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Prev Professional Automotive Repair Technical Discussions for June 20, 2006
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L Not sure VIN: 1G4HP52K1X
The car makes the noise when you turn right only and sound like it is on the right side.It is kind of a tinny noise. If you do circles it will keep making the noise we got under the hood did circles with a stethascope listened to about every thing under the ho...
2001 Buick Century Custom 3.1L Surge, Misfire, MIL Lamp on VIN: 2G4WS52J71
I did a cylinder head gasket about a year ago on this vehicle because intake manifold gasket was leaking into cylinder. Today vehicle came back for multiple problems. Customer complain vehicle misfire during accleration, lost of power, and delayed shifting. I ... Trouble codes: P0300
1998 Cadillac DeVille d'Elegance 4.6L compressor VIN: 1G6KE54Y1W
thanks all for your time i have an 1998 caddy that we installed new compressor drier and orface tube the customer complained of loosing charge after 1 week hooked gauges up and found system to be over charged recharged system to specs and found low side pressu...
1994 Chevrolet C1500 Cheyenne 6.5L MIL Lamp on VIN: 2GTEC19S4R
Looking for some info on how to get the fsd calibration pack out of the fuel solenoid driver on hte side of the pump. We are going to install a remote fuel solenoid driver on the intake with a new module. It is the main problem with these injector pumps on gm ... Trouble codes: 35 (pulse injection error)
1994 Chevrolet C1500 Suburban Silverado 5.7L unknown VIN: 1GNEC16K4R
My wife picked up son said it didnt really get stuck in the gravel (?) Full of clean fluid. Makes noise at times in all gears and just now in park. Had to rev it up to engage reverse with a clunk. Its a 2 wheel drive. What could it be? converter? or electronic...
1995 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC1248S
The vehical came in for a dieing condition.Cel on.Attemped to scan computer, scanner wouldnt power up, Found blown fuse. Replaced fuse, now scanner works, 3 codes, 13 o2 senser ckt open ,shorted or bad 33 map sensor too high 27 quad driver b fault tested th... Trouble codes: 27 (quad driver b fault)
1996 Chevrolet C1500 Cheyenne 5.7L a/c control pannel VIN: 2GCEC19R8T
I keeps shorting out the a/c control unit. I've used my power probe and acuated all the door acuator(blend door, tempeture door, front mode door) they all seem to work correctly. We've also replaced a few of the control pannels because they keep shorting out. ...
1996 Chevrolet Blazer 4.3L heater/ac blower fan VIN: 1GNDT13W2T
The high speed fan cutting out momentarily has been an intermittant problem for a couple of years. The blower motor has been replaced twice as has the switch panel. The fan usually stops then immediately comes back on. When I've replaced the blower motor or th...
1998 Chevrolet Lumina 3.1L 3-4 shift VIN: 2G1WL52M2W
2-3 shift seems normal. 3-4 shift will only shift at 4500 rpms or greater. If let up on gas pedal will shift right away. Note the 1-2 shift solenoid does not shift on scan tool from off to on until let up on gas pedal. Question is? Is the trany being told not ...
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, MIL Lamp on VIN: 2GCEK19R9W
this truck has a misfire-rough road code. Going through data stream it is #5 continually misfiring. Changed plug and wire. Have constant spark and idles the same with the wire off.Today pulled off the upper intake and reconnected the fuel and wiring to the inj... Trouble codes: 300 (misfire)
2003 Chevrolet Astro 4.3L drive train VIN: 1GNEL19XX3
Hello Fellow techs, I have run across an unusual hard to diagnoise vibration. This van is a AWD Chevy Astro Van. It will begin at 60 mph and higher. Will continue to be preseant when shifted onto neuteral.Deacceleration or braking combinations have no effect. ...
