MAX TRAILERING PACKAGE includes 9.76 rear axle enhanced cooling radiator revised shock tuning for increased control heavier duty rear springs and increased RGAWR and (KW5) 220-amp alternator Includes (GU6) 3.42 axle ratio when (L84) 5.3L EcoTec3 V8 engine is ordered. Includes (GT4) 3.73 axle ratio when (LZ0) Duramax 3.0L Turbo-Diesel I6 engine is ordered.
TRANSMISSION 10-SPEED AUTOMATIC with Electronic Transmission Range Selector (ETRS) electronically controlled with overdrive tow/haul mode and steering column paddle shifters. Includes Cruise Grade Braking and Powertrain Grade Braking