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Prev Professional Automotive Repair Technical Discussions for May 20, 2006
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1992 Buick LeSabre Limited 3.8L Misfire VIN: 1G4HR53L3N
Hi Techs, I'm hoping for some help with this Buick...It has a missfire at idle on #2 & #4 cyl... The compression is good, a cylinder leakdown test is good...I removed the valve covers to check the valve springs and rockers..OK...I though I had a vacuum leak a...
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1994 Chevrolet Astro 4.3L engine VIN: 1GBDM15Z0R
pulled car in bay ,bad miss. preformed engine swap,now runs to rich, won't hold idle runs better with only one injector unpluged in throttle body, backfires like out of time but is not
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1996 Chevrolet Monte Carlo Z34 3.4L timing belt VIN: 2G1WX12XXT
this car had a timing belt and complete pulley set installed at another shop, it came to us 2 months later with the timing belt walking outward toward the cover and half chewed up. we inspected all the idler pulleys and they're all new (dayco)and the thrust be...
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1996 Chevrolet Blazer 4.3L No Start, Cuts out, Stall VIN: 1GNDT13W4T
ok ,we,ve just about given up on this thing ... client says it will stall intermittently and will not restart for an hour or so (sometimes less), but has never done it to us . We've had it running for hours and hours .Fuel pressure and volume good ,ign. module...
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1983 GMC Suburban K1500 5.7L Waterpump/crank
This is a Family vehicle and of course it's in the driveway at my Dad's house and not the shop. You all know the story. Here's the problem: The water pump pulley and the crank pulley are out of alignment with each other by about 1/4" or half of a v-belt groov...
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1992 Oldsmobile 88 Royale 3.8L Surge, MIL Lamp on, Spark Knock VIN: 1G3HN53L7N
This car runs well until the lockup converter engages in 4th gear and you will feel a steady jerk on light throttle. If you lift off the throttle or give it more throttle it runs great again. I also noticed the engine knocks badly for a moment then surges, the... Trouble codes: 21 (TPS low voltage), 22 (TPS high voltage)
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1995 Oldsmobile Cutlass Ciera 3.1L temp gauge VIN: 1G3AJ55M2S
vehicle came in possible overheating ,tenpgauge goes into hot zone ,temp lite comes on breifly . replaced thermastat and temp sensor as cooling fan did not responed to temp gauge on dash . found gauge & scanner readings are quite different, replaced temp sendi...
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Fixes & Summaries for GM
Fix/Summary Answers
1984 Buick Regal T-Type 3.8L engine VIN: 1G4AK4790E
I had hell of feedback on this one. I have so much time and money in this one, I am not willing to go any further. I am going to eat my life savings that I have into this one and carry on. I did however decide (by consensus) that this was definitely detonation...
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1998 Chevrolet Blazer 4.3L Blend door VIN: 1GNDT13W9W
Well I would never guess this, The first replacement actuator would not move, (it was in a box that had been opened)The second actuator only moved a 1/4 of a turn or so, still the original actuator would occlitate but would work, finally the third actuator did...
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2001 Chevrolet Blazer LS 4.3L Hesitation, Engine Speed Hangs VIN: 1GNCT18W11
Hello, And thank you to every man who wrote to offer their suggestions. Thank You. This help request actually was for a shop that is a couple of blocks down the street. They had installed the engine and had trouble after releasing the vehicle. They also ha...
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2003 Chevrolet Tahoe LT 5.3L compressor VIN: 1GNEC13Z03
Marshall hit this one on the head...with ATC the snowflake symbol has to be off for the compressor to be on. I have an 06 Tahoe without ATC and it works just the opposite, you have to turn on the the snowflake to make it work. A little reading in the manual sh...
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1996 Pontiac Grand Am SE 2.4L No Start, Stall, MIL Lamp on VIN: 1G2NE12T7T
Thanks to all who supplied information on this vehicle. Most suspected the pass lock cylinder. Some said the ICM. We tried the pass lock cylinder first. That didn't do it. We finally sent the ICM off to be repaired and all if fixed now. We didn't just throw pa... Trouble codes: P1601, P1629.
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2004 Pontiac Grand Prix GT1 3.8L 1-2 shift solinoid VIN: 2G2WP54264
Thanks to all who replied. The 1-2 shift solenoid was cracked/loose in the valve body. The first one I got from GM didnt click when I comanded it with the modis so I rechecked and had power but no computer controled ground. The computer was just scrambled afte...
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