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2010 brake light question

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by snowman60, Dec 21, 2010.

  1. snowman60

    snowman60 New Member

    Are the brake lights on the chevy silverado 2010 automatic. Mine will not work unless the ignition is turned on. When the truck is on, everything works normal.
    Just wondering? Anyone have the same thing?
  2. ghotachevy

    ghotachevy Rockstar ROTM Winner

    They are controled by bcm without key on and power to it wont work
  3. Patman

    Patman Rockstar

    i thought brake lights always worked. i notice at my shop that when we do alignments the brake light always kill the batteries.
  4. ghotachevy

    ghotachevy Rockstar ROTM Winner

    Because it wakes up all the modules in the car which is like a 4 amp draw
  5. snowman60

    snowman60 New Member

    thanks - I thought it might be something like that, just wanted to be sure.

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