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Prev Professional Automotive Repair Technical Discussions for May 19, 2004
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Open Help Requests for GM
Help Request Answers
1985 Buick Electra Park Avenue 3.8L front crank seal VIN: 1G4CW6936F
hey everybody i am looking for the retainer that holds the packing in the front cover that is the front seal. my local gm dealer doesn't stock it and says it back ordered all over the U.S.,and there are not any dealers near that stock it either. all the part ...
1988 Cadillac DeVille 4.5L master /accum. combo VIN: 1G6CD515XJ
Red brake light is on and car has no power assist.you can hear the pump hum when the keys is turned on. but system dosnt build pressure.
1994 Cadillac DeVille Concours 4.6L alternator VIN: 1G6KF52Y6R
Car returned today charge light on again only charging about 7 volts, amps were about 97 amps. Replaced alternator with another reman. max volts is 11.25, amp are at about 115 when loaded down. checked for 12 volts at back of alternator, present. Disconnected ...
1998 Cadillac DeVille 4.6L abs light traction control light VIN: 1G6KD54YXW
vehicle will activate traction control upon driving from a dead start for no apparent reason then after a few miles abs light activates and stays on until next startup has codes pc1527 and c1226 my code chart and mitchell does not list these codes any help app...
1987 Chevrolet V20 Scottsdale 5.7L Stall VIN: 1GTGV24K2H
Hi Guys, Here goes. We have this 87 chevy truck that came in on a hook about 2 weeks agao. It cranked fine but had no spark. Traced the problem to a bad ICM. Removed the Distributor cap to replace the ICM and found it full of oil so we installed a reman distri...
1989 Chevrolet V1500 Suburban Scottsdale 5.7L Poor Idle Quality, Hesitation, Misfire VIN: 1GNEV16K9L
vehicle came to us for rough run condition that worsened when it got warm.has new ignition components and checked for correct installation.every thing checks outs good.compression is min 125psi across the board.pulled wires one at a time to check for rpm chang...
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 2GCEK19R7T
Greetings, fellow techs, my bald head can't stand another second of this twister, hopefully someone has a cure for this one. The eng cranks- no spark, this is an enhanced ignition system. A coil driver takes a command from the VCM, vehicle control module, on c...
1999 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1WD52M3X
P0336 came bake found .6 volts on 24X circuit A @pin 70 on PCM. Ground is good. Tach is in-op and when I back feed circuit A with battery voltage Tach works fine and idle smooths out. I can't find what circuit feeds the 12volts. Trouble codes: P0336 (CKP sensor circuit A 24X)
2001 Chevrolet Prizm 1.8L daytime running lights VIN: 1Y1SK52831
Good Morning, Thanks for taking the time to read this post. Your help is deeply appreciated. The original complaint was that the parking lights would not turn off. Performed circuit tests and determined DRL module was keeping them turned on. Installed new DR...
2002 Chevrolet Express 3500 5.7L Stall VIN: 1GBHG31R11
We have this '02 Chevy G3500 Micro Bird bus. Once in a while it will stall when coming to a stop. When it does it will restart but will stall when you let up on accel. pedal. Since we could never get it to act up i replaced the iac and egr a couple weeks ago. ...
1997 GMC K3500 Sierra SL 7.4L MIL Lamp on VIN: 1GDJK34JSV
Hello All This 97 GMC 3500 pu was brought to us from a customer who replaced his intake gasket and now needs his timing set. Well the cam degrees read -45 even after pulling the distributor to repositioning it 4 times still -45. What is the best way to set th...
1991 Oldsmobile Cutlass Supreme 3.1L Cuts out, Stall, MIL Lamp on VIN: 1G3W754T6M
Check engine light comes on intermittently with code 42 (EST circuit) being set. The customer reports that the vehicle dies intermittently while driving, but I have not been able to verify this. The ignition module failed the EST ohms test as per the flow char... Trouble codes: 42 (Electronic spark timing problem)
1991 Pontiac Sunbird LE 3.1L speedomotor VIN: 1G2JB11T8M
speedo only works when the car has been running for 15 mins.checked for pulse at the sensor and have a signal but not sure if the magnet inside the sensor is gone. Dealer want $300 for the sensor and and I'm not sure if it could be a tranny internal problem. P...
