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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 7, 2019
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2014 Buick Verano 2.4L lights VIN: 1G4PS5SK4E
Carcame in no crank-dash lights flashing codes u0121/u0140 loss of comm with bcm ebcm indenfix pointed to a 12 pin connector in trunk if i disconnect that and reconnectit car will start and runbut i don't have any communication with air bag module and ligh...
1997 Chevrolet Blazer 4.3L readiness monitors VIN: 1GNDT13W7V
this vehicle was brought to me with the explanation that it had been to numerous shops and owner was told that it needed 3 o2 sensors to put the light out and run a drive cycle to complete readiness monitors,and then it would pass state emissions for stick...
2003 Chevrolet C4500 Kodiak C4C042 6.6L No Start VIN: 1GBC4E1183
Thanks for help in advance. I am no diesel expert and this truck proves it. Truck came in as a no start . Engine cranks ok (210 rpm ) but does not start. Frist tried priming low side fuel system till plunger was hard to push, truck still a no start. Checke...
2007 Chevrolet Silverado 2500 HD Classic LS 6.6L ABS Erratic VIN: 1GCHK23D27
Customer complains about ABS activation at random times. When it happens, he feels vibration at pedal and truck darts to right. ABS light will come on and stay on. ABS will still activate while light is on. Monitoring data - all speed signals are synched. ...
2008 Chevrolet Equinox Sport 3.6L timing chains VIN: 2CNDL03718
Towed in as no-start. Dead battery. Checked oil and coolant, full and no leaks. Charged battery overnight. Cranked up in morning and can hear obvious no compression. Have not had the pleasure of one of these yet. Every thing I have read says likely no inte...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Chevrolet Silverado 3500 6.6L No Start, Stall, Loses the fuel prime VIN: 1GBJK39225
Unfortunately, the customer has needed the vehicle and has been using it as is. When we get it back to finish it, I will post the fix. We did get some useful info. Checking the vacuum on the fuel lines and using clear hose to check for air in the lines are goi...
2008 Chevrolet Silverado 2500 HD LTZ 6.0L Trailer brake control
The last test in sequence requires the test light to be lit when you command it on through scan tool. Never got it to light using the manual control, Going to call this one a bad TBCM and customer declined replacing it but I did install a aftermarket brake con...
1996 Pontiac Grand Am GT 3.1L heat VIN: 1G2NW12M7T
Thanks for the 22 replies to solve this issue. Listing the possibilities which it was not: 1)a plugged heater core 2)rotted water pump fins causing poor flow 3)clogged "restrictor" in the line to the heater core inlet 4)the need for an auxiliary pump to in...
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