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Prev Professional Automotive Repair Technical Discussions for January 25, 2005
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Open Help Requests for GM
Help Request Answers
1992 Buick Century Custom 3.3L abs module VIN: 2G4WS52J42
the car came in with an abs light on, "code c1233 traction control systems" we trace it down to a speed sensor on the drivers front wheel. after replacing the speed sensor and clearing the code, the abs light is still on. we notice that it would only come on w...
1993 Buick Century Custom 3.3L Cuts out, Stall, MIL Lamp on VIN: 1G4AG54N7N
This Buick came in mainly for a stalling problem, and some brake/ts bulbs out. I changed the bulbs then went to the stalling problem. I found codes in memory for TPS, CTS, and one quad driver(code 26). Monitor showed tps not changing while trying to adjust it,... Trouble codes: 26 (Quad driver code I replaced lockup solenoid in trans gone now)
1981 Cadillac DeVille 6.0L check engine light VIN: 1G6AD4790B
HI guys, this vehicle runs fine and has no drivability complaints. Intermittantly after driving up a hill just as youcrest the top and start backing off the throttle the check engine light flickers then goes out. NO codes are recorded and all scan data appears...
1988 Cadillac DeVille 4.5L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1G6CD515XJ
Hi Everyone, I don't know what to think about the trouble codes I got from this car. Using the method that displays the codes with the fuel center lights, I got E13, E23, E52 and F48. Using my scan tool plugged into the ALDL I got 53, 55, 56, 57, 59, 62 and 63...
1997 Cadillac DeVille 4.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G6KD54Y1V
The car was towed in as a cuting out issue. The car cranks then fires up with a bad miss than backfires out of the intake. some times it will rev without a miss than when the rpms drop down it backfires out of the intake and shuts off. It has spark, injectors ...
1987 Chevrolet Caprice Classic LS Brougham 5.0L part lost VIN: 1G1BU51H9H
I am in the process assembling this Quadrajet and can't locate the plunger for the TPS, It is probably in the guys back yard. What I need to know is the dimension of this and I can make one. The diameter is about .200" Ijust need the length. It goes under the ...
1995 Chevrolet S10 2.2L Hesitation, Surge, Cuts out VIN: 1GCCS1442S
hello everyone, i have this 1995 s10 pickup and when at normal operating temp., this truck will fall on it's face, loose power and will not accelerate.it feels like it is running out of gas.i checked the fuel pressure and it was low. i replaced the fuel pump,s...
1996 Chevrolet S10 LS 4.3L Cuts out, Misfire, Poor Fuel Economy VIN: 1GCCS19X3T
thanks for all the help in advance. the problems started approximately 6 month ago. we replaced the injectors and fuel pressure regulator and plugs and cleaned egr valve. 2 months later back again same problem flooding... same thing over again...injectors, pre... Trouble codes: P0300
1996 Chevrolet Cavalier 2.2L heater output VIN: 1G1JC124XT
Hi This caviler has a problem of not maintaining operating temp. on long road trips. Belongs to college student whom drives around 1.5 hours to and from school on the weekends. Last week when she drove home she had no heat and said the temp gauge was hardly re...
1998 Chevrolet Astro 4.3L rotors VIN: 1GCDL19W3W
Hi group, this van came to us needing brakes all the way around and was pulling left when braking. After brake job still pulls left. Replaced both front calipers, no change. Thought that a hose might of collapsed, replaced both of them, no change. Found idler ...
1999 Chevrolet Silverado 1500 5.3L water pump VIN: 1GCEK19T6X
when the noise starts it gets real loud and if listen at the water pump snout it's loud there but you shut engine off and re start noise may not come back
1999 Chevrolet C2500 Suburban 5.7L unknown VIN: XGMXTO5.71
Hello GM techs, Being a foreign car shop, we don't have any experience with this vehicle--it belongs to a friend, so we're doing some diagnosis. On cold start the engine knocks fairly loudly for 20-30 seconds (with ambient temp below 30 f). It sounds like a b...
2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GCEK14T1Y
This truck has cold running problem, surges and poor idle quality, what is dificult is my scan tool will not comunicate with the vehicles pcm,not any of the controll modules on the truck,. All I get on the screen of my scanner is, can not comunicate with pcm. ...
2001 Chevrolet Express 1500 4.3L Neutral Shift VIN: 1GCEG15W91
This is a strange one and I have not been able to find any TSBs or anything pertaining to this problem. When you shift from reverse or drive into neutral, you hear a high pitched squeal/pop noise. It won't make the noise when shifted to park. If you have one ...
2001 Chevrolet Silverado 3500 LS 6.6L Speedo Inop, Trip Meter Inacurate VIN: 1GBJC34191
Cust tells me his speedo hasn't worked in over a year and jsut recently his trip meter started to act up. Not reading the correct mileage. He stated that he just came back from a 140 Mile trip and his trip meter only reads 77 mi. I checked the cluster for code...
2003 Chevrolet Silverado 2500 HD 6.6L entertainment VIN: 1GCHK23143
Vehicle is equiped with UQ7 w\o Y91 BOSE audio system. Truck has a serious draw at the amplifier located under the center console, if I unplug connector C2 from the amp my draw disappears. C2 consists of Battery positive voltage, ground, left subwoofer +, left...
