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Prev Professional Automotive Repair Technical Discussions for November 17, 2006
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Open Help Requests for GM
Help Request Answers
1999 Buick Regal LS 3.8L Hesitation, Surge, Cuts out, Stall VIN: K5X1577536
After the car has been running awhile and is warm, under a WOT snap it stumbles, hessitates, and a sort of ping backfire noise. If you just ease into the throttle it goes just fine all the way to the rev limiter. costumer complains of hestiation going up a hil...
1995 Chevrolet Lumina APV 3.8L alternator VIN: 1GNDU06LOS
The alternator seams to kick in and out. The customer replaced his own battery because it keeps going dead. He thought he would do his own diagnostics. When that did not work he brought it to me. I put a tester on the battery and saw that the alternator was no...
1997 Chevrolet Blazer 4.3L Cuts out, Stall VIN: 1GKDT12WXV
This vehicle has a intermitant stall, radio cuts out and lights dim. customer states that it happens when hitting a bump or applying the brakes but I have not been able to duplicate this. Also intermitantly when you turn on the head lights the engine stalls. T...
1998 Chevrolet K3500 Cheyenne 7.4L Oil consumption VIN: 1GCHK33J2W
Just a question to see if anyone has any suggestions or thoughts on excessive oil consumption. Customer states that before heads were done they burned a quart of oil every 1000 miles. When engine was apart all looked good. no scratches on cylinder walls and no...
1998 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W8W
Good day team, friend, ex-mechanic did a water pump and intake gasket on his van at my shop, van now won't start.He retraced all his steps for connections, pinched wires, etc. all looks good. I have scanned system, no codes, I have cranking RPM, but on the sca...
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 1GCEK19R7W
I inherited from a dealership,and several shops.When it came in it would set P.O.341 cam code which is no sync with crank,but retard was zero.There was no injector pull downs on number 2 and 7 injectors with a new E.C.M. some one else installed from Carquest a... Trouble codes: P.0.3, P.0.3
2001 Chevrolet Tahoe 5.3L engine VIN: 1GNEK13T61
The owner of this Tahoe has a strange problem. If the vehicle sits for at least 3 days when it is started a loud noise comes from the engine which the owner describes as a "thud". It only does it once. If you shut off the engine and restart the noise will not ...
2001 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13C11
hey guys, i need some help.tracker came in for insp with mil on. in pa, that fails.during the normal testing,noticed rusty water in evap vent solenoid.replaced with oe and threw a new oe gas cap at it for good measure considering the mileage.i have a mt 2500 a... Trouble codes: P0440
2001 Chevrolet Venture LS 3.4L power sliding door VIN: 1GNDXO3E91
Car came in for brake job. Did job and left. Customer calls back and says that since the brake job earlier, the Power sliding doors (PSD) don't work. Read checked fuses, ok. Performed reinitialization procedure in AllData. By pulling radio fuse for 30 seconds,...
2001 Chevrolet Monte Carlo LS 3.4L cooling fans
Hey all just want to thank everyone in advance,and im sorry this is a long post. I have this 2001 Monte Carlo that came in with the check engine light on, (code P0480) I pulled up the flow chart on AllData. I did the first step on the flow chart which was to ...
2002 Chevrolet Express 2500 5.0L Mechanical VIN: 1GCFG25M22
Van came in with a noise w/running. Sounded like bad pulley. Removed serp belt and still had noise. Replaced harmonic balancer because it seem to have a little wobble. Still has same noise. Sounds like coming from front lower of engine . Can a crank sensor mak...
1997 GMC Savana 3500 6.5L Poor Idle Quality, Hesitation VIN: 1GTHG39F9V
It was running fine untill I filled it up with shell fuel this morning. It started up fine and drove good for about a half hour and parked it. I started it up about an hour later it started fine but there seems to be no power the pedal to the metal and still n...
