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Prev Professional Automotive Repair Technical Discussions for July 31, 2007
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L convertor VIN: 1G4CW52K3W
will drive fine until warms up - dies when coming to stops and jerks - only code in computer is PO742 - when we dropped valve body and replaced solenoids we inspected wiring harness and components
2000 Buick Century Custom 3.1L Mechanical
hi all. this buick lost the heater blower motor. pulled it down and noticed a little water around the seal. customer complpained about water on the carper directly under the heater asssembly. i suspect a leaking heater core but a pressure test yeilded no leaka...
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
At approx 4000 rpms, the motor stumbles and looses power considerably. Idles fine. Test drove vehicle with scanner hooked up. Misfired in cyl 1- 14 times, cyl 4- 6 times, and cyl 6- 4 times, on acceleration. Does the vehicle have a rev limiter at 4000 rpms? Cu... Trouble codes: P0300
2001 Cadillac Seville SLS 4.6L No power VIN: 1FAFP33P91
I have recently replaced the rack and pinion on this car. and now I have no power at all. Is there a ground wire I could have missed? I dont remember seeing any.
1974 Chevrolet Corvette 7.4L Start up and shut down
Hey Guys thanks for reading this email. The problem I have with this car is when you start the car there is no power to distributor on the battery wire.When you release the key slightly, the engine will come to life.I have tried a new ignition switch to no ava...
1997 Chevrolet malibu 3.1L fuel guage
the lady bought this car from the lot she drove it home brought it back a couple days later to repair a flat tire and she mentioned nher gas guage wasnt working.I personally in my short 21 years in auto service have never seen what hers is doing. It we...
1997 Chevrolet Blazer 4.3L Air Bag VIN: 1GNDT13WXV
Greetings SIR wizards. This 97 Blazer has code B1042 Loop Energy Reserve Voltage Low. Looked like an easy fix until I started testing. Mitchell says that the DERM charges the Drivers VLR circuit #236, Pin #4 to appx 36 volts and then checks to see if the corre...
1999 Chevrolet K1500 Suburban 5.7L Master cylinder VIN: 3GNFK16RXX
This vehicle does not do any heavy towing (that we know of), no other leaks anywhere else, when M/Cyl is not leaking brakes all work great, this is the second time I have seen this vehicle (others done by previous tech, who moved away), I'm the only "tech" her...
2000 Chevrolet Blazer LS 4.3L trasfer case VIN: 1GNDT13W9Y
blazer came in customer said that while driving shifted from 2h to 4low by itself i pulled it in and have no codes i put it in neutral and 2 hi it shifted like its supposed to the customer said he could not get it out of 4 low and drove it here that way and ov...
2001 Chevrolet Silverado 1500 4.3L MIL Lamp on VIN: 2GCEC19W41
All information found regarding this problem points to bad/leaky plug wires causing EMI. Replaced wires still have issue. Cannot adjust cam retard, but have noticed other 4.3L with same setup have similar cam retard values and no problem. I've heard some guys ... Trouble codes: P0341
2005 Chevrolet Silverado 1500 4.8L engine VIN: 2GCEC19V05
This noise is a squeaking at idle that turns into a ticking at 1500 rpm and above. It sounds like an old chevy with a fuel pump that needed oil. We have checked flywheel for cracks. None found. Sounds loudest right at timing chain cover. We pulled pan and cove...
2000 GMC Jimmy Diamond Edition 4.3L A/C controll VIN: 1GKDT13W7Y
Hello Guys and Gals, This one has me quite puzzeled. The a/c works fine until the vehicle gets wet. If it rains or you go through a car wash etc. Then the auto controll drops out until it dries out. I cant figure out what gets wet. I figure it must be under th...
1992 Oldsmobile Silhouette 3.1L No Start VIN: 1GHDU06D4N
This is my neighbor's car. His wife was driving it on the hwy and it lurched twice and lost power. He had it towed to his house and found it had no spark. I looked at it and told him to get a module, which he did from NAPA. It now has a lot of spark and plenty...
1997 Oldsmobile Aurora 4.0L low oil pressure and car almost overheats
while driving the car the temp of the coolant goes really high to about the 255 marker on the dash board and then the low oil light come on ,and the low oil pressure indicator in the message center says low oil pressure. And the low coolant light come on too. ...
2000 Pontiac Grand Am SE 3.4L security system VIN: 1G2NF12E2Y
We have two client with 2000 Grand Am.They had a dash cluster light flare up when key was turned on,the security light came on after that and would not start.This happened a couple of times in [...] but clients lived with it.It is now happening again in the i...
