Recommended Wiring For The Third Brake Light Of A Camper Shell On A 2021 GMC Sierra 1500

Updated 07/10/2023 | Published 07/07/2023

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3rd Brake Light Logic Module

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Question:

Looking for a wiring harness plug and play for 2021 GMC sierra for a camper shell for brake lights, interior light and electric lock. is their anything available? Thanks

asked by: Don J

Expert Reply:

There isn't a plug and play option available but you can make your own by installing the 3rd Brake Light Logic Module
# PP20-702 and using bullet connectors when you attach it to the camper shell's wiring so that you'd be able to remove the shell without having to cut the wires. This module will splice into your truck's left and right turn signal wires and will have one wire for power going to the camper shell. The camper shell should have a power wire to connect to and a ground wire that you'll want to run to the frame. You could use a bullet connector for this wire as well to make removal of the shell easier.

expert reply by: Kevin C