Poor Terminal Contact at BCM Connectors May Cause Electrical Issues on Pontiac G6

Various electrical issues may be caused by poor terminal contact at the body control module (BCM) electrical connectors. Proper diagnoses will be required to confirm faults are related to poor BCM connections.

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Average mileage: 81,157 (20,000–200,000)
6 model years affected: 2005, 2006, 2007, 2008, more2009, 2010
43 people reported this problem
32 people shared problem details
2009 Pontiac G682,000
door ajar light constantly on horn will go off, in the middle of the night interior lights stay on while driving dash registers: key fob battery low waiting to install a new BCM
6 people like thisFlag inappropiate
2007 Pontiac G666,000
brake lights don't work right,cruise control doesen't work right,radio doesn't work right, door locks don't work correctly
6 people like thisFlag inappropiate
2009 Pontiac G640,000
First noticed as cruise stopped working. Dealer applied diaelectric grease to BCM connectors, worked for about one day. Then I realized my brake lights were on all the time, dealer replaced Brake Pedal Position Sensor (BPPS). Worked great for 5 days. Now dealer thinks the BCM needs to be replaced because they cannot even calibrate the BPPS but htey may try another new BPPS first. Very frustrating, dangerous, and costly.
4 people like thisFlag inappropiate
2007 Pontiac G690,000
Car wont start, security light on. Told to replace BCM. 1 yr later same problem returns!
4 people like thisFlag inappropiate
brake lights come on while driving and not pushing the brake...after pushin brakes they go off but come back on and stay on
4 people like thisFlag inappropiate
2008 Pontiac G690,000
Brake lights stay on while driving and won't go off till I press or tap the brakes. When I release the brake lights come back on with in 3 to 5 secs later. I have replace the brake switch twice and it fixed it for 2 or 3 days but the problem returns
3 people like thisFlag inappropiate
2008 Pontiac G6128,000
Same problem with brake lights. They go on when driving and off when pedal applied. There is a recall for G6 up to 2007 for this due to fatal accidents. Still waiting on 2008 and up recall. Quick fix pull the BCM and lube the heck out of it with dielectrical grease. Wiggle it back into place and push it in hard. Try brakes again - if lights are still on put more grease on it. Issue being is the connectors on the BCM are corroding, you can also clean the connectors and grease it up too. Due to poor placement condensation from AC creates humidity and corrosion with the BCM. Been dealing with this issue for a few years now.
3 people like thisFlag inappropiate
Rear middle brake light always on
2 people like thisFlag inappropiate
2005 Pontiac G6155,000
My lights wouldnt go off, and now nothing in my car works,
2 people like thisFlag inappropiate
2007 Pontiac G674,000
Brake lights come on when shifting out of park and stay on until I put it back into park! can't drive it, BCM and recalibration/programming to expensive so I have a perfectly good car (except the fore mentioned) and haven't moved it out of my garage for a year!
2 people like thisFlag inappropiate
2006 Pontiac G660,000
Key fobs didn't work, clock on radio would constantly reset to midnight, airbag warning light comes on intermittently and various other electrical issues. Spent hundreds diagnosing and replaced BCM- didn't resolve problem. Then mechanic checked vehicle battery- it was low and needed to be replaced- all problems resolved.
1 person likes thisFlag inappropiate
2007 Pontiac G660,000
Brake lights work on and off - I was told by the GM dealership that I need to get a new BCM before more problems occur.
1 person likes thisFlag inappropiate
2008 Pontiac G664,000
My cruise control stopped working:(
While driving, pressing the gas to the floor, barley goes. Gradually gains speed. Once it's going, it cruises...without touching the gas pedal at all!! The engine light & Traction Control lights came on and the display states the engines power has been reduced. The lighter plugs/ports no longer work, either one. On my way for diagnosis/repair now.
2005 Pontiac G6200,000
As we are driving,cruise control shuts off 3 different times within 10 min. Then steering started to go.. All dashboard lights start flickering and you can hear it clicking. We stop the car,shut if off,then started back up again. Lights still were on,steering was back but after driving for about 5 mile everything seems ok..
2010 Pontiac G657,000
wiring connector to the headlight low beam right side got hot turned brownish in color it also continues to burnt out bulbs tis is a hard to find pigtail replacement part
2010 Pontiac G660,000
Headlight low beams do not work. Move wiring harness around and they will work for a short amount of time before not functioning again.
i changed my alternator three times and still my battery light comes on and it's a new battery smh changed the connector to the alternator still nothing
2007 Pontiac G670,000
Brake lights staying on
2009 Pontiac G682,000
Brake lights come on when driving and not using brakes, and turn off when pushing on the pedal.
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