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Prev Professional Automotive Repair Technical Discussions for December 6, 2007
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L alternator VIN: 1G4GD2211S
computer says the alternator is putting out 24 volts. Even with Alt disconnected. Thank you for your help
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2000 Buick Park Avenue 3.8L low coolant message VIN: 1G4CW52K9Y
Thanks in advance On this Buick the message stays on saying low coolant.I can't find information on how system works.Mitchell states that there is a sensor in radiator.There is no sensor in rad. or coolant bottle.No wires near either to indecate that one ever...
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2003 Cadillac CTS 3.2L No Start VIN: 1G6DM57NX3
Will not start, sets code P0335 every second crank. Installed-crank sensor, computer, ran wires from sensor directly to PCM, inspected tone ring. I get over 2V AC from crank sensor while cranking, only spec I can find is 4-5V AC @ idle. Does have a wave patter... Trouble codes: P0335 (crank sensor)
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1997 Chevrolet Cavalier Z24 2.4L Cl and pressur plate not releasing VIN: 1G1JF12TXV
Hello fellow repair tech, I have a strange one here. The clutch system is creating air in system only when vehicle is running. A shop had put all new cl assem. slave and master cyl. prior to it coming to us and the customer drove a few days had air in system. ...
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2000 Chevrolet Silverado 1500 5.3L Engine VIN: 2GCEC19T9Y
Cold engine start light knock. Its my personal truck i have had for about 2 years. last year winter months not to bad. this year seams to be worser. Oil pressure at 60 PSI on start up. 30 seconds to 1 min. depending on temp. lower temps makes knocking noise lo...
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2001 Chevrolet Blazer LS 4.3L 4x4 control VIN: 1GNDT13W01
Last year at the end of our winter this Blazer came to me stuck in four wheel drive[it does not have the auto 4x4 feature]I whacked the encoder motor and it shifted back to 2wd so I suspected the motor to be the problem.Now its back so I checked codes and foun...
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2002 Chevrolet Silverado 1500 5.3L pinion shaft VIN: 1GCEK19T52
I let my nephew use a bay in the shop to replace a leaky rear axle seal while I went deer hunting. He removed the pinion shaft locking bolt, but didn't realize it was broken off. When I came in from the morning hunt he was pounding the end of the pinion shaft ...
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2004 Chevrolet Silverado 2500 HD 6.0L MIL Lamp on VIN: 1GCHC29U84
This is the second time i have posted for this vehicle for same issue. Fleet vehicle keeps returning with ses light on for p0446. First time replaced vent valve due to clogged with dirt. Vehicle returned with same issue ( valve clogged with dirt) Found tsb for... Trouble codes: P0446 (evap vent performance)
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2005 Chevrolet Classic 2.2L turn signals brake lights VIN: 1G1ND52F55
This one came in for turn signals and brake lamps inop. The fuse was blown for the turn signals. We didn't see anything wrong so we replaced the multifunction switch. Customer said it worked for 1 day then the turn signals went out. When brought back both turn...
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1994 GMC G3500 Vandura 5.7L Stall, Lack of Power VIN: 1GDHG31K7R
This is why I hate being a mechanic... One of our fleet accounts. Had a stall problem. Read codes and replaced MAP and new set of plugs. Replaced fuel filter. Stalls less, but overall might actually run worse. (double checked gap and plug condition) Checked... Trouble codes: 33 (MAP sensor)
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1996 GMC MDSTEELTILTW 5.7L MIL Lamp on VIN: 4KDB4B1R7T
my problem is not with the code or how to diagnose it.my problem is that the pcm c1 blue32 pin connector does not match up with the wiring diagram or the connector pin out.ilooked it up on mitchel,the gm website,and isuzu.i tried 96-2000 gmw4.isuzu w4,chevy pi... Trouble codes: P0160
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2007 GMC Sierra 3500 HD WT 6.6L MIL Lamp on, lack power VIN: 1GTHK33677
Hi i have a 2007(new body) gmc duramax air filter plugged with snow customer was on really snowy highways the unit began to loose power and was only able to do 30 kph towed unit in found air filter plugged with snow . I called the local gm dealer and they are ...
