4-speed automatic transmission

Engineered to provide smooth, seamless shifts, the electronically controlled 4-speed automatic transmission with overdrive comes standard with the Vortec® 4.3L V6 MFI and 5.3L V8 SFI engines for control and confidence. It includes Tow/Haul mode, helpful when pulling a heavy trailer or a large load through rolling terrain. Tow/Haul mode adjusts the transmission shift pattern to reduce shift cycling, providing increased performance, vehicle control and transmission cooling while trailering.