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Prev Professional Automotive Repair Technical Discussions for December 5, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1990 Cadillac DeVille 4.5L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 1G6CD5338L
THis vehicle has no miss. When you put it in drive it does't stall. It only acts up when you are going down the road. When you accelerate it surges up and down. Any helpful suggestions would be appreciated thanks
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1995 Cadillac DeVille 4.9L No Start VIN: 1G6KD52B65
Hello, I've been working on the Cadi for going on 4 weeks. This car came to me without any maintenance at all. Still oem wires, o2's plugs, you get it. Cold start problem, low fuel pressure every morning, once the car is started no problems. If you cycle the s...
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2004 Cadillac DeVille 4.6L body VIN: 1G6KD54Y74
Hello everyone; I hope someone can help out. This car came in for a vibration at low speed. It is a higher frequency noise that can be felt in the steering wheel and the body. It almost sounds like a noisy level ride compressor or a.i.r. pump (buzz or hum) It ...
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1995 Chevrolet Blazer 4.3L computer VIN: 1GNDT13WOS
Vehicle will not comunicate with smog machine.Scan tool comunicates no problemb 2007 domestic or global obd2, no trouble codes.Replaced vcm with used unit with no change.I had simular problemb with a simular vehicle vcm fixed it.Not so lucky this time.Does smo...
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1996 Chevrolet Blazer 4.3L engine VIN: 1GNDT13W7T
car came in for a no start found air intake boot ripped replaced air intake boot got car to start and run but has a random missfire on all cylinders checked cam sensor found at 1000 rpm would go to -6 adjuted to -1 at 1000 rpm replaced spark plugs,cap,rotor st...
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2001 Chevrolet Malibu 3.1L tcc lock up VIN: 1G1ND52J91
came in with code p0741- tcc inop. and fluid burnt with only 51k, replaced trans and test drove and code came back, replaced valve body and drove and code came back, took to dealer and had tsb for similar problem and had reflashed and all seems ok but when dri...
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2001 Chevrolet S10 4.3L hvac VIN: 1GCCT19W81
hey all, this truck has intermitant poor air flow from vents on heating (did not notice problem in summer with a/c). after approx 2 hours of driving hwy the mode switches and almost no air flow can be felt from any one vent, seems to be like a stuck blend door...
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2004 Chevrolet Malibu Maxx LS 3.5L steering VIN: 1G1ZT64834
most of the time you have to keep pushing right on the steering wheel to keep it going straight.when idling you can turn to the right it returns faster and further then when you turn to the left? .customer had it alighn in 04/2008 . instaled new GM column in...
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2005 Chevrolet Aveo LS 1.6L strut mounts VIN: KL1TD52625
hey all. this little car makes noise in the front suspension. taced it to worn strut mounts. replaced mounts and now its back with same noise. the mounts have worn to the shape of the strut socket of the body. the body is concaved and the mounts are flat. the ...
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2006 Chevrolet Equinox LT 3.4L Temp Air Door VIN: 2CNDL63F56
Hi This car came in with an inop temp door. Upon Inspection it was determined that the door was broken where it connects to the door actuator. I ordered a new door from GM and after installing the door the actuator will not line up without putting way too much...
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2007 Chevrolet Malibu LS 3.5L horns VIN: 1G1ZS58F07
hey guys thanks in advance. this car was driven in because the horn was blaring and would't stop. when she got here it had burn't out the horns. the strange thing is if you pull out the relay power stops at the horn. when the relay gets plugged back in the pow...
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2001 GMC Savana 2500 5.0L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GTFG25M11
i am working on 2001 gmc 2500 van with 5.0 engine.check engine light was on po200 and po300 codes were store in ecm and engine was running very rich.we replaced the fuel injectors as an assembly.engine ran fine for 1000 mile and came back with same problem aga... Trouble codes: P0300, P0200
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2006 GMC Envoy SLE 4.2L No Start, Misfire, MIL Lamp on VIN: 534811GKDT
I was going to clean the injectors on my sons truck and we decided to pull the fuel pump relay to shut the pump off.Must have caused something to go wrong because the truck wouldn't turn over at all(prior to this there was no problems at all).Put the relay bac... Trouble codes: P0300 (multiple misfire), P0443, P0506, P0787, P0973, P0976 (shift solenoid B control circuit low)
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2006 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL65846
this vehicle came to us from other shop they had replaced the pcm for the ses light coming on.wereplaced every sensor we could think that would be related to a post 02 sensor ciruit fault and have monitored the circuit for false voltage readings but have not s... Trouble codes: P0136, P0136
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Roadmaster 5.7L heater VIN: 1G4BN52P9R
thanks for the help we ended up putting a 180 F thermostat in it flushed the coolant due to electrolysis had about 900mv in coolant, and coolant was rusty in color. customer didnt want to spend the money for a heater core, i do believe she needs a heater core ...
