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Prev Professional Automotive Repair Technical Discussions for February 15, 2008
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Escalade 5.7L theft system VIN: 1GYEK13R2X
we have a trade in vehicle that starts and then dies. after replacing the ignition switch actuator the problem still exists. further checking notates the theft system may be disabling the vehicle. we disassembled the column again to make sure we did not leave ...
1989 Chevrolet Cavalier 2.0L Cuts out, Stall, starts,dies VIN: 1G1JC8119K
hey guys, got a wierd one. this chevy consistantly starts/runs/dies until it reaches 70 degreesF. the customer has replaced all sensors, ign module,coils,pcm and any other thing he could. this car has been to a dozen shops with no fix. i have ohmed every wire ...
1990 Chevrolet Lumina 2.5L fuel gauge VIN: 2G1WL54R3L
could not get gauge needle to move/koeo purple wire grounded or not. back probe harness at fuel tank. tested gauge wire. has 9 v. till i plug in the connector then voltage goes to 0.0 V. has about 3 gal fuel in tank. ran out had add some.used car manager wants...
1992 Chevrolet C1500 Cheyenne 7.4L shift solenoid VIN: 1GCDC14NZ1
Customer brought vehicle in stating that the vehicle will not shift from 2 gear. First thing we found a code 81 quad driver failure shift solenoid B. we pin tested all the solenoids from computer connector and found them to be good with 20.8 ohms. found no pow...
1992 Chevrolet Lumina Euro 3.1L Poor Idle Quality VIN: 2G1WN54T9N
Good day to all.Have this lumina thats getting to be areal pain in the !@#$%.Customers complaint is that it runs rough and idles bad.It will idle from 500 rpm to 2500 rpm at any given time.It misses really bad also-Only code i got was an iac code.Let me give y...
2002 Chevrolet Express 3500 5.7L rear wheel speed sensor, abs module VIN: IGAHG39R42
Replaced abs module because of loosing wheel speed sensor intermittently on both the left and right front sensor. Have replace the sensor, adjusted wheel bearings and checked the wiring back to the module. Checked the power and grounds at the ecbm. Put used mo...
2003 Chevrolet S10 4.3L Fuel Gauge VIN: 1GCCT19X93
Fuel gauge not working,low fuel light on replaced the fuelpump/sender unit (new A/C Delco) replaced instrument Panel replace pump /sender again.Has a code P0463 -Fuel sender circuit high!I found a deal on Identifix said I should check voltage on terminals A an...
2005 Chevrolet Silverado 1500 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GCEC14VX5
Well guys I think we screwed this one up. My tech decided to clean the throttle plates, had a helper hold pedal down with key on to open throttle plates, while he was cleaning the plates closed by themselves and got his finger stuck between the plate and t/bod... Trouble codes: P0120 (tp sensor circuit 1), P0220 (tp sensor circuit 2), P1516 (tac module throttle actuator position performance), P2135 (tp 1/2 correlation)
2000 Oldsmobile Alero GX 2.4L Hesitation VIN: 1G3NK52T9Y
this car has had 4 aftermarket cats installed. avging 1 1/2 months between code reappearing(p0420). 2 time there were missfire codes with the cat code. all scan reading seem normal. we have reprogramed the ecm also. any help would be greatly appreciated Trouble codes: P0420 (cat efficantcy), P0300 (random missfire)
2004 Oldsmobile Alero GL 3.4L Theft VIN: 1G3NL52E04
Car came in with a no start. Found that BCM needed to be replaced due to security issues. Simple fix? Got new BCM and installed. Preformed new BCM set up with Tech 2 and noticed no options were givin when setting up. Contuined to theft relearn and car started ...
1999 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5272X
I'v run into a bit of a strange one. I have a Saturn SL2 with and egr 401 low flow code. Egr is new, no other codes. Egr can be controled with the tech2 but the map readings don't seem to change untill the egr reads 50%. The code is tested for during closed th... Trouble codes: P0401

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Electra Park Avenue 3.8L Surge, Cuts out, Misfire VIN: 1G4CW54C4K
Thanks to the many responses i recieved all your help was very appreciated. I finally got the problem to duplicate sitting in shop after i drove the vehicle 15 miles the problem stayed consistent. The crank sensor was replaced prior to bringing it to us and th...
1998 Cadillac DeVille 4.6L mirrors VIN: 1G6KD54YOW
Well Thanks for all the replys I think the old guy has forgotten what he was having trouble with, but when he does finally come back I will post an update.
1992 Chevrolet Corvette 5.7L Hesitation, Cuts out, Stall, Poor Fuel Economy VIN: 1G1YY33P6N
Hey guys thanks for all the replies. Um yes someone overlooked the obvious it was the exhaust. I dropped the exhaust & the vac went to 18" imagine that. That spec I had on the injectors had me wondering I didnt think it sounded right thats why I asked. Thanks ...
1995 Chevrolet Tahoe 5.7L Hesitation, Surge, Stall VIN: 1GNEK18K5S
The EGR was the problem. The diaphram return spring was weak and openning early. Thanks also on the input on OEM vs. aftermarket. Very good replies, had 8 replies within a couple of hours. It's great to know we have the network (kind of like the cingular comme...
2002 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E52
Well I could not get the procedure to work, so I had to send it to the dealer. Just got it back and everything works great. Trouble codes: P1631 (PCM detects incorrect password).
1996 GMC Yukon SLE 5.7L Noise VIN: 1GKEK13R6T
was able to insulate fuel lines were they run next to frame by fuel tank. Vibration noise reduced to acceptable level. When we filled tank, noise totally went away.
1998 GMC Sonoma SL 4.3L clock VIN: 1GTDT14W2W
I think everyone was correct. It was the radio that was bad. We replaced it with a used one and everything is ok. Thanks for everyones help.
1998 GMC Jimmy SL 4.3L Noisy Lifter
As expected by me and others it was indeed one bad lifter. I found it immediately it was collapsed and you could shake it like a baby rattle. 12 new ones and its quiet as a lamb. Thanks everyone cant wait till I get to help others out!!
2001 Oldsmobile Intrigue GX 3.5L Stall VIN: 1G3WH52H61
Replaced Crank Sensor. Test drove about 80 miles. No problems.
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