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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 9, 2004
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1992 Buick Skylark Custom 3.3L High Idle VIN: 1G4NJ51N0N
First things first I would like to thank you all again for taking the time to read this post. I have an high idle (2000-3000 rpm) in park or neutral. Put in gear drops to 1125. Along with a very erratic tachometer...bounces all over the place. Installed sca...
1992 Buick Park Avenue 3.8L anti-theft VIN: 1G4CW53L6N
Hello everyone, This car came in with an intermittion no crank, it did act up long enough to find that the decoder was not gounding the interrupter relay. Ground the relay and the car cranks. I had the bright ideal of removing the harness from the relay and j...
1997 Buick Park Avenue 3.8L radio VIN: 1G4CW52K9V
at times this radio will not come on at all,and some days it will work fine.i replaced the radio,does the same way.we dont have body data in the scan tool so i cant see any info on the radio.any help appreciated.
1998 Buick LeSabre Custom 3.8L No Start, dumping fuel VIN: 1G4HP52K8W
Car came in shop with worn and gas fouled plugs , pluged fuel filter and air filter.good ignition and injector pulse. TPS AT .45 , MAP AT 2.0 V , LONG TERM FUEL - 0.8% SHORT TERM FUEL 0.0% . Injectors dumping fuel on new plugs ,
1976 Cadillac Eldorado 8.2L Poor Idle Quality, Hesitation VIN: 6L67560224
hello fellow techs. i,m looking for a cadillac guru who can help me with this old but excellant eldo. it has a hesitation on accel and an intermittant rough idle. it has 3997 original miles and the customer has moved to mi. from tx. he has had multiple trips t...
1987 Cadillac Cimarron 2.8L Misfire VIN: 1G6JG51W2H
this is a neighbors car(yes i know it's really a chevy)that failed state inspection for emmissions.Testing reveiled one cylinder not firing.Fuel pressure ,injector pulse and compression are all O.K.but there doesn't appear to be any spark fron one side of one ...
1996 Cadillac Seville STS 4.6L drivers door lock VIN: 1G6KY529XT
Based on the info I have already given I believe part of my problem is the fact that the gray wire at the actuator or the relay is not changing state when unlocking the drivers door However I still have the fact that all the other locks or working but working ...
2000 Cadillac DeVille DTS 4.6L engine block VIN: 1G6KF5799Y
Engine came in with an overheating problem found a ruptured hose and replaced found rear cylinder head gasket was also leaking. Removed heads sent out to check for cracks, when reinstalling heads both front and rear heads, head bolts will not tighten up they j...
1982 Chevrolet Corvette 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G1AY8781C
1994 Chevrolet Caprice Classic 5.7L A/C compressor VIN: 1G1BL52POR
The replacement ECM fixed the driveability problem but now the the ECM will not command the A/C clutch on. I can get the A/C clutch on with the tech 2 it also has a code 71. This is a 49 state car ECM #1607151 the replacement is #[...] is this the right num...
1997 Chevrolet Malibu 3.1L high idle speed VIN: 1G1ND52M9V
This car will randomly idle fast,varies from 1300-2000 rpm,I can always get it to go back to normal by restarting 1-3 times then it will work fine until it is restarted.When it is idling fast the desired idle (as read on scanner)is correct,the idle speed indic...
2001 Chevrolet Tracker 2.0L No Start VIN: 2CNBJ13C21
Vehicle towed in with damaged engine (intake camshaft sprocket stripped and timing chain damaged). Installed used engine but vehicle will not start. Hooked up snap-on scanner and all I got was a no communication message. Went about troubleshooting and discover...
2002 Chevrolet Trailblazer LS 4.2L fan clutch VIN: 1GNDS13S22
any testing information on po495 is requested
2003 Chevrolet Silverado 2500 HD 6.6L Hesitation, Cuts out, Stall, CHUGGLE VIN: 1GBHC241X3
Need help. I currently work for a utility company and we have an unusual problem that 2 Chv trk dealers can't seem to find.As you can see by the diagnostic info that there is a serious problem. the first dealer agreed there is a problem but they can't figure i...
2004 Chevrolet ASTRO 4.3L Drive line VIN: 1GNDM19X64
This is my just purchased personal vehicle. I am a disabled wrench twister that enjoys reading this forum daily. We use this van to haul my mobility scooter. The van has a noise in the back of the cabin when the engine leans into the throttle or when a bump is...
1986 GMC P3500 Value Van 6.2L flexplate VIN: 1GTHP32J0G
Flexplate was ripped in two. Center still bolted firmly to the crank, outer part still bolted firmly to the torque converter. No driveability, shifting or starter complaints until the !@#$%^& flexplate breaks. Engine and trans mounts good. U joints good. No br...
