Parts Needed to Flat-Tow a 2018 Buick Envision  

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Helpful Expert Reply:

In order to flat-tow your 2018 Buick Envision with all four wheels on the ground you will need a base plate kit, tow bar, flat-tow wiring harness, safety cables, supplemental braking system, and possibly a high-low adapter. I have attached my recommendations for each of these parts below.

For a base plate kit I recommend the Roadmaster EZ5 Base Plate Kit part # RM-523188-5 as it has removable arms which makes for a clean look while not in tow and it will not require a bulky crossbar. The tow bar I recommend to use with this base plate kit is the Roadmaster Sterling All Terrain part # RM-576 which mounts on the motorhome and includes safety cables.

For a flat-tow wiring harness I recommend the Roadmaster 4-Diode Universal Wiring Kit part # RM-152-98146-7 because it is a very popular options that works really well. Please note that fuse(s) must be pulled during towing so I also recommend the Roadmaster FuseMaster Fuse Bypass Switch part # RM76512. The supplemental braking system I recommend is the Roadmaster InvisiBrake Supplemental Braking System part # RM-8700 which makes for a clean install once finished but you will also need the Roadmaster Stop Light Switch Kit part # RM-751482.

Finally, you may or may not need to use a high-low adapter. In order to determine if there is a need to use one measure from the ground to the center of the base plate kit on the vehicle and compare that distance to the measurement from the ground to the top of the inside edge of your trailer hitch on the motorhome. If this distance is not within 3" of one another then you want to use a high-low adapter which I have attached a list of for you in addition to several other review videos on the above products.

expert reply by: Conner L

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