2019 Hill Assist

[doverarjim]

OK, just noticed today that when I pulled up at a stop sign on a hill the truck did not "hold" in place when I took my foot off the brake???  Did they take Hill Assist off the L5P, or does it only work now with tow/haul turned on???  Does anyone know?  

[Gmman]

Mine on my 2017 works any time even on slight inclines.

[JimCost2014]

1 hour ago, doverarjim said:

OK, just noticed today that when I pulled up at a stop sign on a hill the truck did not "hold" in place when I took my foot off the brake???  Did they take Hill Assist off the L5P, or does it only work now with tow/haul turned on???  Does anyone know?  

Straight from the owners manual:

Hill Start Assist (HSA)

This vehicle has a Hill Start Assist

(HSA) feature, which may be useful

when the vehicle is stopped on a

grade. This feature is designed to

prevent the vehicle from rolling,

either forward or rearward, during

vehicle drive off. After you

completely stop and hold the vehicle

in a complete standstill on a grade,

HSA will automatically activate.

During the transition period between

when you release the brake pedal

and start to accelerate to drive off

on a grade, HSA holds the braking

pressure for a maximum of

two seconds to ensure that there is

no rolling. The brakes will

automatically release when the

accelerator pedal is applied within

the two-second window. If the

vehicle is equipped with the

Integrated Trailer Brake Control

(ITBC) system, HSA may also apply

the trailer brakes. It will not activate

if the vehicle is in a drive gear and

facing downhill or if the vehicle is

facing uphill and in R (Reverse).

There may be situations on minor

hills (less than 5% grade) with a

loaded vehicle or while pulling a

trailer where HSA may activate.

If you release the brake pedal and

then reapply the brake pedal while

HSA is activated, the brake pedal

typically feels firmer with less pedal

travel.

 

[redwngr]

Works as advertised (and as JimCost2014 post) on my 2018 L5P/Allison combo.

 

GM order guide said no changes for 2019 HD's (other than colours, and cab/box/chassis combo restrictions for plant changeovers)

 

It doesn't hold for long.