Supplemental Braking and Flat Tow Lighting Recommendation for 2013 GMC Terrain

Question:

Want to install smi stay-in-play duo system what will turn on running lights at night. Also I donot have a trailer package to wire to can I use 56094 Curt harness to hook up to the unit.

asked by: Jack F

Helpful Expert Reply:

The SMI Duo kit part # SM99251 is a fantastic option for supplemental braking for your 2013 GMC Terrain. It does not operate the taillights of the vehicle though so you'd need to go with a setup designed for that as well.

For lighting you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight housing. This will splice into your taillight wiring to allow your tow vehicle to control the taillight assemblies of the towed vehicle. This comes with a round 6-way connector that you will install on the front of your towed vehicle and enough coiled wire to go from there to the RV. I attached an install video for this kit for you to check out as well on a similar GMC Terrain.

expert reply by: Jameson C