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Prev Professional Automotive Repair Technical Discussions for August 2, 2007
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Open Help Requests for GM
Help Request Answers
1999 Buick Regal LS 3.8L no start at times,air bag light on,abs light on VIN: 2G4WB52K9X
thanks for any input you have. car was towed in customer said it stalled and would not restart. got here and tow truck driver could not start or get car out of park. about one hour later i whent out and it started and could get it out of park.only code is po16...
1997 Cadillac DeVille 4.6L No Start VIN: 166KD5ZY5V
I'm playin clean-up batter on this one. The other tech checked codes, replaced all in related repairs. I reset anti-theft, due to battery being replaced and cleaned grounds and powers. The cranks and runs for 3 seconds and dies and will do the same many times.... Trouble codes: P1626 (Anti-theft system fuel enable circuit), P1599 (CC power management mode or engine stall), P1381 (Cylinder misfire-ABS/PCM signal data), P0603 (PCM keep alive memory error/reset), P0300 (Random misfire)
1999 Cadillac DeVille 4.6L Antenna VIN: 1G6KD54Y6X
GM guys need parts help. We needed to replace the antenna on this Deville updated antenna [...] this bracket fits about 1/2 way up on the ant...
2001 Cadillac Catera 3.0L Abs Module VIN: W06VR54R6Y
Fellow techs need some help on this Catera. Car came in with MIL on scanned ECM Code U2108 Loss of comm with abs/tcs control system. I have had intermitten communication with the abs controller, Now I cant communicate I have tried with the MODIS and Genisys bo...
1991 Chevrolet Astro CL 4.3L Stall, stall after start VIN: 1GNDM19Z2M
Vehicle stalls intermittently, and feels like you just shut it off with a switch. Fuel pressure remains good while this is happening. Restarts right away. After vehicle gets warm, it happens less often.
2001 Chevrolet Suburban 1500 5.3L Unknown VIN: 3GNFK1GT91
Hi All. I have this Suburban that has an intermittent noise coming from the front end. It is a loud whirling sound from the front of the vehicle and also causes a vibration but only lasts for a minute or so and then it is gone. The customer said it happens may...
2003 Chevrolet Venture Value 3.4L Poor Fuel Economy VIN: 1GBDX23E93
Good Morning: I usually don't address fuel mileage when everything seems to be operating okay. However this seems worth at least asking about. Fuel mileage is down around 20mpg. No codes,runs great,serviced properly. There are no codes,none, all the key readi...
2003 Chevrolet Tahoe LT 5.3L No Start VIN: 1GNEK13Z23
Vehicle was towed in for a no start problem. It started as soon as it came off of the tow truck. I am using my low amps probe on the fuel pump and the waveform looks good but the amperage is about 9-9.5. My question is what is the normal amperage on this vehic...
2003 Chevrolet Corvette 50th Anniversary Edition Pace Car 5.7L Radio VIN: 1G1YY22G03
This Corvette has the Bose Speaker & Audio System and Bose Am/FM Stereo with CD player in radio. No CD changer. The Corvette is very clean and original. There is no bass in the audio from the speakers. When rotating the BASS CONTROL on the radio there is no c...
2003 Hummer H2 6.0L MIL Lamp on VIN: 5GRGN23U53
I have this hummer in for P0455. Did an evap smoke test no leaks found it had an EVAP leak code in it, we replaced the Vent Solenoid,Purge Solenoid,and Fuel Pressure Tank Sensor BUT now we cant get evap monitor run All others monitors are ready Cat,heater,O2 W... Trouble codes: P0455 (Evap large leak detected)
1998 Oldsmobile Intrigue 3.8L security lite VIN: 1G3WH52K6W
I replaced the water pump on this olds,now it will not run. It did before I put the pump on. It has a code p1626 (theft deterrent start enable signal lost)I have checked all power and grounds on pcm and bcm all ok. Check pass lock resistor,check all fuses ok. ...
2000 Pontiac Grand Prix GT 3.8L Blower Motor VIN: 1G2WP52K8Y
Heater/Air Cond. fan (blower) motor will run, than if you turn the speed down i.e. from high to low or med it will stop, also if its running heat or a/c mode, dosnt matter have it running on high speed turn the ignition off and than on again fan will not resta...
