Exhaust brake on 2015 Silverado

Thanks Jim. Sounds impressive. I have the earlier less aggressive version ... I am very fond of it...
the steeper the grade the greater the fondness.

Charles

cdlaine wrote:
Does this replace the grade braking feature ?

Charles

Grade braking with the Dmax/A is a VVT system braking "Variable Vane Turbo" which acts like a exhaust brake. Early Dmax/A used a low performance program. The newer Dmax/A uses a very aggressive VVT program for much more turbo braking performance.
The program holds the turbo vanes closed longer and at a greater angle than earlier grade braking VVT programs. The Allison keeps the TC clutch locked during the event.
Great feature.

Fords also uses a VVT system as a exhaust brake.

Dodge/Ram uses a similar VGT (variable geometry turbo) system with a sliding nozzle for exhaust braking. The TC clutch stays locked with the auto tranny (Aisin or 68RE) during the event. The G56 manual tranny has no TC slippage so it works full time in forward and reverse gears down to zero mph.

Does this replace the grade braking feature ?

Charles

I have the new 2015 Dmax,you,ll love it,great interior,goes like a rocket,smooth shifting,great exhaust brake.Put it in tow haul mode and the exhaust brake is very aggressive.

In tow/haul mode or downshifting quicker on the shifter will result in more aggressive Exhaust braking. Its more effective at high RPM.

hbillsmith wrote:
I have the 2015 GMC D/A and when you activate exhaust brake with the switch on the center dash, it then automatically senses you taking your foot off the accelerator and depending on speed or descent etc., it applies the exhaust brake. I can feel it come on when approaching a stop sign for instance before I even hit the brake pedal. Its cool, I like it.

OK, thanks for that.
That's how the rest of them work as well.

I have the 2015 GMC D/A and when you activate exhaust brake with the switch on the center dash, it then automatically senses you taking your foot off the accelerator and depending on speed or descent etc., it applies the exhaust brake. I can feel it come on when approaching a stop sign for instance before I even hit the brake pedal. Its cool, I like it.

kregli wrote:
The switch activates it independent of the tow/haul. Once activated it does its thing when you press the break peddle.

You mean the EB doesn't come one unless you press on the brakes?

The switch activates it independent of the tow/haul. Once activated it does its thing when you press the break peddle.