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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 17, 2010
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Open Help Requests for GM
Help Request Answers
1996 Buick Skylark Limited 3.1L No Start, Stall, MIL Lamp on VIN: 1G4NJ52M6T
ok here it is i'm stuck every dash light is on it will start for a second and die and no rpm some times i can get it started and stay runing but it all stays the same all lights on and no rpm and i cant comunecate with the computer i just cant figer it out i w...
2001 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HP54K41
I`v been working on this car for a few weeks now. it keeps throwing a p0300 code, i hooked up my modis and found that the missfire count high on cyl 3 and 6. i changed the coil pack and rechanged the wires with same code. iv tried to do the ckp relearn but it ... Trouble codes: P0300 (Random Missfire)
1990 Cadillac Fleetwood 4.5L Unknown VIN: 1G6CB533XL
Thank you in advance for your assistance, I don't know what to do with this vehicle. It has a tevis2 system on it thatr I have never worked on before and will probably never work on one again. the brake pedal is hard as a rock most times. I did find a flow cha...
2004 Cadillac CTS 3.6L Engine VIN: 1G6DM57714
Engine has always used a little oil but recently started excessive consumption. Used 4 qts of oil on a 1500 mi road trip. Have to add oil often while driving in town. Car has had Amsoil full synthetic oil in since about 80K mi and I assume Mobile 1 prior to th...
1986 Chevrolet Camaro Z28 Iroc-Z 5.0L MIL Lamp on VIN: 1G1FP87F2G
i have tried a reman comp from GM and i tested the wireing to the maf. and i have my 12volt sorce and my 5 volt ref. the maf gm/sec reads 8 and the air flow gm/sec reads 6 i cant seem to figure out what is going on im lost. Trouble codes: 34 (mass air flow sen. low)
2000 Chevrolet Cavalier 2.4L Poor Idle Quality VIN: 1G1JF12TXY
Need help in finding this high idle problem. Idles at 1200 rpm all the time. Checked for vacuum leaks. TPS load shows 9% at idle. Tryed another used throttle body/TPS, Engine load went down to 6%, but still idled high. Removed the TPS, then plugged it in and h...
2001 Chevrolet Silverado 2500 HD 8.1L Hesitation VIN: 1GCHC23G01
Hello iatn universe and thank you for the help in advance. This problem child has me stumped. Fuel system is virtually brand new. New delco pump, regulator and fuel filter. All injectors ohm at spec ( 11-14 ohms ). Maf is good and so is map. This truck under a... Trouble codes: P0300
2002 Chevrolet Express 3500 6.5L Cuts out VIN: 1GCHG35F92
This vehicle came in from some other shop, the customer stated that some other mechanic replace the fuel pump, the glow plugs (they look new and fuel filter and also crank senor. After we inspecteded this vehicle we realize that the crank sensor was not replac...
2004 Chevrolet Tahoe LS 5.3L No Start VIN: 1GNEC13Z04
HI Y'ALL!! Tahoe was towed in as "no start-check my alternator"! Would barely start and stall! Starter may chatter like dead battery or bad switch! No communication pcm/tcm! Found codes in BCM U1000 U1016.and B 2961. Finally got U0107 from pcm and was able to ... Trouble codes: U0107 (Loss of tac serial data), U1000 (Class serial data malfuntion), U1016 (Loss of class 2 serial data vcm/pcm)
2006 Chevrolet Equinox LS 3.4L No Start VIN: 2CNDL63F76
Was towed in for a no start condition. 1st thing that was checked was the connector at the fuel pump and found the connector green. Wow figued that was pressing the easy button.. Wrong. Repaired the wiring at connector and now have fuel pressure. Still no star... Trouble codes: P0030, P0036, P0201, P0443, P0449
1999 Oldsmobile Intrigue GL 3.5L Surge, Cuts out, Misfire
the owner came in complaining about missing and no power and other times it runs semi OK. when its actting up it will not get out of its own way.checked plugs ok fuel pressure after fuel filer 38 psi . the one thing I seen on 2 different scanners it keeps drop... Trouble codes: B2961, B0300
1999 Pontiac Grand Prix GTP 3.8L Poor Idle Quality, Cuts out VIN: 1G2WR5213X
I really need help with this one. This is one of my loaner cars. 99 Grand Prix 3.8 Supercharged. The problem is that shortly after starting the car, its like all throttle control is lost. If you accelerate very slowly, it will get up to 35-40 mph but if you ac...
