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elle · 03-14-2016, 07:19 PM

Brake in the Allison is nice! I just bought a 15 GMC with a 6.0 and it has a grade braking button. Haven't used it yet but I assume it works like the Allison.

Nothing pulls like a diesel but unless you need the mpg its a waste of money.

03-14-2016, 07:19 PM	#13
elle Join Date: Jul 2011 Posts: 478 iTrader: (0)	Brake in the Allison is nice! I just bought a 15 GMC with a 6.0 and it has a grade braking button. Haven't used it yet but I assume it works like the Allison. Nothing pulls like a diesel but unless you need the mpg its a waste of money.