I had the same exact issue when i replaced my third light. I took my new light apart, and moved some of the wire connectors around. Now it only comes on when i press the break pedal or when i activate the cargo light...and im fine with that.
Newb here,
I have found myself seeking the wisdom of the people of this wonderful forum, for a project I am strongly adamant on doing. A "Heads Up Display" project for my K1500 (1994 Sierra 5.7 Liter) to display the speed onto the windshield.
Seeing as my truck is pre-1996, I am stuck with a...