Does Check Valve of SMI DUO Braking Kit Have to Be Used to Install in 2018 GMC Canyon
Updated 03/07/2018 | Published 03/05/2018
Question:
I am installing the SMI DUO in a 2018 GMC Canyon with a Diesel engine . The motor already has a factory check valve between the motor and the brake booster per picture . My question is do I also need to install the SMI check valve and where should it be located if I do , I have ran the motor and the brakes are working normally but the SMI controller will not pull the brake pedal down , any ideas ? Thank you
asked by: Terry V
Expert Reply:
You do have to install the check valve of the SMI DUO part # SM99251 to your 2018 GMC Canyon. What you sent in a picture of doesn't appear to be a check valve. It looks like it may be a tee valve or possibly a vacuum reduce so you would want to install the check valve of the DUO like the install instructions indicate as well as install video I attached that shows this installed on a similar Colorado as your Canyon.
Product Page this Question was Asked From
Demco Stay-IN-Play Duo Flat Tow Brake System for RVs w/ Hydraulic Brakes - Proportional
- Flat Tow Brake System
- Brake Systems
- Proportional System
- One-Time Setup
- Vehicle Battery
- Fixed System
- Power Assist Brake Compatible
- Hydraulic Brakes
- Indicator Lights
- Demco
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Base Plate for Tow Bar
- Shop: Vehicle Tow Bar Wiring
- Shop: Curt Custom Tail Light Wiring Kit for Towed Vehicles
- Shop: Replacement 6-Amp Diodes for Blue Ox Tow Bar Wiring Kit - Qty 12
- Video: What to Know About the Demco Vacuum Tee Fitting for Factory Brake Booster Sensor Port
- Shop: Towed Vehicle Battery Charge Line Kit for Demco Air Force One and Stay-IN-Play Duo Braking Systems
- Shop: Demco Vacuum Tee Fitting for Factory Brake Booster Sensor Port - Air Force One and Stay-IN-Play Duo
- Q&A: Service Stability Control Error Message After Demco Air Force One Install on 2.0 Turbo Jeep Cherokee
- Shop: Vehicle Tow Bar Brake System
- Shop: Roadmaster Battery Charge Line Kit for Towed Vehicles
- Shop: Blue Ox Patriot Portable Flat Tow Brake System - Proportional
- Shop: Replacement 3/8" Vacuum Check Valve for Roadmaster InvisiBrake and Second Vehicle Kit
- Q&A: Which is Better Roadmaster or Blue Ox Tow Bar
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Breaking Down the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Search Results: base plate for tow bar
- Q&A: How to Replace a Lance 6-Pin Plug w/ a Standard 7-Way Connector
- Shop: Suspension Enhancement
- Article: How to Measure for Trailer Hitch Drop
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Video: Comparing Portable Flat Tow Braking Systems - Curt RVi and Blue Ox Patriot
- Q&A: Replacing 6-Way on Trailer With 7-Way Connector
on Flat Tow Brake System
