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Prev Professional Automotive Repair Technical Discussions for April 27, 2006
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Open Help Requests for GM
Help Request Answers
2000 Cadillac DeVille 4.6L Brake light switch VIN: 1G6KD54YXY
Driver's information center said electrical system failure. Scanned vehicle for codes. Extracted PO1574 [brake light switch circuit]. Alldata doesn't give much info on this code. Made sure all the brake lights were working. I could replace the brake light swit...
2001 Cadillac DeVille 4.6L Rear Aux HVAC VIN: 1G6KD54Y42
The car owner complained of no A/C cooling in the rear Aux ducts. I found the unit's aux blower mower working fine, along with the duct blend air motor. Agfter watching pid data I found when these controls are commanded by the switches I see no activity in my ...
1997 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15R8V
hi all i have this van with a reoccuring p1441 ran through the flow chart on it and ended up replacing the vacuum switch in front of the purge solinoid, came back with same code checked the system for any charcoal granules in the purge solinoid and lines back ... Trouble codes: P1441 (evap system flow during non purge)
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1949W
vehicle came in with mil light on , no driveability complaints, scanned system & found p1133, o2 sensors reading normal on scanner. front changing rapidly from 100-1000, rear sensor staying lower 65-170 when warm. system is going in closed loop. i can add fuel... Trouble codes: 1133 (insufficent switching sensor 1)
2001 Chevrolet Tahoe 5.3L Rear wiper motor VIN: 1GNEK13T91
Rear wiper motor on this Tahoe moves erratically or not at all, module clicks continuously. Trouble shooting on Mitchell seems fairly easily, check powers, grounds and switch. Wiring diagram looks very basic, testing looks obvious. Trouble tree leads to replac...
1995 Pontiac Grand Prix SE 3.1L engine VIN: 1G2WJ12M9S
After 10 minutes of idle the car will begin to run hot, approx 225-240 the right side rad fan never gets power. Left side will come on with activation of AC. Checked all wires leading to relay box and up to fan plug for damage. Is there someting I am missing t...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Cadillac DeVille 4.9L Excessive Emissions VIN: 1G6CD53B4N
Hello everyone. Thanks for being patient and lending many replies. Many of which pertained to a possible poor catalytic converter and egr passage blockages. The problem lied in one of the two egr pipes that protrude below the throttle plates in the manifold. A...
2000 Cadillac DeVille 4.6L magnasteer system VIN: 1G6KD54Y9Y
Well a new P/S pump fixed this one. I checked the pressure at the pump cold NOT hot and I didn't do it long enough or repeatedly. If I did I would have seen the pressure drop from 1800 psi down to 800 psi(or more). I am guilty of not following exact procedure ...
1996 Chevrolet Monte Carlo Z34 3.4L oil leak VIN: 2G1WX12X7T
Thanks guys for all the help. Turned out the oil pump drive seal was the culprit. The owner wont spend the big bucks to take the head off so I did what Eric [...] said they have done. Eric said to cut the tab off head,being carefull not too mu...
2000 Chevrolet S10 2.2L security,abs,airbag,seatbelt,batt,fuel lites on da VIN: 1GCCS1951Y
Thanks for all the good information from you guys;most agreed that the ignition switch would be the fix and it was. Never can see anything wrong with these thingsand they give off lots of symptoms.
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