Download 2007-2011 Cadillac Escalade Led Third Brake Light Installation Step 1: Verify kit contents. Step 2: Open window on rear hatch. Step 3: Remove (3) Torx – head bolts located above window and set aside. Step 4: Remove (2) 10mm nuts located above the hinges on the rear hatch and set aside. Step 5: Gently close the window and lift the factory third brake light upward. Step 6: Remove the factory wiring harness from the brake light assembly. Step 7: Remove the (4) 10mm nuts located on the rear of the brake light housing. Step 8: Remove the factory third brake light from the assembly and replace with the Putco brake light. Step 9: Replace the (4) 10mm nuts that were removed from the rear of the brake light housing. Step 10: Place the third brake light assembly above the rear hatch and connect factory wiring harness. Step 11: Position the brake light properly and open rear window. Step 12: Reinstall the hardware that you removed in Step 3 and Step 4 and close window. Note: If your light does not turn on verify the connection between the factory and Putco wiring is secured properly.