OEM off road light kit for Sport Bar

MarcS · January 17, 2018

Hey guys just wanted to give you a heads up if you are planning on installing the Sport Bar and the Off Road lights.

I have installed a couple sets of these at work, and there is a couple of SIGNIFICANT issues to be aware of:

When landing the wire into Pin 12 of the X1 connector of the BCM, there is a discrepancy between the pin count of the connector, and the pin count of the connector shown on SI (Service Information). The connector at the BCM has full rows of pin slots, IF YOU COUNT OUT FROM 1 to 12, YOU WILL NOT BE IN THE CORRECT SPOT!!!!!! On the connector end view on SI, the top row has 4 pins, the second row only has the 3 on the left, the other 4 are shown as dead space. If you simply count to 12, the lights will not work. You will curse GM, want to kill an engineer, and question your life decisions (or maybe that was just me)

The harness for the off road lights is made for both Silverado and Colorado. The sport bar comes with a model specific harness. The harness is to disable the cab mounted centre brake light, and power up the sport bar centre brake light. THE ISSUE : In the EUC where you have to remove PIN 75 from connector X1, the terminals are different on the Colorado. YOU MUST CUT OFF THE TERMINAL FROM THE SPORT BAR HARNESS AND SPLICE IT ONTO THE OFF ROAD LIGHT HARNESS.

Hopefully this saves somebody some headaches.

newdude · January 17, 2018

No need to cut and splice. Looks to be the harness is equipped for both trucks as the instructions say.

Instructions from the Silverado bar:

Quote
1. Remove the top of the UEC (1), exposing the large connectors below.
2. Locate the CHMSL circuit in cavity M6 of UEC connector X3. It will be the grey, rear, outboard connector.
1. Remove the terminal from cavity M6. It will be a VT/GY wire. Replace it with the smaller of the two terminals, with the shorter wire length on the new accessory harness.
1. Cover the terminal that was removed and the un-needed terminal from the accessory harness with vinyl tape and store them out of the way.
  
  Note: Do not cut off the terminal that was removed, the vehicle owner may want to return to the original CHMSL.
1. Reassemble the UEC making sure it is fully seated before engaging the locking levers.

Instructions from the Colorado bar:

Quote
1. The two loose terminals route around the rear and into the UEC. The 1.5 mm terminal on the slightly shorter wire is for Sierra/Silverado and the 2.8 mm terminal on the slightly longer wire is for the Canyon/Colorado. The current CHMSL on the rear of the cab needs to be disabled, because the sport bar will block it from being viewed from behind. The new CHMSL in the sport bar will replace it.
2. Remove the top of the UEC, exposing the large connectors below.
1. Locate the CHMSL circuit (VT/GY) in cavity 75 of connector X.
1. Remove the terminal from cavity 75 and replace it with the larger of the two terminals on the new accessory harness.
1. Cover the terminal that was removed and the un-needed terminal from the accessory harness with vinyl tape and store them out of the way.

Edited January 17, 2018 by newdude

Parsley · February 11, 2020

On 1/16/2018 at 9:36 PM, MarcS said:

Hey guys just wanted to give you a heads up if you are planning on installing the Sport Bar and the Off Road lights.

I have installed a couple sets of these at work, and there is a couple of SIGNIFICANT issues to be aware of:

When landing the wire into Pin 12 of the X1 connector of the BCM, there is a discrepancy between the pin count of the connector, and the pin count of the connector shown on SI (Service Information). The connector at the BCM has full rows of pin slots, IF YOU COUNT OUT FROM 1 to 12, YOU WILL NOT BE IN THE CORRECT SPOT!!!!!! On the connector end view on SI, the top row has 4 pins, the second row only has the 3 on the left, the other 4 are shown as dead space. If you simply count to 12, the lights will not work. You will curse GM, want to kill an engineer, and question your life decisions (or maybe that was just me)

The harness for the off road lights is made for both Silverado and Colorado. The sport bar comes with a model specific harness. The harness is to disable the cab mounted centre brake light, and power up the sport bar centre brake light. THE ISSUE : In the EUC where you have to remove PIN 75 from connector X1, the terminals are different on the Colorado. YOU MUST CUT OFF THE TERMINAL FROM THE SPORT BAR HARNESS AND SPLICE IT ONTO THE OFF ROAD LIGHT HARNESS.

Hopefully this saves somebody some headaches.

I am wiring the sportsbar chmsl on a new Colorado. No off-road lights, just the chmsl on the sportsbar. I have the EUC apart, but don’t know how to locate Pin 75 on Connector X1. Also any tips on removing the PIN without damaging? Any help is greatly appreciated!