2001 GMC Savana 2500 5.0L Poor Idle Quality VIN: 1FTGG25M11
Hi guys got this GMC van here with these 2 codes I have never seen the P0507 code and I was wondering if anyone else has ever seen it and what do I need to do to repair the vehicle. The random misfire code I am suspecting that the vehicle needs plugs and wires... Trouble codes: P0507, P0300
1997 Oldsmobile LSS 3.8L Starter VIN: 1G3HY52K5V
Hi all and thanks in advance,This is my wifes car,it has a intermittent no crank/no start. secuity light was staying on while driving.Last time it didn't start there was no power to the purple wire on the starter while atempting to crank.I looked under the das...
1997 Oldsmobile Achieva S 3.1L No Start VIN: 1G3NL52M3V
starter cranks engine fires and dies. instument panel does not power up,daylight running lights do not light up,shift indicator light on consel out. If ignition is left on for five or ten minites every thing lights up starts and runs ok. checked and replaced i... Trouble codes: P1573, P1629, P1641
2002 Oldsmobile Alero GLS 3.4L ABS module VIN: 1G3NF52E62
Hello we rebuilt transaxle assm., unit works well, but "BRAKE" "ANTI-LOCK" and "TRAC OFF" lights came on. Code set in PCM is U1040 Loss of EBCM/EBTCM communication. Also 2 codes set in ABS system: C1254 Abnormal shutdown detected. C1298 PCM class 2 serial data...
1996 Pontiac Sunfire SE 2.4L MIL Lamp on VIN: 1G2JB12T5T
I have a sunfire that is beating me up.I have a mil on but I can get a responce from the pcm.I can talk to the bcm and the abs moudule's.I have looked at the pcm connectors and they look good.Thanks for looking
1997 Pontiac Firebird Formula 5.7L No Start VIN: 2G2FV22P3V
this pontiac has a mind of its own it will start sometimes and some days it wont. It came to us this way and we diagonsed the problem to the weak fuel pump we drove the car and we felt this car was done. Well the customer drives the car and this is why Iam ask...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Century Special 3.3L Hesitation, Stall VIN: 1G4AG54N8N
Thanks again to all who replied! Second reman computer was the final fix. After changing the VSS and getting a change in the scanner vehicle speed reading(went from erratic to steadly reading twice the speedo) wasn't sure what to do next. Changed computer and ...
1995 Buick Century Custom 3.1L Cooling fans VIN: 1G4AH55M8S
I will call this one fixed. The hidden 10 amp fuse powers eight different things. Both cooling fan relays, Crank sensor, Cam sensor, AC clutch relay and AC clutch to name a few. The AC clutch was drawing to much amperage at times, blowing the fuse. When the ec...
1999 Buick Regal LS 3.8L Stall VIN: 2GWF521XX1
thanks to everyone who replied. the customer took her car and hasn't returned so i'm going to call this done. if she returns i'll repost what i find.
1999 Buick Regal LS 3.8L compressor clutch VIN: 2G4WB52K2X
thanks too all that replied you were of great help . the rodent damage was also on the gray wire that feeds the pressure switch near accumulator, there is also a splice of that wire that goes to the fuel evap pressure sensor that was also stored in the memory,...
1995 Chevrolet Blazer 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GNDT13W6S
Thanks to all who replied your time is much appreciated. I received the following possible solutions. 1 for bad o2, 1 for intake leaking, 2 for plugged cat, 3 for sell the customer a complete compression test, 5 said they thought it might be a broken valve spr... Trouble codes: P1406.
1996 Chevrolet Blazer 4.3L Hesitation, MIL Lamp on VIN: 1GNDT13W7T
thanks to all who had replied!!. i had installed fuel pump and fuel filter and that had solved the problem. truck starts and drives absolutely outstanding.i had never thought that 7 psi below manufacturers recomended specs would cause so much problem.it is ver... Trouble codes: P0300 (random misfire detected).
