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Dual Function Wiring Harness

Boost Auto Parts Dual Function Wiring Harness User guide

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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
2019+ Dual Function (CHMSL) Harness Installation
Dual Function Wiring Harness
(Third Brake Light Bed Cargo & Reverse)
For 2019+ GM Trucks
2019+ Dual Function (CHMSL) Harness Installation
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
GM All Lights Mod Installation
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.
Overview: Pg. 3
Locating & Removing BCM Connector: Pg. 4
Installing T-taps: Pg. 5
Connecting Module: Pg. 7
TABLE OF CONTENTS
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
2019+ Dual Function (CHMSL) Harness Installation
For 2019+ New Body Style GM Trucks
Difculty: 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
How to Install Dual Function (Third Brake Light Cargo Light &
Reverse) Wiring Harness for 2019+ Sierra & Silverado
Your vehicle must REMAIN OFF while any BCM
connectors are removed.
Caution:
!
2019+ Dual Function (CHMSL) Harness Installation
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
GM All Lights Mod Installation
Step 2:
Remove the brown connector and pink connector
by pushing the tab inwards and pulling down.
Step 1:
Locate the BCM, which is found under the driver
side of the dash to the upper left hand side.
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
2019+ Dual Function (CHMSL) Harness Installation
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.
Step 3:
Identify the wire in pin location 26 on the pink
BCM connector. Pin 26 is located on the bottom
row, second column from the right. Wire color
may vary between vehicles, therefore, pin
locations should be your primary reference.
Disclaimer:
If your unfamiliar with T-taps, Click
Here for additional instructions.
2019+ Dual Function (CHMSL) Harness Installation
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
GM All Lights Mod Installation
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.
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.
Disclaimer:
If your unfamiliar with T-taps, Click
Here for additional instructions.
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
2019+ Dual Function (CHMSL) Harness Installation
Step 7:
Once both T-taps are installed, find the blue
marked end of the module. The marked end
needs to be plugged to the wire tapped into the
brown connector.
Proceed to bend the flexible module to
connect the other T-tap. If your unfamiliar with
quick disconnects, Click Here for additional
instructions.
Step 8:
Lastly, reinstall the connectors into the BCM.
A click sound will be heard confirming the
connector has been fully inserted.
Notice:
Make sure that the BLUEBLUE marked
side connects to the wire tapped
into the brown connector.
!!
2019+ Dual Function (CHMSL) Harness Installation
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Boost Auto Parts • 765-831-2830 • www.boostautoparts.com
GM All Lights Mod Installation
If you experience any difficulties or
complications during your install, feel free to
reach out to our Technical Support Team.
Support@boostautoparts.com
765-831-2830
Your Dual Function Wiring Harness
Install is Complete!
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