2001 Pontiac Grand Am GT 3.4L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G2NV52E71
Calling all Pontiac techs. Car came in a month ago for a crank no start. Tessted for injector pulse and had none. Found passlock sensor bad as well as ignition switch. Replaced both did the 10 min. relearn and all was well. Now car is back as a crank no start ... Trouble codes: P0101, P0300, P0463, P1106

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Park Avenue 3.8L anti theft VIN: 1G4CW52K5V
Thanks to the many people who took time to reply. Unfortunately I cannot confirm what fixed the vehicle, but we did two things and the car has not acted up since. The first was tell the customer to use only one set of keys all the time. Previously she used ...
1993 Cadillac Seville STS 4.6L power steering pump VIN: 1G6KY529XP
Juan from california hit it on the head. was another bad acdelco part. replaced with a a1 cardone part and all is well. cant believe i had two bad pumps. but i believe it now. Thanks to all 12 responses i received all had good ideas and different ways of think...
1994 Cadillac DeVille 4.9L Surge, Misfire, Poor Fuel Economy VIN: 1G6KD52B8R
Thanks guys,I received 14 responses to this concern. Many of you think the same. suggesting EGR issues, Distributor cap issues, proccesor issues, etc. We went back tothe basics rechecking everything. Concern still exists, wesent the vehicle for advanced help. ...
1984 Chevrolet Corvette 5.7L Misfire VIN: 1C1AY0786E
Almost every one of the replies said to check for a flat cam. We had already checked for an internal vacuum leak and the EGR had been eliminated as a problem with a block off plate. We pulled the valve covers off and the cam looked fine on all the cylinders. N...
1992 Chevrolet C1500 Cheyenne 5.7L cylinder heads
thanks to all who confirmed my instinct that it would be ok except to the individual that stated buy a new torque wrench this would not normally have been a problem but I had loaned mine out being the nice guy that I am.
2001 Chevrolet Malibu 3.1L theft VIN: 1G1ND52J61
Thanks for all replies, this is a fleet vehical and I am still waiting on them to pull the driver for a day.
2003 Chevrolet Impala 3.4L blower motor VIN: 2G1WF52E93
Thanks everyone for your help on this one. It was the ignition switch that was shorted. Jaime
1999 GMC K3500 Sierra SLE 6.5L Surge, Cuts out, Stall VIN: 1GTHK39F9X
Well the PMD/FSD was definately the problem, replaced it and added the relocating kit and then drove her for about 3 hrs with no issues what so ever. What I did learn through this is that the closure time is controlled by the PMD and the readings I was gettin... Trouble codes: P1216 (Solenoid closure time too short).
1996 Oldsmobile Achieva SL 2.4L security VIN: 1G3NL52TXT
Thanks for the help, they have now driven it a couple weeks and it has been perfect. We sent the instrument cluster out for rebuilding and that took care of it.
2001 Oldsmobile Aurora 3.5L compressor VIN: 1G3GR64H81
Thanks for all the help, I really do not know if the vehicle is fixed or not, the customer has not called back, after cleaning and tightening the conncetions on the back of the control head, which were loose all appeared the be working ok. I also added some st...
1995 Pontiac Trans Sport 3.8L Hesitation, Surge, Cuts out, Stall VIN: 1G34G5778U
ok thanks everyone who replyed,it was the red wire comeing from mass air sensor to harness junktion plug on passenger side it was broke on inside wire. but out of side wire looked fine.tested plug moveing wire harness and watched dmm and volts fell agia... Trouble codes: P0101, P0406.
2000 Pontiac Grand Am SE 3.4L security system VIN: 1G2NF12E2Y
Both vehicles were repaired with new ignitions and a relearn.Thank-you for the replies.Sean
2002 Pontiac Grand Prix SE 3.1L ignition cylinder VIN: 1G2WK52J92
thanks to all that gave help this ended up being the ignition switch replaced with new one all is good not very nice to swap though thanks again dave
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