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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 2, 2014
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Open Help Requests for GM
Help Request Answers
2009 Buick Allure CX 3.8L Windshield Washer VIN: 2G4WF58229
Tested switch for ground signal to bcm for washers, has ground and bcm shows it recieved the command on scanner also shows the pump commanded on with nothing coming out of bcm and wipers activate when washers are commanded at switch. With bcm unplugged i can r...
2011 Buick Enclave CXL 3.6L driver seat heater VIN: 5GAKVBEDXB
checked this one out for driver mirror inop up or down, found to have faulty master window switch, also asked to check seat heater-appeared to work but the led(s) out. ok, drove it and found the seat heater worked, needs a switch(seat heater). finished the dia...
2007 Chevrolet Cobalt SS 2.0L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1G1AP18P07
Car came from another shop who replaced spark plugs and air filter. All appears to be done correctly check mass air flow sensor found sings of water intrusion replaced although looked ok in data. Coolant temp ok. compression 160 in all holes. The 02 switches b... Trouble codes: P1101, P0300
2008 Chevrolet Silverado 3500 HD WT 6.6L Cooling system VIN: 1GCJK336X8
This truck only overheats when pulling a trailer. We replaced the fan clutch and fan shroud. No problems other than that. Wondering if anyone has come across this before or if you have any ideas what might be going on? Thanks in advance.

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet S10 LS 4.3L Blower Motor/ABS VIN: 1GCCS19X7V
after finding a good wiring diagram of the system was able to narrow it down to the ignition switch was only putting out 6 volts to the blower and abs. Thanks for all the replys.
2005 Chevrolet Silverado 1500 5.3L rotors VIN: 1GCEK19ZX5
Hello and thank you for all the input. Brake locking in front problem, after more research I decided to think out of the box. So what I did was shim the master cylinder from the booster about 1/8" spacer was made and installed. Road tested fine after explaini...
2008 Chevrolet Avalanche LS 5.3L No Start VIN: 3GNFK12318
This Avalanche is fixed! This Avalanche had poor terminal tension ckt 5986, terminal 17 at the FPFCM. That is the "wake up" signal from the BCM. All other terminals were good. The bulletin 07-08-49-018 Luis mentioned certainly could apply but I didn't find a s... Trouble codes: U0109 (ecm no comm with fuel pump module).
2009 Chevrolet Express 3500 LS 6.0L Poor Idle Quality, Hesitation VIN: 1GAHG35K49
Thanks for all your replies. We looked into everything and we can only find that engine vacuum is insufficient, we believe this to be a mechanical failure but we have not yet gotten approval from the customer to continue diagnosis at this time. if they decide ... Trouble codes: P0106.
2012 Chevrolet Express 3500 LT 6.0L Curtain Air Bags VIN: 1GAZG1FGXC
I appreciate the help responses received from the 3 kind techs. Further thoughts on this leads me to replace the side airbag harness(s)to be safe one will be ordered. I further will replace the side impact sensors and test the old ones and check old harness fo...
2001 GMC Yukon Denali 6.0L Front Differential VIN: 1GKEK63U61
Hi all, sorry for the delay on the post, the customer has to get his money together for the repair. We have come to the conclusion the transfer case is bad and will not replace it with a used part. We are going to replace it with an OE case. For the time being...
2003 GMC Envoy XL SLE 4.2L vents VIN: 1GKE516S73
Well I received mixed replies about this system ranging from this is a normal condition to wrong mode door actuator to re-initialization , etc...The customer brought the vehicle back , complaining that while he was in Florida with his family the system behaved...
1966 Pontiac GTO 6.4L tach
1992 Pontiac Bonneville SE 3.8L Poor Idle Quality, Stall VIN: 1G2HX53L0N
Well this thing is finally fixed. It went for a 2 week period before this thing would act up again. When it finally acted up I was losing spark. So I started running down some of the known issues with this style of ignition system. I moved the connection at IC...
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