1995 GMC G3500 Vandura 5.7L Excessive Emissions, Poor Idle Quality, Stall, MIL Lamp on VIN: 1GTFG35K2S
we have discovered that we have 4.12 v at idle to map sensor, but we have a pulsing vacuum it seems like, can apply vac with guage and volts drop to normal but runs bad. we have no vac. to baro sensor from throttle body, is that the prob? putting new gaskets o... Trouble codes: 34 (map high voltage)
1997 GMC Jimmy SL 4.3L interior lighting VIN: 1GKDT13W6V
Hi all we have a jimmy that the interior lights stay on. We found that the interior light module is part of the remote function acuation module, we are looking for a wiring diagram/diagnostic chart for this component. Alldata shows seperate modules. Any help o...
2001 GMC Yukon XL 1500 SLE 5.3L Transmission 2-3 shift VIN: 1GKEK12T91
vehicle came in with a intermittant hang in second gear, I suspected it was "in limp mode". started vehicle and found no SES light and Client verified that SES had not came on before this. I test drove the vehicle with the Client to verify the problem. after a...
2002 GMC Yukon XL 2500 SLE 8.1L Battery VIN: 3GKGC26G42
Hello Every one, I realy hope someone can help with this problem. This is a limo,I have talked to the limo manufactor and they say the problem is not in the back. We removed the power cable to the back and still have the problem. Ok now the problem the battery...
1992 Oldsmobile Cutlass Supreme S 3.4L alternator VIN: 1G3WH14X7N
customer came in last week with vehicle towed in, his specific complaint was that he drove it for about ten miles the car died out while driving and would not crank over, he tried jump starting but the vehicle would not stay running. so one of my fellow techs ...
1996 Oldsmobile Aurora 4.0L No Start VIN: 1G3GR62C9T
The customer complaint is an unsual message that is displayed across the driver's information center..."cleaning key wait 3 minutes to start". The condition is becoming more appearent to the customer, but is not reproduceable here in the shop. There are no cod...
1999 Oldsmobile Intrigue GL 3.8L Accessories VIN: 1G3WS52KXW
The flow chart tells you to turn switch to run,turn the wiper switch to off,Disconect wiper switch conector C203. If the wipers don't park. the switch is bad. Im not totaly confident in this procedure. The switch is 152.00 bucks.Do any of you guys have any exp...
1994 Pontiac Grand Am GT 3.1L coolant temp VIN: 1G2NW55M8R
After installing intake gaskets and thermastate , we have a temp problem . I do not know if this car had this problem before . It was low on coolant and had been sitting for a year not being driven . At idle the car holds around 195 no problem . If you hold it...
1996 Pontiac Grand Am SE 3.1L cooling system VIN: 1G2NW12MOT
Hello fellow techs.I'm having a very difficult time trying to verify source of coolant leak.It appears to be from right front head gasket or timing cover.I've removed front engine mount,P.S. pump,alternator and brackets-but the timing cover raises up at the ex...
2004 Pontiac Grand Prix GT2 3.8L remote keyless VIN: 2G2WS52214
Does anyone know a way to program an additional keyless entry transmitter,I have one working original.I do not have a tech II.Have Modis but don't see anything in it.
1998 Saturn SL2 1.9L trans line blows out VIN: 1G8ZK5274W
Car came in on hook with top trans line out of the quick connect on trans. replaced connector with oem from saturn and sent customer down the road. One month later car is back with the same line out of the connector. does anyone have a fix or suggestion other ...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Century Custom 2.5L No Start, Backfires VIN: 1G4AH51R2K
Spark plugs fixed it, turns out the relatively new set were just to fuel fouled to fire. Seems like at times its what you least expect. Thanks to all for the excellent suggestions, now I can sleep tonite.
2000 Chevrolet S10 2.2L oil psi VIN: 1GCCS1943Y
Well I had some nice replys. Customer had me put Motorcraft 30wt oil and quart lucas in it. Oil psi now is about 18-20lbs at idle. He just bought this vehicle from like a cousin who deals in used cars. The cousin sold it for someone else who probably knew it w...
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
Sorry about the long wait for the fix. The customer declined any further repairs. I thought about it for a while and realized i put thread tape on the ect. This messed with the ground and caused some of the intermitent problems with the gauge. I was unable to ... Trouble codes: P0128 (Engine coolant temperature below thermostat regulating temperature).
2002 Chevrolet Express 2500 5.7L MIL Lamp on VIN: 1GCFG25R62
We purchased the Genisys scanner assuming that it could then perform the crankshaft sensor variation relearn procedure. It was not successful. Being pressed for time I ran it over to a Chevy dealer where a buddy worked and it was done in two minutes with a Tec... Trouble codes: 1336 (CKP system variation not learned).
1999 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3NL52T4X
hi guys , i got alot of ideas on this one.some said to check the vacuup hose at the map senor,someone said that the intake manifold gasket was coomon problem on quad fours,one ideas that i would of never thought of is the oil relief valve sticking causeing hig... Trouble codes: 0180 (map sensor high).
1995 Pontiac Grand Am SE 3.1L unknown VIN: 1G2NE55M65
I had 24 replies. 8 said headgasket. The top reply. It seems small, hard to detect, head-gasket leaks are common to this motor. Broken & loose head bolts also seem to be a problem. We preformed a cylinder leakage test, which still left us without proof. Three ...
1997 Saturn SC2 1.9L cooling system VIN: 1G8ZG1271V
Thanks to all that replied. I installed a new saturn t-stat and problem seemed to get better. When very cold outside I put on recirculation door. This helped even more. Customer is very satified with temp in car.
2001 Saturn SL1 1.9L Misfire, MIL Lamp on VIN: 1G8ZH52821
thanks for all the help on this one. We did end up replacing intake gasket which was what most everyone was pointing to. Trouble codes: P0300, P0301.
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