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2000 Oldsmobile Intrigue GL 3.5L Engine VIN: 1GEWH52H1Y
Hello, This one likes to overheat all the time. I put a thermostat and housing but made no difference. fans come on at right time but radiator is not hot. Heater hoses are engine coolant temp but the uppper and lower radator hoses are cold. Any help would be g...
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2001 Oldsmobile Alero GL 2.4L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy VIN: 1G3NL52T71
I have an Olds Alero that I just replaced the engine in about 150 miles ago with another 2.4 from a 2000 Pontiac! It ran perfect until the other night when it rained very heavy and it started to miss very bad with white smoke coming from the exhaust! The trac ... Trouble codes: P0204 (Inj. Circuit Problem Cyl 4), P0304 (Misfire Cyl 4)
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2000 Pontiac Montana 3.4L turn signal indicators VIN: 1GMDX03E1Y
OK!! I need the help of all of you Pontiac wizards out there in IATN land. We have a 2000 Pontiac Montana that has some wierd issues, first sometimes both turn signal indicators come on when you depress the brake pedal. We have not been able to duplicate the p...
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2003 Pontiac Sunfire SE 2.2L Headlamps VIN: 1G2JB52F53
Hi iATN, thanks in advance for the help. Condition is as follows: No DRL operation, no low beam operation, right side high beam works but leaves 1 volt behind and all other headlamps light up dimly. All test done as stated above. Any help would be AWESOME. Tha...
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2005 Pontiac Sunfire 2.2L engine, timing chain
have been doing the regular service on this customers car from new(every oil change at 5,000 km) Customer has requested Synthetic oil for all oil changes from 15,000 km. 80,000 km ago(70,000km) engine started to make a noise (clatter) intermittantly at startup...
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Seville STS 4.6L Poor Idle Quality, MIL Lamp on VIN: 1G6KY5297P
Thanks for all the help . The costomer has not shown up for his appointments so when and if he comes in I will let you know what we found thanks again Trouble codes: P0041.
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1998 Cadillac DeVille 4.6L whistle VIN: 1G6KD54Y7W
20+ REPLIES. ALMOST ALL RIGHT ON THE MONEY. THE BACKFIRE VALVE ON THE PASS END OF THE INTAKE PLENUM IS THE CULPRIT. WITH A LONG SCREWDRIVER I WAS ABLE TO PUSH ON THE VALVE AND THE WHISTLE CEASED. IT SCREWS INTO THE PLENUM BEHIND PS PUMP. NEW VALVE FROM CADDY A...
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2003 Cadillac DeVille DTS 4.6L cooling system VIN: 1G6KF579X3
customer finally returned.checked for dye and confirmed watercrossover.customer declined repair and added bars leak.took care of leak,but i wouldnt say its "fixed".thanks to all who responded.
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1986 Chevrolet El Camino Conquista 5.0L Poor Idle Quality VIN: 3GCCW80H8G
THANKS TO ALL THE TECHS WHO RESPONDED. THE CAR FINALLY CAME BACK IN TODAY. TURNS OUT THE INTAKE GASKETS STARTED LEAKING COOLANT SO WE REPLACED THEM. WHILE DOING THE JOB WE FOUND A FEW OTHER SMALL VACUUM LEAKS FROM VACUUM LINES. ALTHOUGH THE INTAKE GASKETS ...
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1994 GMC Sonoma SL 2.2L rough idle VIN: 1GTCS1447R
Thanks to everyone who offered their advice. I recieved alot of good input. What we found was that even though the compression was good there was alot of leakage past the #1 & #4 exhaust valves. We determined this with a by doing a leak down check with the val...
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