Love the tuned in turbo brake on my LMM. Had NO problem stopping my truck with a 10,000 hitch pull with 3500lbs of payload in the truck, dont even need to use the brakes on the highways.
I also use it on the one local hill here unloaded... its pretty dang steep for 2-3 miles. I can easily slow my truck down to 30-35 with the turbo brake with no brakes where as id have to apply the brakes constantly to keep it under 45.
2008 Silverado 3500HD LTZ LMM CCLB DRW:
Limitless Built trans, Diamondback ATV bedcover, Maghytec pans, Amp powersteps/bumper step, weathertechs, FASS liftpump, ATP EFI Live, 5" straightpipe, SDP 3" ybridge EGR delete, 3" downpipe, HIDs, Recon smoked lights all around, Beans sump, Edge CTS, DMAXstore driveshaft, MOVE DIY bumpers, 68G attatank, autometer EGT/boost gauges, banks hotside, DRP trans lines, DDP 4" intake, PPE trans cooler, mishimoto rad hoses, Rare HD tierods/pitman/idler arm/idler assembly, AirLift 5100, 6" Zone lift, Eagle Alloy 054s wrapped in 275/65/20 SST Pros, Main Event Emblems, Overkill fab grille, HSP billet manifolds/uppipes, LFS traction bars, 2015+ mirrors