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Prev Professional Automotive Repair Technical Discussions for December 5, 2005
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Electrical VIN: 3G5DA03E72
Customer brought vehicle in with complaint of while driving or turning corners, the interior and exterior lights and accessories with flash on and off (like they are loosing their connections), it has happened a few times and I cannot get it to do it again whi...
1995 Chevrolet Blazer 4.3L No Start, MIL Lamp on VIN: 1GNDT13W85
We have a 1995 Blazer 4.3 that came in for not running issues, customer stated that he has already changed the fuel pump relay (claims it would get real hot)and it would work for awhile then quit. We installed a new relay and checked all grounds and the truck ... Trouble codes: P1221 (Fuel Pump Low Volts)
1998 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GCFG15R6W
Van came in with code for fuel tank press sensor volt low. Use tech 2 to check data value a little over 7.5 inh20. sensor has 5.0 volt ref and good ground to it, but will not produce a signal when hooked up. After a lot of testing I realized that I could get a... Trouble codes: P0452 (Fuel tank press sensor low voltage)
1999 Chevrolet Blazer 4.3L head lights VIN: 1GNCS13WXX
was told there 2 relays found 1 in fuse box under hood its good
2000 Chevrolet Silverado 1500 5.3L No drive front wheel VIN: 1GCEK19TXX
Hi All, I need some help with this one. When in four wheel drive there is not any drive from the front wheels. It will shift from 2Hi to 4Hi without any issues but just not any drive from the front wheels. The lights on the push buttons on the dash are working...
2000 Chevrolet Silverado 1500 4.3L security VIN: 1GCEK14W5Y
This vehicle came to us as a no start, security light flashing. It had a code P1631. We replaced the ignition lock cylinder and the PassLock case that surounds it. We cleared the code and after relearning the truck started and we sent it on its way. Two days l...
2001 Chevrolet Metro LSi 1.3L No Start VIN: 2C1MR52291
Hi guys, This little Metro came in on the hook with the customer stating that it stalled with her while driving and wouldn't start. After checking everything we noticed that the injectors weren't operating. They have power to them but apparently they aren't ...
2003 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J13
car came in about 4 months ago with a no start.after checking found bad crank sensor. drove approx 4500 miles and would not start after overnight.check all normal things and we are not getting injector fire but we do have plug fire.we have checked cam and cran...
1993 Geo Prizm LSi 1.6L Knocking VIN: 1Y1SK5362P
This car has a light knock on light accel only. If the knock starts and you accelerate, the knock stops. It acts like a lazy knock sensor, if that is even possible. With the high miles, I'm worried that it may be internal engine noise. I was hoping for some in...
1991 GMC G2500 Vandura 5.7L Hesitation, Cuts out VIN: 2DEG25K9M4
hey guys, we have been working on and off on this van for a couple weeks. initially on start up the van runs like the converter is plugged up, very underpowered, and sometimes backfires. the fuel flow was was way under spec. so we checked the fuel filter (extr...
1996 GMC Jimmy 4.3L 4 wheel high VIN: 1GKDT13W3T
Wife came home during last storm and said 4 wheel drive won't engage. Hit 4 wheel high button and light will flash then flip back to 2 high. Hit 4low and you can hear front axle engage and it does work. Checked codes and pulled code 2-Encoder fault. I do a goo...
2002 Oldsmobile Alero GL 2.2L engine VIN: 1G3NL12F82
cust states vehicle will just stall when coming to a stop. tech checked for codes and found none. charging syst. checks ok. we havehad vehicle for a week now. tech has driven the vehicle home and can't duplicate problem. was pulling out od shop this am and it ...
1992 Pontiac Firebird 3.1L No Start, Flooding VIN: 1G2FS23T0N
Hi guys, We towed this one in after the customer gave up on it. It had stalled on them and wouldn't start. They installed new spark plugs, dist. cap and rotor. What else they tried to do is anyone's guess. We first checked for fuel and spark. Fuel pressure a...
1995 Pontiac Grand Am SE 3.1L all shifts VIN: 1G2NW15M35
Hey guys, thanks in advance for any and all help. I am NOT a trans guy but I've got 20 yrs experience in all other facets of auto repair. This car was in a wreck in the front end. The customer brought it to me with a harsh upshift from 1-2 and no 3rd or 4th af...
