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Prev Professional Automotive Repair Technical Discussions for November 18, 2011
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet Caprice Classic 4.3L Hesitation, Surge, Misfire VIN: 1G1BL52W4R
Hello everybody, could use a little help on this one. This vehicle will hesitate,surge, misfire and also a slight backfire once it has been driven for approx. 30 minutes and it warms up. I have a feeling that i need to dig into the distributor but thought i wo...
1995 Chevrolet S10 4.3L 4 wheel drive light blinks
This S10 has had virtually the whole electrical & mechanicals replaced & the 4 wheel drive still doesn't work. The TCCM module, transfer case sensor, front diff sensor, actuator cable, & encoder motor have been replaced before it came to me. The lights will mo...
1995 Chevrolet K3500 Cheyenne 6.5L Electronic VIN: 1GCHK33FXS
We have codes 71 72 73 74 in current codes and 74 72 68 89 87 in history . I replaced the PCM today and all codes are the same. I have 12 volts at the trans fuse. Input speed sensor is reading over 8K not running. Gear selector on Modis reads 2nd gear all the ...
2005 Chevrolet Silverado 2500 HD 6.6L Blower Motor VIN: 1GCHK23205
Hi everyone and thanks for taking a look at my request here. Customer came in 4 months ago with a blower fan that would not run, we traced the problem to a bad blower resistor and replaced with the updated unit and wiring harness and all was well. A few day...
1998 Pontiac Trans Sport Montana 3.4L overhead controls VIN: 1GMDX03E9W
customer has water leak from overhaed controls after rain no visable holes in body but it does have a luggage rack. the only wetness is around controls rest of headliner is dry. hope someone has seen this before an has a idea. thanks jim
2001 Pontiac Firebird Trans Am 5.7L security light VIN: 2GZFV22G91
Customer bought car at auction. Another shop replaced the BCM for a power window issue apparently. Security light is always on. This uses the key with a resister "pod" in it. Always starts and runs fine, just light on. Tech 2 doesn't seem to cumminicate with s...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Cadillac DeVille 4.1L MIL Lamp on, Cooling fans run VIN: 1G6CD5187H
I really appreciate all of the insight you guys have given me. With all of the previous checks, I am about 90% certain a new PCM will correct this problem when analyzing the help offered me by this request. This customer has yet to return to the shop but whe... Trouble codes: F32 (Loss of communication between ECM and BCM).
2010 GMC Acadia SLT 3.6L Power Steering VIN: 1GKLVMED0A
Thanks for all the help guys. A new pump solved the issue and the customer went off on his merry way. Thanks guys
1994 Pontiac Trans Sport 3.8L No Start VIN: 1GMDU06L5R
Thanks for all the help. Under the icm where those grounds was off, I open the wiring harness and found one broken black and white wire. Alldata shows it to be cavity h and calls it a crank sensor ckt 646. Wiring diagram shows 646 going to crank sensor, it goe...
2007 Pontiac Solstice GXP 2.0L MIL Lamp on VIN: 1G2MG35X67
I have checked all the wiring, injectors and crank signal again. No problems found. Advised customer to take it to the dealer and have crankshaft relearn performed as several posts said this solved similar problems. I'm waiting to see if this clears it up. I ... Trouble codes: P0300, P0301, P0302, P0303, P0304.
2009 Pontiac G6 GXP 3.6L Steering Wheel VIN: 1G2ZM57759
the car has not yet been fixed but pretty sure its the steering rack customer says its doing the exact same thing as it was when the dealer replaced it rite after she got it. She is going to wait till it gets worst but thanks for all the replys appreciate it!
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