16
1997 Cadillac Seville SLS 4.6L abs VIN: 1G6KY549VU
vehicle is fixed 3 e,mails were right on the money , replace left speed senser harness , and there was a tsb to do this , thanks to all who helped kevin
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2000 Cadillac Catera 3.0L Cuts out VIN: W06VR54R7Y
Hello. I would like to thank the three people that replied for their time.It turned out to be the mass air flow sensor. It's well understood that the practice of clearing codes when only one service is performed is not the best, but when the boss dictates t...
3
1986 Chevrolet Corvette 5.7L Voltmeter VIN: 1G1YY078XG
Thanks to all that responded. I still didn't get that tsb. I am pretty sure that all it is is an explanation as to this being a normal condition, and i just wanted to show that to the customer. Some guys are just really stubborn, and just don't want to believe...
12
1994 Chevrolet C3500 Cheyenne 6.5L Stall VIN: 1GBKC34FXR
It was the PMD witch had already been replaced.Thanks for all the help almost everyone got it correct.
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1998 Chevrolet C2500 Cheyenne 6.5L Poor Idle Quality, Surge VIN: 1GCFC29S1W
I replaced the injection pump, problem is gone, truck runs great! Thanks for the help
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2000 Chevrolet Prizm 1.8L MIL Lamp on, P171 VIN: 1Y1SK528SY
I WENT THROUGH ALL THE READINGS AND COMPARED TO WHAT ALL DATA HAD AGAIN AND THEY WERE STILL ALL CORRECT SO I JUST PUT A MAF SENSOR IN IT TO SEE WHAT HAPPENS AND IT FIXED THE CAR AND THE LT FUEL TRIM IS 5% RIGHT WHERE IT SHOULD BE. THANK YOU FOR ALL THE HELP. Trouble codes: P0171.
7
2004 Chevrolet Silverado 1500 5.3L gearbox? VIN: 1GCEK19T04
RECIEVED 14 POSTS ON THIS ONE-MOST CONCERNING THE STEERING SHAFT LUBE PROBLEM.WE HAD RUN INTO SEVERAL WITH THAT MALADY AND REPAIRED THEM BUT THIS NOISE WAS'NT A CLUNK OR POP ON TURNS BUT A OBVIOUS VIBRATION TRANSMITTING UP THROUGH WHEEL.ALSO NOTED RETURN HOSE ...
14
2005 Chevrolet Avalanche 1500 5.3L No Start, Poor Idle Quality, Stall VIN: 3GNEK12T35
A very good cleaning of the t-body and double injector flush seams to be fixing these trucks. The one that still had a complaint hasnt booked in for further diag so unfortunatly i will need to close without knowing. Poss they need some relearn on the closed tr... Trouble codes: P101, P300.
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2000 GMC Savana 2500 5.0L evap, O2 heater VIN: 1GTFG25M2Y
Thanks to all who responded..And yes, being in Pa., the vehicle would have passed emissions testing with two monitors not run. The problem was that the coolant and air temps were too far apart, and after letting the customer take the vehicle home and driving i...
7
2004 GMC Savana 2500 4.8L steering box (front end) VIN: 1GTGG25V04
First of all may I say this is the first time using this resource I am overly impressed with the help and responses,as far as the repair went we changed the steeering box agaign although both boxes were brand new AC delco, the second one seems to have cured th...
14
1998 Oldsmobile Aurora 4.0L shift interlock VIN: 1G3GR62C6W
The customer called and stated that he had not had any more problems with the vehicle since he had us look at it. Thanks to all who replied, however i'm afraid I dont have much in the way of what repaired the vehicle?!? Again thanks to all who replied! Steve
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2001 Pontiac Grand Am SE 3.4L codes in pcm VIN: 1G2NF52E81
while we found several problems with tampering on this vehicle we did not get cruise control to work yet.we have u1000 code in pcm immediately after clearing.we did find drivers speaker in door was disconnected which cured our missing chime alarm.we repaired c... Trouble codes: U1000 (serial 2 communication).
5
1999 Saturn SL 1.9L MIL Lamp on VIN: 1G8ZF5285X
had to wait for customer to return with vehicle. she said light would come on every so often, not regularly. Well we got extremely lucky while checking our connections again the ugly fault raised it's head. The new sensor would drop the signal. Ordered a new o... Trouble codes: P0500 (vss malfuntion).
4
2005 Saturn Ion-2 2.2L Cuts out VIN: 1G8AJ52F95
The pedal fixed the problem. I did monitor the data and looked at the graph and never saw a drop out in the data or the graph. I also couldn't duplicate the problem and for some reason the freeze frame data didn't help. I may have missed something while testin... Trouble codes: P2138 (accelerator pedal position sensor).
2
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