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Prev Professional Automotive Repair Technical Discussions for January 6, 2006
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G3WS52J01
Hello all this buick was handed to me after failing emission test for state ins. Ran flow chart for code and came up with bad egr valve.Replaced valve with a/c delco same prob. Ecm shows zero comand and sensor sig. shows 12% the learned minimum shows 0.47 and ... Trouble codes: P1404
1987 Cadillac DeVille 4.1L Stall VIN: 1G6CD5189H
When the vehicle is put into reverse and wheel is turned the vehicle dies. The car starts right back up with the starter dragging like something is advancing the timing and then only dies again when you put into reverse and wheel is turned. We have never seen ...
1994 Chevrolet S10 2.2L Flexplate VIN: 1GTCS144XR
This vehicle broke 2 flexplates over a year and a half period prior to us installing a rebuilt engine about 6 months ago. The customer does not drive it much so the mileages may seem a little odd, but after only 500 miles the flexplate broke aroung the cranksh...
1996 Chevrolet K1500 5.7L No Start VIN: 1GCEK14R9T
hi guys, i have 2 chevy trucks in my shop 1 is my personal 97 chevy suburban 2500 with a 7.4l. the other is a k1500 with a 5.7l. i have put new fuel pumps, strianers, and filters on both 10,000-12,000 miles ago. i also put a sending unit on the k1500. it looks...
1996 Chevrolet K2500 Suburban LS 7.4L 4wd VIN: 1GNGK26J7T
Customer states that 4WD hi light blinks when turning corners at highway speed. 4WD operation doesn't seem to be affected. This is a 4WD push buton system.It does not have the 4WD auto button. We got it acting up just like the customer stated. Also we got it a...
1998 Chevrolet S10 2.2L Mechanical VIN: 1GCCS144XW
This truck came in with a top engine noise. It sounds like a lifter or valve train noise. The noise isn't there where when 1st started but get louder as engine warms up. The noise also goes away when the engine is reved. It sounds like air excaping kindof a ch...
2003 Chevrolet Suburban 1500 LT 5.3L Unknown VIN: 1GNFK16Z43
Oil pressure goes down after driving and warmed up. You can continually accelerate engine & oil pressure gauge continues to drop with each acceleration. It will eventually drop to below 0 psi. Removed oil sending unit & check pressure with manual gauge, pressu...
2006 Chevrolet Silverado 1500 LT 6.0L transfer/driveline VIN: 2GCEK13N46
At low speeds, at convertor lock-up, around 1100-1300rpm, there is a growl or resonance under the truck. It almost sounds like a broken baffle in the exhaust, but you can actually feel it in the truck as it happens. My local Chevy dealer has taken several shot...
1993 GMC K1500 Sierra 5.7L Rev/Drive engagement VIN: 1GTEK14K6P
Hi all! I've got a funny one here. Vehicle came in with front tranny seal leak. Found fr bushing spun and crack in pump. Replace pump and convertor. Used pump has some differences including PWM written on it, different casting numbers and crown on outer edge o...
1999 GMC Safari SL 4.3L No Start, Stall VIN: 1GKEL19W8X
This van starts and then dies right away. The injector pulse disappears when the RPMs are just above turning over speed. When holding the key in the turning over position, it'll start up and then go back to turning over when the RPMs raise a few hundred, and i...
1980 Oldsmobile Cutlass 3.8L Accessories VIN: 3R69AAR506
Car arrive with wiper motor problem. The wipers will stay on and work in low and high speed, switch to delay and they remain at low speed. I removed the switch from the dash, unplugged the washer pump, turned the key on, still working. I installed reman wiper ...
2001 Pontiac Sunfire SE 2.2L fuel gauge inop VIN: 1G2JB12441
gas gauge on empty, check gauges light on. this is what is supposed to happen in default mode. customer has already replaced cluster with salvage one. scan data shows fuel level at 70%. looks like bcm in between pcm and cluster. is bcm most likely cause since ... Trouble codes: P0463 (fuel level sesor high / open)

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52JXY
Well guys, I haven't got this one fixed. The customer has been unable to bring the vehicle back to us yet. Most replies were suggesting that my scanner readings were off and I needed to check tank pressure voltage manually.If this is the case and the voltage i... Trouble codes: P446.
2000 Buick Park Avenue 3.8L Electronic VIN: 1G4CW52K7Y
thanks for your help. I did not know the compressor on this vehicle would run at temp. above 38 degrees. I checked coolant level it was ok. ambiant temps was at 44 degrees. Hooked up scan tool checked for codes with no codes present. Checked both heater hoses ...
1992 Chevrolet G20 Sportvan 4.3L MIL Lamp on, weird running VIN: 2GBEG25Z1N
We found the aldl communicatoin line to the computer had too much resistance to ground. We cut the wire at the computer and it ran fine. So we ran a new wire to the computer to the aldl connector. Thanks alot for all the help.
1996 Chevrolet Blazer 4.3L Ride Control VIN: 1GNDT13W8T
We still have not found the problem. We replaced bearings with ACDELCO parts, but the noise is still there (not as bad though). We are still checking different parts.
1997 Chevrolet Tahoe LS 5.7L starter VIN: 1GNEK13RXV
we fixed this vehicle with help from scott fredrickson,problem was a loose ground wire,common to the starter relay and the p/n switch.location was at the main batt. ground at the block.thanks for your help scott,randy [...].
1997 Chevrolet Blazer 4.3L Cuts out, Stall, HARD RESTART-PROLONG VIN: 1GNDT13W3V
sorry took so long to get back but wanted to confirm repair. replaced cranshaft position sensor and problems are gone. have not heard back from customer so we believe to be fixed.Thank you again really apreciate all the help. not sure if ecm was ever a problem...
2002 Chevrolet Trailblazer LS 4.2L dual zone climate control VIN: 1GNDT13S32
sorry about taking so long but the parts were on factory backorder. ended up being a broken temp door for the pass. side was not a lot of fun taking dash apart to replace but she is done, Thank you for all the help Ron
1990 Geo Tracker 1.6L Poor Idle Quality VIN: 2CNBJ18U3L
I went ahead and sold the tracker and bought me a Suzuki Sidekick. Not to smart am I? I want to thank Rick and everyone who replied. To help others, it was not a vacuum leak. I checked for leaks cold, and had none. I think Rick was probley right about the TPS....
1999 Oldsmobile Intrigue GX 3.5L extended crank VIN: 1G3WH52HXX
First thank you to every one that replied. The crank sensor has 2 sensor in it and mine only had a signal on the A cir. and the B cir. was dead. I installed a new sensor and all is right in the world. Thanks again for all the ideas!! Trouble codes: P0335, P0340, P1372.
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