Recommended Supplementary Braking System for Flat-Towed 2008 Hummer H3 with Power-Assist Brakes

Question:

I have a 2008 Hummer H3 with a 5.3 V8 I want to flat to this behind my motorhome. I tried to use a Brake Buddy that I was using from another car but apparently this is not recommended due to the Hummers electrically assisted brake system. What system do you recommend? Thank You.

asked by: Phil S

Expert Reply:

We offer several options for supplementary braking systems for the 2008 Hummer H3 that has the power-assisted brakes. The linked page will let you see all of them. These include both systems that require only a one-time set up, like the SMI Stay-IN-Play DUO # SM99251, and systems that require a recurring set up each time you use it, such as the Roadmaster BrakeMaster # RM-9060-900002 for RVs with hydraulic brakes.

Depending on your RV you may need the Roadmaster Brake-Lite Relay Kit # RM-88400. This is required on towed cars with combined lighting if you are using a supplemental braking system.

expert reply by: Adam R