1996 Chevrolet Lumina 3.1L Surge, Cuts out, Misfire VIN: 2G1WL52M4T
OK thanks for all the replies,Tried water down the intake and top engine cleaner just to make sure it was't carbon,didn't work.Did a compression test and had 0 in #1.Pulled valve cover and #1 intake valve doesn't come all the way up.Dropped a valve guide or se... Trouble codes: P0301, P0300.
2000 Chevrolet K2500 7.4L dome lights,horn VIN: 1GCGK23J6Y
i received 3 thoughtful responses: dimmer dome relay,aftermarket alarm, or wires rubbed/melted together. it turned out that the remote keyless entry (rke) receiver had burned up internally. the dome light and horn are wired through it in order to produce that ...
2000 Chevrolet Tracker 2.0L Poor Idle Quality, loss of power VIN: 2CNBJ13C2Y
thank you for the replies. 1 out of the 3 replies did give me some information to repair the vehicle. i did not get the information that i was looking for. i tried other scanners to obtain the timing procedure (fixed spark mode), they did not have this functio...
2002 Chevrolet Tahoe LS 5.3L Excessive Emissions, Stall, MIL Lamp on VIN: 1GNEK13Z42
Thanks to the 9 techs that replied. Sugestions were plugged air filter,ecm,intake gaskets,fuel pressure regulator, injectors, reflash,map sensor,02 sensors and egr. The fix surprisingly was both cats partialy plugged,the weird thing was I didn't catch any weir... Trouble codes: P0101 (maf sensor performance).
2004 Chevrolet Silverado 3500 6.6L No Start VIN: 1GCJC33184
The injector where the problem . The injectors are under warranty, so the truck went to the dealer. Thanks for all the help.
1993 GMC C2500 Sierra SLE 5.7L Poor Idle Quality, Surge VIN: 1GTGC24K8P
Sorry to say we have not yet repaired this vehicle. The customer has not returned. If we do get the vehicle back we are eager to investigate the suggestions that you offered. Thanks again and when it returns we will post the actual fix.
2000 GMC Jimmy Diamond Edition 4.3L alarm system VIN: 1GKDT13W6Y
Helo all and once again sorry for the late response. One thing I failed to mention is that the vehicle alarm, horn and lights, will sound and flash even with the alarm not set. The vhicle can sit for days unlocked, without anybody touching it and the alarm wil...
2000 GMC Yukon Denali 5.7L fuel gauge vibration VIN: 1GKEK13R8Y
Thanks for all the replys and comments. The customer did not want to go with the recommended repair, replacing the IPC. He decided to put up with the needle vibration for a while longer, as everything else was working okay. If we do the repair at a later date,...
2003 GMC Sierra 1500 SLE 5.3L wipers VIN: 2GTEC19T03
Thanks to all of you who sent me information. Nearly everyone said that I should just replace the wiper module. That was the problem. The module is under a black plastic cover on the wiper motor. I was able to verify the problem by tapping with a rubber mallet...
2000 Oldsmobile Silhouette GLS 3.4L cooling system VIN: 1GHDX03E8Y
Thanks for the help. The problem was head gaskets breached and both heads had cracks between the valves.(my machine shop guy said that is common).My goal in asking was to determine if I still had air in the system after bleeding or was new air being entered vi...
1994 Pontiac Sunbird LE 2.0L Surge, Cuts out, MIL Lamp on VIN: 1G2JB14H6R
This car never returned to the shop. The owner was trying to fix it himself. He is the one who put the egr and stuff on. I explained we would need to spend some time on the vehicle diagnosing but I think he just wanted that quick fix. The four responses I re... Trouble codes: 13 (o2 sensor), 32 (egr error).
1997 Pontiac Grand Am GT 3.1L Int Lps Fuse VIN: 1G2NW12M5V
Techs, Thanks for all your responses and ideas. The problem was with the alternator. I found this as the car died while driving again with the fuse pulled for the 70 miliamp drain. I located a GM TSB 73-64-03 dated 1997-01-01 for revised perositic drain proc...
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