Parts Needed to Flat Tow 2015 GMC Sierra 2500
Question:
Hi, I have a 2015 GMC Sierra 2500HD Denali. Can this vehicle be flat towed? Also, what equipment will I need to mount this truck? It will be towed behind a 2018 Newmar ESSEX. Do I really need the suplimental braking system and light kit or could I do without that? Thanks in advance
asked by: Carter H
Expert Reply:
Yes, your 2015 GMC Sierra 2500 can be flat towed, and you MUST have a light kit and a supplemental braking system is also required by law in most states so you can check with your local authorities to find out if it is required where you are going to be flat towing.
There are a number of parts you're going to need in order to do this, starting with compatible base plates. I recommend the Roadmaster MS Base Plate Kit # RM-3180-2 so long as the truck is a 4 wheel drive, which I assume it is. For a tow bar I recommend going with the Roadmaster Falcon 2 Tow Bar # RM-520 because of how easy the tow bar is to connect to the base plates as well as its long arms, which make it easier to maneuver when towing; you will also need safety chains # RM-643.
For wiring kit that will allow your Sierra's lights to function while being towed you can use the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154. Please note you need to disconnect your battery and you need to research GM Technical Service Bulletin 13-00-89-007 for info on disconnecting the battery; Quick Battery Disconnect # RM-766 is recommended unless your truck is a diesel or has dual batteries.
As I mentioned, a supplemental braking system is a requirement in most states and I highly recommend the Air Force One # SM99243. It's designed specifically for motorhomes with air brakes, like your Newmar Essex, so there isn't any false braking. False braking is caused by a lot of other braking systems that trigger the vehicle's brakes when the coach's brake lights are activated.
Finally, it is likely you will need a high-low adapter such as # RM-076 to keep your tow bar level with your tow vehicle. The adapter you need is going to depend on some measurements you'll need to take. I have added a link to a help article on high-low adapters which explains the measurements you'll need, as well as a link to our page with our selection of adapters.
Products Referenced in This Question
Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 6" Rise/Drop - 6K GTW, 200 lbs TW
- Accessories and Parts
- Tow Bar
- Hitch Adapters
- High-Low Adapter
- Fits 2 Inch Hitch
- 6 Inch Rise/Drop
- Roadmaster
more information >
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Pole Flat Connectors
- Tow Bar Wiring
- Splices into Vehicle Wiring
- Diode Kit
- Universal
- Tail Light Mount
- Roadmaster
more information >
Roadmaster Falcon 2 Tow Bar - RV Mount - 2" Hitch - 6,000 lbs
- Tow Bar
- Hitch Mount Style
- Telescoping
- Steel
- 6000 lbs
- Fits Roadmaster Base Plates - Crossbar
- Fits Roadmaster Base Plates - Direct Connect
- Stores on RV
- Standard
- Roadmaster
more information >
RoadMaster 68" Single Hook, Coiled Safety Cables - 6,000 lbs
- Safety Cables
- Coiled Cables
- 68 Inch Long
- 6000 lbs GTW
- Snap Hooks
- Coated Cables
- Roadmaster
more information >
Roadmaster Battery Disconnect with Switch for Towed Vehicle w/ Flat Tow Brake System - Gas
- Accessories and Parts
- Tow Bar Wiring
- Auto Battery Disconnect
- Roadmaster
more information >
Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- One Time Set-Up
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Demco
more information >
Product Page this Question was Asked From
Roadmaster Direct-Connect Base Plate Kit - Fixed Arms
- Base Plates
- Fixed Drawbars
- Roadmaster
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Video: Demco SBS Air Force One Supplemental Braking System Installation - 2015 GMC Sierra 2500
- Article: Flat Towing Package for 2015-2018 GMC Sierra 2500
- Q&A: Parts Needed to Flat Tow 2015-2018 GMC Sierra 2500 4WD Behind RV
- Q&A: Parts Needed to Flat Tow a 2015 GMC Sierra 2500
- Shop: Base Plate for Tow Bar
- Shop: Vehicle Tow Bar Brake System
- Shop: Brake Controller
- Shop: Trailer Wiring
- Search Results: tekonsha p3 mounting bracket
- Search Results: p3 brake controller
- Search Results: 5th wheel plug
- Search Results: base plates
- Shop: Roadmaster BrakeMaster for RVs w/ Air or Air-Over-Hydraulic Brakes - Proportional
- Shop: Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Shop: Pollak 5th Wheel / Gooseneck T-Connector with 7-Pole - Ford, GM, Dodge, Nissan w/ Factory Plug
- Shop: Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Shop: etrailer XHD Non-Binding Tow Bar for Blue Ox and Curt Base Plates - RV Mount - 2" Hitch - 10.5K
- Shop: Brake Buddy Select 3 Portable Flat Tow Brake System - Proportional
- Video: Blue Ox Patriot Portable Braking System Installation - 2022 Ford F-150
- Q&A: Choosing Between the Brake Buddy Select 3 and the Blue Ox Patriot Supplemental Braking System
- Shop: Vehicle Tow Bar Wiring
- Article: Best Vehicles to Flat Tow Behind an RV
- Search Results: tow bar
- Video: Review of Blue Ox Tow Bar Braking Systems - Patriot Portable Braking System - BLU37TR
- Article: Roadmaster Vehicle Specific Base Plates
- Q&A: All Parts Needed to Flat Tow 2014 Chevy Silverado 1500 Behind Motorhome
- Video: Blue Ox Patriot Radio Frequency Portable Braking System Review
- Search Results: base plate
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
on Base Plates