1999 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire VIN: 1G2NE52T5X
This car came after someone put a waterpump on in the back yard. It would hardly run. After messing with awhile I found they had the timing chian off a few teeth on the exhust cam. and the tesioner was not released. Have no idea why they went in there. Retimed...
2000 Pontiac Grand Prix SE 3.8L p0716 VIN: 1G2WJ52K4Y
Hello everyone and thanks in advance for the help on this one. The problem is an intermittent service engine soon light with a P0716 (input shaft speed sensor error). I removed the side cover and replaced the sensor thinking it would go open intermittently. T...
2002 Pontiac Grand Prix GT 3.8L traction control VIN: 1G2WP52K12
When this vehicle is first started and you move it forward a few feet you can feel the Abs pump cycling (just buzzing). After this the symptom does not occur again unless the car is switched off and then restarted then you can make it cycle again. This symptom...
1997 Saturn SC1 1.9L MIL Lamp on
after ETC sensor and wiring repair, rear O2 code returns (p0140). Replaced rear O2 sensor, and inspected wiring for damage. Scanner does show voltage movement in shop, after 1-2 days driving, the MIL on again. Believe we just have a bad cat, but other FIX post... Trouble codes: P0140 (No activity bank 1 sensor 2)
2003 Saturn VUE 2.2L MIL Lamp on VIN: 5GZCZ23DX3
This car came back to us two days after we put an ignition switch in it to try and solve the problems discribed below. The symptoms are TACK DROPS TO ZERO WHILE THE CAR IS RUNNING and you LOSE POWER STEERING and the POWER LOCKS GO NUTS. Also the SECURITY LIGHT...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L cruise control VIN: 1G4HP52LOR
Recieved 4 replies on this car;one suggesting possible vac.dropout during cruise operation and 3 suggesting brake switch problems.we had pretty well eliminated vac problems already but the brake switch problem sounded possible.seems that the scan tool won't al...
1987 Chevrolet R10 Custom Deluxe 5.0L No Start VIN: 1GCDR14H9H
many of you suggested replacing the ignition module,i had neglected to tell everyone i had try one (mostly out of fear of being tagged a parts changer)bill from illinois was a great help!!he suggested disconnecting the four wire connector at the dist and with ...
1989 Chevrolet S10 4.3L Poor Idle Quality VIN: 1GCCS14Z8K
Thanks for the suggestions on how to fix this truck. Most suggested that I had a vacuum or timing problem. I smoke checked the truck and didnt find any leaks. I rechecked the timing and found that it was VERY advanced (maybe 20 degrees) from what it showed the...
1994 Chevrolet C1500 Suburban Silverado 5.7L Stall VIN: 1GNEC16K3R
What Was found was the coolant temp sensor was the problem. We replaced it and the problem was gone. I just wanted to say thanks to all the people thet took time out of there busy [...] and help me with this problem thanks. Some times you get so involved in your...
1999 Chevrolet Silverado 1500 4.8L fuel gauge and sender VIN: 2GCEC19V5X
First of all I would like to thanks all responders for your efforts. I have not been able to repair at this time as customer is very busy, (electrical contractor) and has not brought it back to us. Listed below are the responses I received and were helpful. Th...
2003 Chevrolet EXPRESS 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBJG31083
The fix for this vehicle was wiring from pcm rubbed through , just above frame where bracket is welded to frame for upper control arm. After repairing these wires bias voltage with key on engine off was .450mv like it should be. We also needed to replace #6 in... Trouble codes: P0300.
1999 GMC Yukon Denali 5.7L Vortec unit leaking VIN: 1GKEK13R6X
The consensus was that we should replace the unit with an updated model. www.linder.com or 1-[...] is the place that was recommended to get the updated model. Trying to replace only one of the leaking poppets and then have it come back later did not see...
1991 Pontiac Sunbird LE 3.1L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G2JB11T8M
thanks everyone for the info EGR was stuck open pintle#2 and the wires were replace based on age idles fine and dosent stall when braking on decel. turn signals was the area that got me thinking harder than I really had to. You guys and girls are great fri...
1994 Pontiac Trans Sport 3.8L Poor Idle Quality VIN: 1GMDU06LOS
well i had the van running in the shop engine died and would not restart. tested for spark and had spark only on one coil. replaced ignition module all was well and the mysterious idle problem was gone thanks to all that responded.
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