Will Roadmaster Automatic Battery Disconnect Work on 2021 GMC Sierra 1500 AT4

Question

Question:

Will this work for 2021 AT4? GM says that the negative and positive both is supposed to be disconnected.

asked by: Eddie R

0

Expert Reply:

I checked with Roadmaster to verify, and your 2021 GMC Sierra 1500 AT4 is compatible and will work with the Roadmaster Automatic Battery Disconnect with Switch # RM-766.

The only caveat is if you have a diesel engine as the battery disconnect is not compatible with a diesel engine on any vehicle. In regards to the positive terminal being disconnected, I could find no mention of that anywhere. I took a look at the latest owner's manual available for the '21 Sierra and it only states, on page 394, to disconnect the negative terminal.

I have added a link below to a video install on a '20 Sierra 1500 for you to take a look at as well of the Roadmaster Automatic Battery Disconnect with Switch # RM-766.

expert reply by: Kyle S

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Answer 1

For your application you'll need to go with the Blue Ox Base Plate Kit #BLU24TR since Roadmaster doesn't currently (September 202) have a fit listed for the all new 2022 Chevy Silverado 1500 Refresh. If you already have a Roadmaster…

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Answer 2

The correct battery disconnect to use for your 2021 Chevy Silverado 1500 is the Roadmaster Automatic Battery Disconnect with Switch #RM-766. This makes disconnecting your battery as easy as pressing a button instead of having to physically get…

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Answer 3

I checked the owner's manual for your 2021 GMC Yukon XL, and yes, it is perfectly fine to flat tow. That being said, you are going to need these components: - A base plate - Tow bars - Braking system - Tow bar wiring - High-Low adapter For a…

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Answer 4

The basic flat towing components for your 2022 GMC Sierra 1500 AT4 include a base plate kit, tow bar, safety cables, vehicle tow bar wiring, a supplemental braking system, and possibly a high-low adapter. There may be a few other parts to make…

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Answer 5

According to Roadmaster, the reason GM says that the negative side of the battery must be disconnected is a standard shop procedure. If you use hand tools (wrench) and start by removing the clamp on the positive side of the battery, then you might…

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Answer 6

After looking at the manual for your 2021 GMC Yukon, it seems like you're following the manufactures directions correctly. here are the steps you followed. 1. Position the vehicle being towed behind the tow vehicle, facing forward and on a…

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Answer 7

I reached out to my contact at Roadmaster, and the Roadmaster Automatic Battery Disconnect with Switch for Towed Vehicle w/ Supplemental Braking System #RM-766 can only be used on the positive terminal of the battery as that is what the polarity of…

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Answer 8

I checked with Roadmaster and the RM-766 cannot be used with the diesel engines likes what you have in your Silverado. The lighting kit part #RM-152-98146-7 will fit and work great in your 2020 Chevy Silverado 1500.

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Answer 9

I reached out to my contact at Roadmaster and he confirmed that the Roadmaster Direct-Connect Base Plate Kit #RM-523198-5 and Crossbar-Style Base Plate Kit #RM-523198-4 will NOT interfere with the adaptive ride control system on your 2020 Sierra…

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Answer 10

The Blue Ox Base Plate Kit - Removable Arms, #BX1736 is a confirmed fit for the 2021 Chevrolet Silverado 1500. I see no exceptions listed for the diesel models. If you do not already have the needed tow bar, supplemental braking and other items…

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Answer 11

I've never heard of an actual third brake light connector on a camper shell to plug in on a truck and we don't carry any parts to do that. The light generally needs to be hardwired into the truck's brake light circuit. The…

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Answer 12

Since Demco uses 3,500 drum brake assemblies part #DMSB24429M and #DMSB24428M what you'd need is similar 3,500 electric brake assemblies like the etrailer part #AKEBRK-35L-SA for the left hand side and #AKEBRK-35R-SA for the right hand side.…

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