2001 GMC Sierra 2500 SL 6.0L abs VIN: 1GTFC29U0Y
Need some better direction here guys please. Customer comes in with ABS light on, found that the power wire at the pump motor had rotted off underneath the insulation right at the motor. Repaired that/pump functional and now light is off however when slowing t...
1995 Oldsmobile Aurora 4.0L raw fuel in exhaust VIN: 1G3GR62C4S
Thanks for taking the time to look at this, Here is the problem. The vehicle came in with the complaint of white smoke out tail pipe, runs rough, smells bad. Problem first occured the day before while sitting in traffic for fifteen minutes or so, temp. gauge w... Trouble codes: 119 (injector open or short)
1998 Oldsmobile Silhouette GL 3.4L Hesitation, Surge, Misfire VIN: 1GHDX03EIW
customer bought van with 205,000km on it 3.4 liter after haveing it for 1-2 days it had a hesitation-stumble-jerking sensation on ligh creus on highway and light 25%grade throttle ,pressure..hooked up to it with genises and had no current codes but did have hi...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Park Avenue 3.8L pwm solenoid VIN: 1G4CW53L1M
We think the pwm solenoid is the problem, as do most of the opinions we've received; however, the customer has not yet left us the car for a long enough period to allow us to work on it; so, that's where we are. If we do get it back, and fix it, we will post a...
1995 Buick LeSabre Limited 3.8L 1st gear VIN: 1G4HR52L5S
Thanks for the replies, everyone said the low roller one way clutch was bad. I knew that wasn't the problem, and I started thinking forward band. I pulled the pan and the servo was working fine and applying correctly but the band wasn't responding. I found the...
1992 Chevrolet Caprice 5.0L Cuts out, Stall VIN: 1G1BL53E0N
Hi Guys !! Thanks for all of your Help. I recieved 20 Replies and a bunch of great Tips. Most of you were on the money. Special Thanks to Stan [...] for taking the time to send me a very detailed tip. on the cracked or weak magnet on the distributor shaft. tha...
1995 Chevrolet Blazer 4.3L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GNCT18W8S
Excellent job Gentelmen!!! Thanks you for all the responces! I really appreciate the quick responses and will soon return the favor. Found one. iATN Tech's ROCK!!! Trouble codes: 32 (egr).
1998 Chevrolet Tahoe LS 5.7L overdrive VIN: 1GNEK13R2W
This is an unusual repair, noticed that Tahoe would also buck and surge in 3rd gear at times only under deceleration. Scanner would not show any problems in misfires, and I could make it shift perfectly with scanner. After closer examination of engine it seeme...
2000 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y15K5284Y
Special thanks to Joe [...]. All ten of you had awesome information on how to diagnose this system. Manually closed the va... Trouble codes: P0440.
2003 Chevrolet Trailblazer LTZ 4.2L MIL Lamp on VIN: 1GNDS13S13
Thanks for help from Mike [...] who said check the grounds under dash and at battery ends. I drove the car home last night and took it for a good test drive.I noticed that the volt ... Trouble codes: U1064 (PCM loss of communication with BCM).
2001 Oldsmobile Aurora 3.5L Poor Idle Quality, Misfire, Fuel gage E to F VIN: 1G3GR62H51
After a long hard battle I just added my own #2 cyl driver for the IC. The one in the loom tested OK both in Ohms and Volts on the modis. But it was still dropping out. Ran my own wire and tagged it in and no more miss. The fuel sender was bad and the old comp... Trouble codes: P1366, P0300.
1995 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K5S
Customer left car for two weeks, for me to use. I could not duplicate the problem. I did repair the ground wire under the ign module (had a little corosion). Removed ignition module and cleaned off back side and the mounting bracket, applied dialectric grease.... Trouble codes: 321 (no 18x ign pulses).
1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52TXT
Thanks to the 3 replies that I had recieved. 1 regarding the grounds, all were checked and cleaned, ending in the same results, no start. 1 regarding the pass lock system. 3 times I could leave the koeo position, for 10 minutes, and the car would start. The la... Trouble codes: 0122 (tps circuit).
2003 Saturn VUE 2.2L MIL Lamp on VIN: 5GZCZ23DX3
Well the Vue is fixed. Most of the guys figured that it needed a BCM and that is what took care of the problem. It is located behind the center of the dash and you have to take out the Shifter housing/Radio bezel first. Be Careful of the wiring to the switches...
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