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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 24, 2005
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L No Start, Cuts out, Stall VIN: 1G4HP52L7S
Intermittant no start, intermittant start and stall, intermittant stall. Most times this vehicle runs ok. When the no start occurs, the cam/crank error pid counts up. When it starts, check pid cound does not increase. Scoping the cam and crank signals from icm... Trouble codes: 341 (cam/crank error)
2000 Buick Regal LS 3.8L HVAC 10A fuse VIN: 2G4WB55KXY
This car has blown the 10a HVAC fuse several times before the customer brought it in- first thing this morning, the circuit only had .4amp draw- drove car around & ran ac & heater- still only .4 amp draw- after sitting over lunch in 95deg. heat, the draw was b...
1989 Cadillac Eldorado 4.5L both abs & brake light on VIN: 1G6EL1154K
well guys this one has got me. my customer call the shop with a my brakes dont work. and sure enough there is no power assist. both brake and anti lock lights are on all the time we tried to pull codes unsuccessfully manually and with our modis both lights sta...
1989 Cadillac Eldorado 4.5L MIL Lamp on VIN: 1G6EL5788F
check engine light stays on with code 51, prom error. code comes back immediatly after being cleared and engine restarted. we have tried 2 different rebuilt computers and 2 different proms from gm. we have checked all the powers and grounds to the computer. we... Trouble codes: 51 (Prom Error Code)
1990 Cadillac Eldorado 4.5L a/c,bcm VIN: 1G6EL1339L
Tech in our shop replaced compressor,drier,orifice tube,added 3oz of oil,evacuated & recharged system with r-12.Delivered car & 2 days later customer returned with code #b447=low refrigerant.Searched for service bulletins and found about updated prom for this ...
1984 Chevrolet S10 2.8L No Start VIN: 1GCCS148LE
This should be very simple, but something is fooling us. WE have checked for wave form on lab scope for pup and get good waveform. Module has 4 terminals: +, coil and 2 for the pup. If you put fire to + , hook up coil terminal to coil side Neg of coil and turn...
1993 Chevrolet Camaro 3.4L Misfire VIN: 2G1FP22S1P
this car develops a miss at all speeds when warm. this miss comes and goes. i have only seen this vehicle have a hard miss single cyl once. other times it will miss once and come back to life. scoped ignition and found nothing. when it had a hard miss i notice...
1994 Chevrolet P30 Box 5.7L Drive train VIN: 1GBGP32K2R
Hello Techs, I have got a nasty decel vibration on this box truck. It occurs when you let go of the throttle above 40 miles per hour. It seems to come from the rear of the vehicle. There is no vibration below 40 or at all on accel. A light touch of the gas pe...
1995 Chevrolet Camaro Z28 5.7L compressor controls VIN: IG3F29P1LD
This is the exwifes car used to be mine,,,well i miss the anyhow.Ive been trying to fix this thing over the phone ,basic diagnostics have been done no codes r134 level ok ,compressor clutch fuse and relay ok...this car instead of having a low pressure sensor h...
1999 Chevrolet Astro 4.3L Speedo, ABS, trans VIN: 1GKDM19W1X
Hi all, and thank you in advance. . vehicle came into the shop with the speedo intermitantly droping to zero, Transmission not up shifting and setting an abs code C0237. Unfortunatly i got tunnel vision and only focused on the abs code, followed the tests on a...
1999 Chevrolet Tahoe LS 5.7L 4x4 actuator motor with out electronic controls VIN: 1GNEK13R7X
I can't find trouble shooting info on this proublem
1999 Chevrolet Silverado 1500 5.3L temp gauge/electrical VIN: 1GCEK19T2X
This vehicle will over heat within minutes. Temp gauge will peg and motor will shut down. The motor never goes above 217 degrees. the scanner is reading the computer which is seeing what the gauge reads. I replaced the ect at first. now I have done it 3 times....
2000 Chevrolet S10 4.3L MIL Lamp on VIN: 1GCDT19W6Y
We replaced the fuel pressure sensor and cleared code, mil lamp came back on immediately, cleaned ground on left rear rail, checked the computer pin for corrosion, pin was clean. Would appreciate any ideas of what would continue to trip this code. Thank you. Trouble codes: 0452 (Fuel pressure sensor circuit - low voltage)
2000 Chevrolet Silverado 2500 6.0L Differential VIN: 1GCGK2U4YE
we replaced switch due to intermintent 4 wheel drive engagement. did not fix problem one of our techs probed the wiring to transfer case. now we have a 4 wheel light on and code number is c0327 encoder circuit all fuses seem good and relays can some one tell m...
