Heavy-duty 6-speed electronically controlled automatic transmission

  • Overdrive gear for smooth, efficient operation
  • Tow/Haul mode and Auto Grade Braking that reduce the amount of conventional braking needed while towing or traveling downhill to help reduce brake wear
  • Cruise control that maintains a set speed up and down grades, even when towing a heavy trailer in mountainous terrain (works with Tow/Haul mode and Auto Grade Braking) 
  • Requires the Vortec® 6.0L V8 SFI engine