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Well 07burb the 3rd brake light is how the TAC module knows when the brakes are applied to cancel the cruise just seeing if anyone had the same problem and a fix for the problem and yes rocken I did verify the brake light does work

so the cruise control doesn't work on my 2003 tahoe. computer controlled. the third brake light was out and I replaced with an oem led light still no cruise control. when I take a normal bulb and wire it into the third brake light cruise control works what do I do to get my oem third brake to...