2000 Chevrolet Suburban 1500 5.3L tensioner moving too far VIN: 3GNFK16TOY
Hi everyone. It seem like a easy problem to fix. This Suburban came with a a/c belt come off and been cut. It is a system with 2 driver belts. One inside and small only for a/c another one for the rest ( P/s, alt,Wp )We checked a/c comp and tensioner pulleys a...
2001 Chevrolet S10 2.2L Hesitation, Stall, MIL Lamp on, HIGH IDLE VIN: 1GCC14581K
codes p0108 and p0122 found in freeze frame. engine always idles high and erratic (worse with ac on). engine sometimes bogs and dies when leaving from stop, will always restart but idle shoots up to about 3800 rpm then slowly returns to the slightly high idle ... Trouble codes: P0108 (map sensor circut high input), P0122 (tp sensor circut low input)
1993 Oldsmobile 88 Royale LS 3.8L Misfire VIN: 1G3HY53LXP
Car came in this time for a tune up due to slight miss upon acceleration. Would run fine for about 5 mins at start up, then would act up. Before doing tune up I checked plugs and of 6 4 were white the other two were black. Replaced plugs with AC Delco, wires w...
1995 Pontiac Grand Am SE 3.1L No Start, Cuts out, Stall, MIL Lamp on VIN: 1G2NE55M3S
The problem I am having is the engine shuts off, hard starting, SES light flashes when engine is being crank over. This all happens within a few seconds or 2 to 3 minutes intermittently. DTC 36 24X lost signal has been stored in memory for 2 years with no driv...
1997 Pontiac Sunfire SE 2.4L daytime running lights and headlights
performed gm flow chart,checked for voltage at relay,and ground,check good.with scan tool drl does not switch on,drl ind.in dash flashes,after put in gear,no drl's.headlights when selected lft side only glow on high or lows,rgt side op check normal on low&high...
1998 Pontiac Grand Am SE 2.4L overheat VIN: 0125689742
hey guys I was reading closed with fix section last night and a close caught my attention.does anyone know what an air lift is?one of you had a problem bleeding air out of a pontiac grand am and he used an "air lift"to remove the air.I run into this quite ofte...
2000 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NF52T8Y
Hi guys(and gals). I need some help here. This car originally came in on the hook. It was an inermittent no-start, but this time it just wasn't going to go any more. There were never any codes in this car and the driver says she has never seen the check engine...
2000 Pontiac Grand Prix GT 3.8L overheating VIN: 1G2WP52K9Y
This car runs about 245 to 255 degress whet ambient temp is above 80 degrees while in traffic, when in clean air temp comes back down. It seems to me that is a air flow problem, but when fans are running air is pulled with good force through the grill. Could t...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Chevrolet S10 Blazer 2.8L Poor Idle Quality, Hesitation VIN: IGNCSI8ROJ
Thank God! this vehicle is fixed. there were two problems: Pat gave good advice on the bosch platnium plugs. you are a mind reader. the owner had installed these plugs and one was bad. put ac-delco in and backfire-pop up thru TBI went away. still had hesitatio...
1988 Chevrolet C1500 Cheyenne 5.7L Cuts out
Thanks to everyone who called in. I checked fuel volume plugwires , vacuum and backpressure on exhaust.Before doing any further testing the customer called in and told me the problem started after filling up with gas.The gas station he filled up at has had pro...
1990 Chevrolet Corvette 5.7L Temperature gauge VIN: 1G1YY33801
I have been unable to get the customer back in for further diagnosis and have been prompted to close this request by iATN. I still hope to get another crack at it and will post additional information if I do. It seems most of the responders did not carefully r...
1991 Chevrolet Corvette ZR-1 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire VIN: 1G1YZ23J0M
1st. i would like to thank all of you for your help. it was 2 more injector (4all together) and another new yes new wire set thanks
2001 Chevrolet Silverado 2500 HD 8.1L main seal ??? VIN: 1GCHK23G01
Good morning I have not had a chance to repair as customer has yet to return, I have talked with him and problem is occuring less as time goes by. Most replies had to do with checking pcv valve or blocked vent to pcv. Thank you trying to help and if he ever ...
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