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Pontiac Repair/EBCM replacement


so i have a 2008 pontiac g6 with the 3.5. i had issues with trac control light coming on and service traction on evic coming up. brake lights would come on all the time except when actually braking. used a tech 2. has checksum error codes in ebcm. also bpps would not calibrate. replaced brake sensor. no help. would not hold a calibration. kept getting checksum errors. replaced ebcm. dealer said programming required. so i used the tech 2. programmed the bpps and now all but one code are gone. a new code. c0558- unknown code with tech 2 and there is no service info. is there a differenet type of programming that needs to be done that im missing. did i get a bad ebcm? anything helps

Hi Matt:

a few things here the ebcm need to be programmed VIA Gm's web site to get the proper calibartion for the EBCM. I think your just doing a "set up" which is the final step. You need the programming done first. as for the brake light issue I bet you have an issue called fretting of eletrical terminals. it's a build up of corrosion on the terminals and it effect the ckts where they connect at the BCM. unplug BCM connector x2 it's labled J2 on the bcm take the connector off and apply dieletric grease to the terminals and then reconnect the connector to the BCM work the plug in and out a couple of times before you finally seat it into the BCM then recalibrate the BPPS. Good luck :-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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