BOOST AUTO PARTS Dual Function Wiring Harness User Guide
- June 4, 2024
- Boost Auto Parts
Table of Contents
AUTO PARTS Dual Function Wiring Harness
User Guide
INTRODUCTION
This document will be covering the installation of our Dual Function (Third
Brake Light Bed Cargo & Reverse) Wiring Harness on 2019 and newer GM trucks.
This will get the center high mount stop lamp (CHMSL) cargo lights on your
Silverado or Sierra to work as both a cargo light and a reverse lamp. This
installation requires no additional tools and will take only 5 minutes to
complete.
This procedure is for 2019-2022 new body style GM Trucks. For exact fitment
reference the product page.
Boost Auto Parts offers a variety of items and accessories for your GM Trucks.
To purchase additional parts and accessories Click Here.
How to Install Dual Function (Third Brake Light Cargo Light & Reverse) Wiring Harness for 2019+ Sierra & Silverado
For 2019+ New Body Style GM Trucks
Difficulty: Easy
Tools Needed: None
Parts Needed: Dual Function (Third Brake Light Bed Cargo & Reverse)
Wiring Harness
Video Tutorial: 2019 – 2022 GM Third
Brake Light Bed Cargo & Reverse Install
Caution:
Your vehicle must REMAIN OFF while any BCM connectors are removed.
Step 1:
Locate the BCM, which is found under the driver side of the dash to the upper
left hand side.
Step 2:
Remove the brown connector and pink connector by pushing the tab inwards and
pulling down.
Step 3:
Identify the wire in pin location 26 on the pink BCM connector. Pin 26 is
located on the bottom row, the second column from the right. Wire color may
vary between vehicles, therefore, pin locations should be your primary
reference.
Step 4:
Utilizing the T-taps provided, attach one to the corresponding wire found in
slot 26 on the pink connector. For additional leverage, pliers can be used to
close T-taps.
Disclaimer:
If you are unfamiliar with T-taps, Click Here for additional instructions.
Step 5:
Identify the wire in pin location 26 on the brown BCM connector. Pin 26, is
located on the bottom row and the first slot from right. Wire color may vary
between vehicles, therefore, pin locations should be your primary reference.
Step 6:
Utilizing the T-taps provided, attach one to the corresponding wire found in
slot 26 on the brown connector. Make sure to completely close the T-taps for a
proper connection.
Disclaimer:
If you unfamiliar with T-taps, Click Here for additional instructions.
Step 7:
Once both T-taps are installed, find the blue marked end of the module. The
marked end needs to be plugged into the wire tapped into the brown connector.
Proceed to bend the flexible module to connect the other T-tap. If you are
unfamiliar with quick disconnects, Click Here for additional instructions.
Notice:
Make sure that the BLUE BLUE marked side connects to the wire tapped into the
brown connector.!!
Step 8:
Lastly, reinstall the connectors into the BCM.
A click sound will be heard confirming the connector has been fully inserted.
Your Dual Function Wiring Harness Install is Complete!
If you experience any difficulties or complications during your installation,
feel free to reach out to our Technical Support Team.
Support@boostautoparts.com
765-831-2830
Boost Auto Parts • 765-831-2830 •
www.boostautoparts.com