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Prev Professional Automotive Repair Technical Discussions for April 4, 2012
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Starter VIN: 3G5DB03E82
Hello fellow tech's This Rendezvous came in on the hook. Customer says car was working ok. When they went out to start it the next day it did not turn over. First thing I did what scan the PCM, BCM, cluster, etc. The PCM had a oil pressure code other than tha...
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2002 Cadillac Escalade 6.0L MIL Lamp on VIN: 1GYEK63N92
this truck got a p 1639 code always i have my 5 volts at tps but i cant see the tps volts on my scanner i have unplugged the egr the mass but still the same my tank fuel press is betwen 0.50 and 2.25 v and i could not unplug it whitout removing the fuel tank .... Trouble codes: P1639
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2007 Cadillac Escalade 6.2L CMP actuator VIN: 1GYFK63847
After getting the car back with the same code for the second time we tried the oil change again, this time with no luck. the code returned after a few days. Using the tech II and commanding the CMP actuator when the engine is cold the system operates normall...
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1996 Chevrolet W3500 Tiltmaster W3S042 5.7L No Start VIN: 4KBB4B1RXT
I have checked and have reference volts to all sensors.No codes.No spark no injector pulse.I feel there is a ground problem but can,t find where ecm is grounded.On a regulator truck it would be on thermostat housing.I don,t have wiring diagram for vehicle.If s...
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2005 Chevrolet Malibu 2.2L No Start, Cuts out VIN: 1G1ZS52F15
This Malibu has an intermittent stall, followed by a no crank situation. Last week it had a laundry list of codes, the only one that would re-occur is for the +/- shift buttons on the shifter. If you are interested, I can post them. According to the owner, a... Trouble codes: P0340, P0601
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2005 GMC Canyon Z71 SL 2.8L No Start, No crank VIN: 1GTDT19865
Hello fellow techs. I am working on this gmc Canyon which has an intermitant no start no crank. The security light does not blink but stays lit. Sometimes it takes many tries over 15 to 30 minutes, but eventually decides to start. after it startes it runs fine...
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2008 GMC Sierra 1500 WT 4.8L MIL Lamp on VIN: 1GTEK19C68
This is a strange one does not set codes all the time you might have to drive 4 or 5 times to set codes. Trouble codes: P0174, P1175, P2271
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1998 Oldsmobile Silhouette Premiere 3.4L Excessive Emissions VIN: 1GHDX03E5W
Having problems with this one. Stalls when cold. When it warms up the ltft -25%, stft -3 to 3%. I know its running rich. I can't increase ltft, i've tried numerous things. Has new cat. Once the computer adjusts the ltft to -25% it runs fine but when it sits ov...
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Chevrolet S10 4.3L 4wd Hi VIN: 1GCCT19W6Y
I installed one aftermarket encoder motor which stuck in 4 hi and would not come out, decided to purchase the second one from the dealer which carried me back to the original complaint of no 4hi after about a week of operation. Thanks to Bruce from Ontario sho...
8
2004 Chevrolet C4500 Kodiak C4C042 6.6L lacks power VIN: 1GBE4C1214
sorry for the delay, the lack of power was from me accidently flipping the pto switch, thanks for the replies. Trouble codes: U0106.
3
1996 GMC K2500 Suburban 7.4L No Start, Stall VIN: 3GKGK26J6T
Customer has car and problem seems to be gone - but the problem disappears every summer when evening temps never get below 70. And next winter, the problem will return, he predicts. I could have tested a few more things in the short time I was with it and negl...
21
2001 GMC Yukon SLE 5.3L Poor Idle Quality, Stall VIN: 1GKEC13T21
Thanks for all the input from everyone. The fuel pressure was good, 56 lbs, the throttle body was clean, all of the mentioned grounds were fine as were every ground wire I could find. The smoke machine and other methods found no vacuum leaks. I reset the compu...
17
2007 GMC Sierra 1500 Classic SL 4.3L Safety VIN: 3GTEC14X57
hey guys thanxs for all the replies. what I ended up finding was a poor ground under the drivers seat. the handheld code retriever did not draw enough amperage to upset the network.repaired ground and was able to retrieve airbag code for passenger side module....
6
1986 Oldsmobile Delta 88 Royale 3.8L Instrument lights
Hello, This was an update to this vehicle. We were able to repair it. The fix is posted in this second original request. Thanks again to everybody who responded to my brother's problem. Bob
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2003 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NW52EX3
I want to thank everyone that took their time to help me with this car. For the last week I've tried to get this to act up again for me, no luck. Several techs suggested to check the wires from the 7x sensor to the module. This short harness wasn't re installe...
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2009 Pontiac G6 2.4L Abs Tcs Ecm VIN: 1G2ZG57B69
Thanks to all, Dave from PA had it.. the harness had chaffed through, this was on the transmission cooler tube line. Exposing a wire which appears to have been a Class II data line. What havoc it caused much appreciated Danny from Il. Wayne from Il. Roger f...
5
2003 Saturn Ion-2 2.2L No Start VIN: 1G8AJ52F33
CAR IS NOT FIXED BUT I WILL POST SOME MORE INFORMATION. I HAD ANOTHER CUSTOMER WITH 06 CHEVY HHR WHICH HAD RUN/CRANK RELAY SO I PUT MY SCANNER TO MONITOR RUN/CRANK RELAY COMMAND WHILE CRANKING AND IT WAS COMMANDING ON. I BELIEVE FIX IS GOING TO BE THE BCM SINC...
7
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