2003 Pontiac Montana 3.4L No Start VIN: 1GMDX13EX3
Car was a no start. On first check we had no fuel at fuel rail. Checked power at the pump and no power. Pump not coming on. Replaced fuel pump relay and still no power at pump. Replaced pump tech felt there could be a short in pump causing ground problem. Stil...
2005 Pontiac Vibe 1.8L vsc VIN: 5Y2SL66815
Hello Everyone, I have this Vibe with a VSC and sliding car light on and a code c1203. Followed the flow chart and wiring looks and test good, just wondering if any one has seen this problem and solved it without replacing the ebcm. No abs codes or lights. Th... Trouble codes: C1203 (Throttle control system)

Fixes & Summaries for GM
Fix/Summary Answers
2006 Cadillac SRX 3.6L Steering VIN: 1GYEE37160
I believe this one is fixed for now.I advised customer they should replace pump,for now they just wanted to flush pump.I ordered the GM fluid and flushed the system.The noise is gone for now,we will have to wait and see if it comes back.Thanks for all your hel...
1998 Chevrolet Monte Carlo Z34 3.8L MIL Lamp on VIN: 2G1WX12K4W
Thanks again for all the help! The sensor is missing from the pump, and the short harness, from the body to the tank, is new, and only has 4 wires, not 6. Mystery solved, but not fixed... The customer is deciding if the car is worth any further $$$... Trouble codes: P0452 (fuel tank pres sensor open/shorted).
2000 Chevrolet Tahoe 5.7L tires VIN: 1GNEC13R0X
I put 4 new tires(2 set) on this vechicle and it took care of the viration!Must of had a bad set frustrating to say the least.Thanks for all the help!
2005 GMC Sierra 2500 HD SLT 6.6L No power VIN: 1GTJK33255
Sorry for the late close on this as customer had to take the vehicle and has not returned for the repair yet ...Thank you to all who replied, your responses were very helpful in diagnosing this vehicle. I am going to call this fixed even though I have not fi... Trouble codes: P1093 (Fuel rail psi low during power enrichment).
1989 Oldsmobile Cutlass Supreme International 3.1L MIL Lamp on VIN: 1G3WR14T5K
Many of the replies centered around the grounds, esp the one for the 02 sensor. I checked at the computer for good grounds, they were fine. Another suggestion was the engine cooling down, i.e. bad thermostat. That was also OK. Other suggested possibly a bad co... Trouble codes: 13 (02 sensor bad open short).
1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55M7T
This one is fixed. As usual we should all go to our gut feelings when things don't seem right. While I can't explain the strange MAP readings at the scanner, it is what it is. 4 of ya'll hit the problem on the head but Mike from Indiana gets the prize for ap... Trouble codes: P0401.
2004 Pontiac Grand Am SE1 3.4L Compressor VIN: 1GNF52E34M
well i would thank everyone who had input on this vehicle i found the problem and i have repaired this vehicle,someone had installed a aftermarket alarm system on this vehicle and it was tied into the ingnition switch but on the wrong wire causing this problem...
2002 Saturn LW300 3.0L Tcc VIN: 1G8JW84RX2
Draining the transmission, found water contamination. Replacement of fluid and filter somewhat improved the TCC slip but still not a complete fix. Customer chose to take the vehicle as-is and see if it improves. I doubt it will, but they will likely live with ...
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