Aux switch purpose

[mlwapw]

What is the purpose of this switch?

I can't find it in any manual. Thanks,

 

[Phil T]

Hill decent control

 

[mlwapw]

Hill decent control

Thanks. I’ll have to find out when to use it.

 

[H3LZSN1P3R]

Thanks. I’ll have to find out when to use it.

4low is the only time it can be used when you are going the speed you want just hit it and it will keep the speed going down hills

 

[mlwapw]

Thanks. I’ll probably never need it since I mainly just pull my fifth wheel with it.

 

[Rockcrawlindude]

 

[WRCLVR]

Cool , i just realized i have this on my 2017 3500 HO dually with AS69RC 4.10 tranny...

 

[MarkCO1]

It's one of those things I thought I wanted until I read the manual.

 

[Brutal_HO]

Cool , i just realized i have this on my 2017 3500 HO dually with AS69RC 4.10 tranny...

Interesting.

I tried adding it to my 2020 3500 HO SRW with air ride and it doesn't work.

 

[AH64ID]

Interesting.

I tried adding it to my 2020 3500 HO SRW with air ride and it doesn't work.

I thought it was a 2500 only option….