Parts Needed and Process to Flat Tow 2019 GMC Sierra 1500  

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Expert Reply:

The process required to flat tow your 2019 GMC Sierra 1500 can be found starting on page 405 of the owner's manual, and I strongly recommend checking your version. The steering column will be unlocked in the process when turning the ignition key to the ACC/ACCESSORY position in Step 7 or Step 11 if you have Keyless Access. What it says is:

To dinghy tow:

1. Position the vehicle being towed behind the tow vehicle, facing forward and on a level surface.
2. Securely attach the vehicle being towed to the tow vehicle.
3. Start the engine.
4. Shift the transfer case to N (Neutral)
5. With the engine running, release the parking brake and verify that the transfer case is in N (Neutral) by shifting the transmission to D (Drive) and then to R (Reverse). There should be no movement while shifting the transmission.
6. Shift the transmission to D (Drive).
7. If equipped with an ignition key, turn the ignition to ACC/ACCESSORY. If equipped with Keyless Access, turn the engine off. Disregard the Shift to P (Park) DIC message
8. Disconnect the negative (–) battery cable.
9. Shift the transmission to P (Park).
10. Move the steering wheel to make sure the steering column is unlocked.
11. If the vehicle has an ignition key, keep it in the towed vehicle in ACC/ACCESSORY to prevent the steering column from locking. If the vehicle is equipped with Keyless Access, keep the RKE transmitter outside of the vehicle and manually lock the doors. Access the vehicle by using the key in the door lock.

Here are the parts you will need in order to flat tow your 2019 GMC Sierra 1500:

- Base Plate Kit: Demco Classic Base Plate Kit # DM29FR
- Tow Bar: Demco Excali-Bar III Non-Binding Tow Bar # DM9511013
- Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267
- Supplemental Braking System: SMI Stay-IN-Play DUO Supplemental Braking System # SM99251
OR
- If your motor home has air brakes: SMI Air Force One Supplemental Braking System for Motor Homes with Air Brakes # SM99243

I have added links to video reviews and installs for you to check out as well.

expert reply by: Kyle S

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