2001 GMC Sierra 2500 HD SL 6.6L p0741 tcc solenoid stuck off VIN: 1GTHK23171
hello guys can somebody please help me with this problem. engine light on and scaned.dtc p0741 tcc solenoid stuck off. removed the tranny pan and tested tcc solenoid and all circuits.votage and ohme tested good.replace tcc solenoid with new.flushed tranny and ...
2003 GMC Envoy XL SLE 4.2L motor VIN: 1GKES16573
there is a vibration and noise mostly in rev. but also in drive at around 800 to 1000 rpms she took it to the dealer and they blew her off some times if u press on the exhaust the noise will go away some times it will not also if u press up on the trans tailsh...
2003 GMC Yukon XL 1500 SLT 5.3L Bose Amp VIN: 3GKFK16Z93
Hi Guys, We had to pull the heater box on this Yukon to replace a broken blend door. When we got it all back together and hooked up the battery,Viola! no sound coming from the radio. It seems to be functioning.I think possibly the Bose amp needs a reflash or s...
1990 Oldsmobile Cutlass Calais S 2.5L Hesitation VIN: 1G3NF54U3L
hey i been at cruise w/o a problem . but i need help on this one this engine is backfiring on the throttle after accel.hard only when i do dunk the pedal hard,if open slowly it respont ok, and sometimes had hessited or when i tried to open the throttle suddent...
1996 Pontiac Sunfire GT 2.4L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G2JD12T6T
Argh! This vehicle has been driving me nuts for the last couple of days. The problem is it only acts up very intermitantly with NO CODES... What happens is after the engine warms up to operating temperature it will begin to stall/cut out down to 300rpm then re...
2000 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NF52T2Y
customer came in with vehicle missing. said they had it at another shop which had to replace the coils every 3 or 4 months to get it to stop missing. so we went to work on it and at idle it was missing on cyl 2 & 4 and missing on number 4 only under a load. fe... Trouble codes: 300 (multiple cyl. misfire), 420 (twc low efficiency)
2001 Pontiac Firebird 3.8L engine VIN: 2G2FS32K51
Looking for some Firebird/Camaro regulars out there. I have this leaker to work on and hope someone has run in to this before. (3.8 V-6 that is not the driest engine GM has ever designed) Car came in with a petty good oil leak at the rear of the oil pan/rear...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Cadillac DeVille 4.9L No Start VIN: 1G6KD52B0S
Thank you for all the replies , as many said it was a ground issue . A new ground strap on the coil did the trick ( I also installed a new acd module with plenty of heat tranfer ) Thanks fotr all the help .
1991 Chevrolet V1500 Suburban Scottsdale 5.7L Poor Idle Quality, Stall VIN: 1GNEV16K6M
I found that having the 400 transmission instead of the 700R4 creates a problem with the transmission harness having nothing to plug into. There is a blue wire that has to be grounded or the ECM thinks that you are in 4th gear. After bolting this wire to the t...
2001 Chevrolet Express 1500 5.7L Drivers Window VIN: 1GBFG15R31
Thanks I had several replies but 3 people said check and clean the neg battery cable. I did and problem solved. The connection looked good and was good enough to start the car and run all assesories but when I cleaned it and put it back on the problem was solv...
1996 Oldsmobile Cutlass Ciera 3.1L Stall VIN: 1G3AJ55MXT
the fix for the 96 olds cierra on the stall after warmed up situation we replaced the cam sensor and the problem is gone.
2000 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NW52E64
For those of you that said to look at the pressure sensor, go get yourselves another helping of turkey and dressing next week. A smoke test did not reveal any new leaks, any where, but a close look at the pressure reading showed a drop in pressure of less that... Trouble codes: 0440 (small leak in evap system).
2002 Pontiac Grand Prix GT 3.8L ABS light on VIN: 1G2WP12K82
thanks to all that replied, the fix was a pigtail wiring harness for the right front wheel speed sensor assembly. GM part no. [...] tested wire and it checked good so replaced it anyway due to service bulletin and the many that recommended to replace it tha...
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