2000 Pontiac Bonneville SE 3.8L Speedo, Tach, turn signal indicators VIN: 1G2HX54K3Y
Hello all. I have a 2000 pont bonneville, customer states no Tach no speedo no turn signals. Cluster has been replaced. It has a reoccuring code "U1255-class2 dataLink Malfunction" in IPC Current codes. I am testing with a tech2, i can clear codes and it insta...
2001 Pontiac Sunfire GT 2.4L Poor Idle Quality VIN: 3G2JD12T31
Looking for any information on this at the price of gas can't afford fuel while car is idling at 1500 rpm also has poor idle return. tryed new throtle position sensor idle got higher Trouble codes: P0122
2001 Pontiac Grand Prix GT 3.8L Cuts out VIN: 1G2WP52K71
Vehicle ran perfected but about 2-3 minutes; it cuts off like the ignition key turn off. The fuel pressure remained the same when it shuts off. Started right up and the same thing happened again; this is in Park; if the vehicle is in driving mode,then before i...
2002 Pontiac Grand Am SE 3.4L starting VIN: 3GNK0Z9S00
We have a customer with a 2002 Pontiac Grand AM GT with the 3.4L V6 engine. There is under 20K on the vehicle. Comes in on the hook... crank and no start complaint. I get it... it starts right up like new and customer got really upset and dropkicked the car! S...
2000 Saturn SC1 1.9L pcm not engaging a/c clutch
hey please help me with this. i have a 2000 saturn that the pcm is not grounding the gray wire to the a/c relay so that the clutch can engage. The scan tool says no a/c request under engine managment data. however under the body data it says yes on a/c request...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Regal 3.1L No Start VIN: 2G4WB14T3L
Thanks for the help guys-like most of most of you said the problem was a shorted #3 fuel injector.A new OEM fuel injector fixed the vehicle.Thanks for the insight on what we were missing. Mike
2000 Buick Regal GS 3.8L Cuts out, Stall VIN: 2G4WF5512Y
2004 Buick Rendezvous CX 3.4L compressor VIN: 3654FYJ546
sorry for the wait, the rad was plugged ,i could see light through the whole thing but i thought i should psi wash it anyway,holy bugs batman ,i bet i washed a five gal. pail out of this thing ,cools well now ,problem fixed,thanks to all
2001 Cadillac DeVille 4.6L Poor Idle Quality, Surge, Misfire VIN: 1G6KD54Y21
Thank you Gary [...]. Most of the replies indicated that the boot between the throttle body and the intake manifold was most likely faulty. F...
2001 Cadillac Seville SLS 4.6L Steering Column VIN: 1G6KS54Y51
Thanks for all the help. I tied off the steering wheel and did not have any issues.
1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L No Start, MIL Lamp on VIN: 2G1FP22P8P
All replies where for theft system. bulb check was OK, resistence for key was good,wires not broke.Snapon scanner did read passlock enable 'No'. Checked HZ to PCM was O.K. Scanner reads quad driver 1 failure. Doesn't really make sense. What I've read quad 1 do... Trouble codes: 43 (ESC module or sensor failure), 26 (quad driver 1 failure).
1998 Chevrolet Malibu 2.4L Misfire VIN: 1G1ND5ZT8W
Replaced the coil housing again with gm part, and only time will tell, Thanks for all the help
1998 Chevrolet Malibu 3.1L coolant VIN: 1G1ND52M9W
I thank all my fellows who spend time on this car , i am waiting for customer to approve the r/r radiator
2002 Chevrolet Tahoe LS 5.3L bcm VIN: 1GNEG13ZX2
Thanks for the responses. The list that Wade from Colorado sent was very informative and helped me to be sure of the diagnosis. Replacing the BCM cured this one. God Bless.
1992 Geo Metro 1.0L shifter VIN: 2C1MS24609
i have received many replies on "geo sludge" that seems to be an accurate diag. of what i am dealing with. thank you all very much for your replies on this issue. Chris
1990 Oldsmobile Cutlass Calais SL 3.3L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1G3NT14N9L
2000 Oldsmobile Bravada 4.3L Cuts out VIN: 1GHDT13WXY
Thank you all for the help. I ordered another fuel pump, and replaced the relay. Drove the olds home about 25 miles (40 min with traffic) with fuel gague installed. Fuel pressure maintained 55-60 psi approx. So far so good. Thanks again to all. Dan
2001 Pontiac Bonneville SE 3.8L electric windows, door locks, int lights VIN: 1G2HX54K51
car is fixed, had many problems, l/r window regulator was broken causing connector on l/r door module to melt. replaced l/r window motor regulator assembly, connector and module. still did not work. checked splice under drivers seat as several suggested, splic...
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