TAC Tips Spring 2018
We are resolving a number of cases every day and wanted to share some of the great conversations and tips we’ve had from across the country. Follow-up on Twitter or Facebook for a regular update.

Contributor: ACDelco’s Daily TAC Tip comes from the team at ACDelco’s Technical Assistance Centre.

April 17, 2018 
Thanks to our program member from:   Grande Prairie, AB
Vehicle: 2007 GMC Sierra 1500 4WD
Condition: Engine will not start and is not cranking. There is no communication with BCM and has code U0140 in ABS module. Shop has tried a new BCM and SPS programming was saying that the module already has the latest calibration installed.
Agent recommendation:  Check the GMLAN low and high speed, but all symptoms suggest replacing BCM.
Solution: BCM must be replaced again as the one received has already been installed and programmed on another vehicle. It was returned to parts distributor, replaced again with another new one and reprogramming was successful and vehicle work normally.

April 10, 2018 
Thanks to our program member from:    Boisbriand, QC
Vehicle: 2008 GMC Sierra 2500 HD 6.6L Duramax
Condition: Trailer brakes are inoperative (original equipment installation). Trailer brake control module has been changed and same results with no current going to the trailer brakes.
Agent recommendation: Check configuration with BCM for compatibility.
Solution: When a module for trailer brakes is replaced, a trailer must be hooked up and driven in order for the module to see the vehicle speed sensor.

April 3, 2018
Thanks to our Program member from: Guelph, ON
Vehicle: 2010 Chevrolet Traverse
Condition: Engine has misfires on Bank 1 but nothing looks abnormal.
Agent recommendation: After talking with the technician, it was found that the engine had been recently replaced with remanufactured engine from GM. Agent suggested to check the camshaft according to published TSB for REMAN engine and to check for chaffing harness at rear of engine.
Solution: Found the rear engine ground was not tight enough when engine was replaced. Torque ground after cleaning it solved the issue.

March 27, 2018
Thanks to our Program member from: Brownsburg, QC
Vehicle: 2012 Hyundai Elantra
Condition: Crank, no start intermittently, code P1696 in PCM memory.
Agent recommendation: Suggest checking the immobilizer coil around the ignition key for loose or bad contact.
Solution: Replaced the immobilizer coil and reprogrammed the ignition keys. Vehicle is now OK.

March 20, 2018
Thanks to our Program member from: Saguenay, QC
Vehicle: 2006 Buick Rendez-Vous 3.5L
Condition: Defective EGR valve, after replacing it has code for EGR in ECM.
Agent recommendation: Check when an EGR kit is used for modification on the EGR connector. TSB 06-06-04-003D must be applied.
Solution: Checked according to bulletin and modifications were made to connector. Vehicle is now OK with no DTC.

March 13, 2018
Thanks to our Program member from: Perth, ON
Vehicle: 1991 Chevrolet Corvette
Condition: Vehicle is unable to communicate with ECM and BCM intermittently and speedometer is erratic.
Agent recommendation: Check powers and grounds to ECM. Also try a tap test on ECM.
Solution: Tap test on ECM showed communication cutting in and out. Replaced ECM.

March 6, 2018
Thanks to our Program member from: Guelph, ON
Vehicle: 2009 GMC Acadia 3.6 L
Condition: No start and no communication with scanner.
Agent recommendation: Check engine ground on backside of the engine, as it is a known issue.
Solution: Ground bolt was loose.

TAC Information 

We’re listening! ACDelco’s TAC team listens because they know how frustrating it can be to get good sound advice when it comes to vehicle diagnostics.

It pays to get it done right, and fast - the first time!
That’s the objective for all of our ACDelco Technical Assistance Centre licensed technicians. To get your problem diagnosis dealt with quickly and correctly…and of course, to just be there to listen.

ACDelco Technical Assistance Centre – Diagnostic Hotline
Live Technical support via phone – available 60 hours a week!
Contact the ACDelco Info-Line for further details. 1-800-263-3526 prompt 2

The ACDelco TAC line is fully staffed with multi-lingual technicians Monday – Friday from 8am-6pm EST, ensuring they are available to take your call (or fax, or email). In English or French, our qualified TAC agents will be ready to answer your questions.

The TAC line uses the most advanced technology and current repair databases, in addition to detailed case information and data mining. Our agents have full access to common failure causes and repair procedures databases. Access to these cases can help solve the most complex requests.

Our TAC Specialists
ACDelco’s TAC line has master technicians supporting Domestic, European and Asian import vehicles. The breadth of experience includes:
  • Working directly with vehicle manufacturers and aftermarket suppliers
  • Class training delivery
  • Field experience
  • Auto body and collision repair
  • Heavy-duty and military powertrain experience

Systems Support
ACDelco’s TAC agents have a lengthy list of technical resources and databases to support your complex questions. This includes factory OE information, as well as internal technical experts, field engineers, product specialists, and technical writers for several OEM's.

Resource databases include all major all makes manufacturers. Additional repair databases include Alldata, IATN, Mitchell1, Automotive Service Profession, eSI and more.
Access to Service Technical Specialists include the following manufactures: GM, Mercedes Benz, VW, Audi, Ford, Lincoln, Mercury, Chrysler, BMW, Volvo, Honda, Nissan, SAAB, Toyota, Hyundai, & KIA.