VIN: 1GBG6H1P5L sorry for the delay!! I did get replies on the fuel pressure spec's from Lee [...]. I want to say thanks for that. I also found spec's from another shop that had Mitchell the spec's are 26 to 36 witch correlated with the replies. I ... |
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| 1994 Chevrolet C3500 6.5L Poor Idle Quality VIN: 1GBKC34F4F Thanks to all for the replies on this diesel pick-up. After more extensive circuit testing and running external wires to the PCM I replaced the PCM and PROM with the latest updated versions and now it starts fine |
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| 1997 Chevrolet S10 LS 2.2L Excessive Emissions, Poor Idle Quality VIN: 1GCCS1942V thanks for all the replies. thanks to kevin for his insight,i pulled the egr plate off the back of the head and found that my tech had put on the wrong gasket. i put the RIGHT one on and it ran great. if you ever do a 2.2 head gasket make sure you look at the ... Trouble codes: P0300. |
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| 1998 Chevrolet Blazer 4.3L duct mode/s VIN: 1GNDT13W4W Many thanks for the replies from Tom from Missouri, Jim from northern California for the faxed disassembly procedure, Vincent from Ohio and especially Adam from Kentucky. As stated in my upodate the defrost lever was broken and not moving the blade valve. The ... |
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| 1998 Chevrolet Express 1500 5.7L Coolant VIN: JN1CA31D91 Recived many replies on how to flush the system. Dont know if the van is fixed yet will be coming in soon. Time is running out for post we added ceramic to coolant system Moroso Part # 35520 & also added UV Dye to oil to see if its left over oil or still getti... |
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| 2001 Chevrolet Impala LS 3.8L battery light. day drivind lights.back-up lights a VIN: 2G1WH55KX1 the problem was the bcm thanks to all that replied. the car had 36523 miles on it and the dealer warrenty the repairs. thanks again mac |
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| 2000 GMC Yukon SLT 5.3L pulling right VIN: 1GKEK13T6Y Hello Iatn members, Another happy customer thanks to all your help.I apologize for the length of time it took to post this fix but I wanted to make sure the vehicle was fixed and the wind has been very bad making it hard to tell if this wind sail vehicle was... |
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| 2002 GMC Sierra 1500 SL 5.3L temp gauge, Passlock VIN: 2GTEK19TX2 Hello all, This truck is fixed! Thanks to those that replied to my request. Some suggested ign switch, crank sensor, and reprograming PCM. After triple checking these suggestions and everything else I could think off. I decided to open up PCM for a look. I f... |
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| 1997 Oldsmobile Aurora 4.0L Oil in coolant VIN: 1G3GR62C1V Thanx to all the folks that replied. Because of the tip, we have discovered that it is transmission fluid in the coolant, not oil. We're still not going to fix it, but sell it off as is. Visit next month if you're interested in such thing... |
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| 1992 Pontiac Grand Prix SE 3.4L Unknown VIN: 1G2WJ51X7N Thankyou for the overwelming responce I received 23 replies. Most said to hang the engine and remove the subframe, also to hang the steering rack.We did this and the trany is now at the trany shop.Thanks again for all the replies. Ken |
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| 1999 Pontiac Grand Am SE 3.4L Steering VIN: 1G2NE52E7X After several hours of testing and hair pulling we finally came up with a solution. A previous mechanic had replaced the drivers side wheel bearing with an aftermarket wheel bearing. This bearing would work fine 70% of the time but under extreme loads the be... |
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| 2001 Pontiac Aztek 3.4L tailgate release VIN: 3G7DA03E61 replaced the body control module (mounted under gear shift in console)-then calibrated the new module with tech2 -all works fine-all of the posts I recieved supported my decision-as always thanks to the dealer techs for sharing their experience and expertice w... |
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| 2000 Saturn SL2 1.9L airbag light on VIN: 1G8ZK5275Y thanks for all the replies- the code B1001 indicates that the new sdm (airbag module) didn't have the vin programmed into it and wasn't being recognized by the bcm- the fix was to have the dealer reprogram the sdm and all is well- gm has a bulletin addressing ... |
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