1998 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE52M4W

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Century 2.8L forward gears
Thanks for all the input. It seems the majority opinion is that the forward seal are bad and that the transmission should be rebuilt. I adjusted some prices to make this more affordable to my customer and she agreed to have the work done. Transmission is at th...
1995 Chevrolet C3500 5.7L brakes VIN: 1GBHC34KXS
This truck has not been back for repairs! Recieved many replies on possible fixes for this problem.Unfortunatly we're not able to try them yet.Some suggestions are:brake hoses(been replaced),rear brakes no applying evenly,calipers(replaced twice),ABS,worn susp...
2000 Chevrolet Silverado 2500 6.0L transfercase VIN: 1GCGK24U2Y
We found excessive internal wear in the transfercase due to lack of lubrication. Pump had worn a small pin-hole on the case, letting a lot of the fluid out. We fixed the problem by replacing the transfercase with a rebuilt unit. Thanks for all the help guys!
2001 Chevrolet Silverado 2500 6.0L Transfer case VIN: 1GCGK29U41
Well this one is fixed and down the icy roads. I got 6 very good replied from Dave, T.Kevin, Jeff, Phil, Felipe, and Nick all of whom had suggestions that we double checked as far as we could without actually removing the shift motor/encoder before making our ...
2001 Chevrolet Silverado 2500 HD 8.1L Unknown VIN: 1GCHC23G41
I forgot to mention that I had already checked the drivesahft splines, and so I got many replys saying to check this. The correct fix came from Stephentbred. He said the whine and the trans delay are normal and the thump was not and said to service the differe...
2002 Chevrolet C6500 3126CC No Start VIN: 1GBJ6H1C42
I recieved some basic good info. The intake heater is pcm controlled, the 2 small wires one should be 12v the other ground (from a controller). The controller is under the intake and do go bad. I will be getting back to this truck soon. I plugged it in to get ...
2004 Chevrolet Silverado 3500 LT 6.6L brake pedal VIN: 1GCJK39264
Thanks to all that replied to my help request. We decided to install a new hydroboost unit from GM. Customer is currently driving the vehicle and we are waiting to hear back to see if new hydroboost unit has fixed his situation. It has been almost 2 weeks sinc...
1995 Geo Tracker LSi 1.6L Fuel Gauge VIN: 2CNBJ1861S
The replies that we received talked of a problem with the fuel tank sending unit. We would like tha opportunity to remove fuel tank & check sending unit and wiring to sending unit in fuel tank. My customer does not want to spend the money on the vehicle t this...
1993 GMC Jimmy SLE 4.3L No Start, Stall VIN: 1GKDT13W9P
I should have trusted my instinct on this one because you techs who suggested the Ignition Module were right on the money (thanks Laneard [...].). As always the first thing I did was go to Alldata and research what could give me spark and...
1996 Oldsmobile 88 Royale 3.8L No Start VIN: 1G3HN52K5T
Many of you wrote to tell me to check the grounds including: Rusty from Massachusetts, Alfred from Florida, Bill from Arkansas, Art from Illinois, and Jake from Minnesota. This is exactly what I have done. Only time will tell if this car is repaired properly. ...
2000 Oldsmobile Silhouette GLS 3.4L Wipers do not park VIN: 1GHDX03E3Y
Thanks to al the Techs that replied to this post. from the replies I gather that the tab on the bracket actuates the cam when the motor turns in reverse to park. Some stated that they have seen this tab bent down, I suspect from a cam that is binding. The prob...
1998 Pontiac Grand Prix GTP 3.8L 1-2 shift VIN: 1G2WP5219W
Well, the customer has declined the repair on this one. I did find information regarding the wiring harness to the transmission being too short causing the harness to be under stress as the engine torque moves the transmission in the cradle mounts. It seams th...
2000 Pontiac Grand Prix GT 3.8L no power VIN: 1G2WP52K6Y
Sorry All, I have been in touch with the customer and it has never happened again.. No idea what the cause was and with these cold temps we at the shop thought it might happen ... it didn't. Thanks for all your responses. John
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