Braking and Electrical Parts Needed to Flat Tow a 2021 Chevrolet Colorado Gas or Diesel
Updated 01/08/2026 | Published 01/07/2026
Products Featured in This Question
Question:
I have a 2021 Chevrolet Colorado 4X4 that I want to flat tow behind a 2017 Thor Chateau E450 Super Duty using a Demco towbar setup. What is the recommended braking system for this setup? Thr RV has hydraulic brakes.
asked by: Glen L
Expert Reply:
Hey, Glen!
The best brake system for your 2021 Chevrolet Colorado is going to be the Demco Stay-IN-Play Duo Braking System part # DM86VR. Once installed it will make flat towing easy especially with the wireless monitor you will have with you in the front of the RV.
I did go ahead and check into all the other electrical parts you will need to flat tow. If you have a gas model you will need the Roadmaster Battery Ace battery disconnect part # RM39ZT. However, if you have a diesel model you will need to get a different battery disconnect, you will need part # RM93MR. You will also need one for each battery so if you have 2 batteries, you will need to get two of part # RM93MR. Lastly, you will want to get diode kit part # RM-15267 for all the taillight functions.
Is this your first flat tow set up or have you flat towed in the past with your Thor Chateau?
(click to enlarge)
Product Page this Question was Asked From
Demco Tabless Base Plate Kit - Removable Arms
- Tow Bar Base Plate
- Removable Draw Bars
- Twist Lock Attachment
- Completely Hidden
- Demco
more information >
Featured Help Information
Instructions
Continue Researching
- Search Results: demco flat tow brake system
- Shop: Roadmaster Battery Ace Battery Disconnect w/ Key Fobs - Gas Only
- Shop: Base Plate for Tow Bar
- Shop: Demco Tabless Base Plate Kit - Removable Arms
- Search Results: demco stay in play duo
- Search Results: tow bar base plate
- Video: In-Depth Review of the Demco Battery Disconnect Switch
- Video: Review of Roadmaster Flat Tow Wiring Harness - Battery Disconnect - RM39ZT
- Search Results: roadmaster battery disconnect
- Shop: Vehicle Tow Bar Brake System
- Search Results: battery disconnect switch
- Shop: Demco Stay-IN-Play Duo Braking System for RVs w/ Hydraulic Brakes - Wireless Monitor - Proportional
- Shop: Vehicle Tow Bar Wiring
- Video: Demco SBS Stay-IN-Play DUO Braking System Installation - 2021 Jeep Wrangler
- Video: Set up: Demco Tabless Base Plate Kit on a 2022 Chevrolet Colorado
- Video: Mount: Roadmaster Direct-Connect Base Plate Kit on a 2022 Chevrolet Colorado
- Shop: Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Shop: Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Shop: Trailer Wiring
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Trailer Hitch
- Search Results: kuat pivot
- Search Results: 10~19 seal
- Shop: Roadmaster BrakeMaster w/ Pressure Reducer for RVs w/ Hydraulic Brakes - Proportional
- Video: DIY Install: Curt Trailer Hitch Receiver on your 2016 Audi Q5
- Video: 2014 Audi Q5 Curt Trailer Hitch Receiver: Complete Installation
- Shop: BOLT brand vehicle and hitch locks
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Lug Nut Torque Chart for Trailer Wheels
on Tow Bar Base Plate
Glen L.
1/7/2026
We have been installing some items to prepare. We installed a battery disconnect switch and a CURT wiring harness with diodes. We have a Demco towbar and ordered the base plates yesterday from eTrailer. I'll go ahead and order the Demco system soon. Thanks for the quick reply.