Question for GM guys Edit: Mystery solved!

B17-P51

A friend of mine (older Gent) just bought a 2016 Chev 1500 pickup at a house auction and it has the Factory trailer brake option on it  There was no manual with this truck. The controller is on the left upper dash above the headlight switch. In between the brake controller and the headlight switch is a horizontal slot that is about the size of a credit card, like at an ATM. Does anyone know what this slot is for? This truck is 4 WD but has a manual selector on the floor for that.

lkannes

There isn't such a slot on mine.

Warbirds

In my truck- the factory trailer brake is very similar and the knob looking thing adjust the brake control for the trailer.

Bubba Jr.

The 2 knobs at the top will activate the trailer brakes without using the vehicle brakes when they are squeezed together. The plus and minus buttons will adjust the pressure on the brake shoes so you can fine tune it depending on the load.

Joe

B17-P51

I did some research and found this photo and possible explanation. Answer appears to be for a ..... Credit card or parking pass. In other words nothing. We both thought it may be some kind of programming port or something but it seems to be nothing.
https://www.gmtruckclub.com/threads/what-is-this-slot-in-my-dash.1420934/

B17-P51

lkannes said:

There isn't such a slot on mine.

I think that's because yours has the 4WD selector there. This truck has the tried and true floor mounted lever for the transfer case.

select-fire

Squeeze the two knobs together where the slot is. That will manually stop the trailer

gjshaw

https://forums.gunbroker.com/discussion/comment/11226184#Comment_11226184

+1

Butchdog2

That slot is not a slot for anything,, just a cut out for the right "lever" to move left to engage the brakes by hand.

jimdeere

On a Chevy, it’s a slot to put nickels and dimes in.

kannoneer

More like $100 bills!

B17-P51

Nope mystery solved ! , but thanks everyone that replied. It is just a slot, that's all. It has nothing to do with vehicle operation. If you don't have a trailer brake. and your selector is on the floor , there is a little cubby there, so there actually is 3 possible looks to that left side upper panel of the dash on that year / model.
Found this on a GM forum:
https://www.gmtruckclub.com/threads/what-is-this-slot-in-my-dash.1420934/