Whether you need your GMC to deliver power, economy, or a mix of both, our transmissions are engineered and built to deliver.
Proven in millions of Sierras, this transmission gives you smooth, almost imperceptible shifts with the strength of millions of miles of experience. It’s engineered for durability and control, as well as an additional tow/haul mode to handle maximum loads with ease.
Engineered for control and confidence in a wide variety of situations, our 6L80-E 6-Speed Automatic Overdrive Transmission is the ideal partner for GMC Vortec® engine power. Innovative technology and pro-grade engineering ensure that this transmission has what it takes to cut your steep climbs, long grades, and heavy loads down to size.
To conserve fuel at low speeds or under light loads, the Hybrid Electronically Variable Transmission available on Yukon models has two integrated electronic motors that work together to deliver smooth, effortless power. When you’re traveling at higher speeds or towing a heavier load, it acts as a normal automatic transmission with Yukon’s 6.0L V8 VVT engine.
GMC has partnered with Allison—the company behind the transmission in the M1 army tank—to produce the Allison 1000 series. Exclusive to GMC DURAMAX Diesel engines, its innovative features deliver the confidence you need to handle the most challenging drives with ease.
GMC transmissions are built to be smart as well as strong, with innovative technologies for greater power, control, and economy. From manual transmissions that deliver the ease of an automatic, to sensors that automatically detect when to use less or more power, acceleration, or braking, GMC transmissions deliver the performance you need, when you need it.
Included with Sierra and Yukon 6-speed automatic transmissions, Driver Shift Control gives you the control of a 6-speed manual transmission with the convenience of an automatic. Move the shift lever to “M”, and you get fingertip “tap up/down” control of transmission gear selection.
Automatic Grade Braking is one more safety feature available on GMC trucks and SUVs with a 6-speed transmission. It helps prevent unwanted acceleration and reduces the need to brake during a hill descent thanks to sensors that monitor braking, acceleration, throttle position, and even trailering conditions, and then command the transmission to remain in a lower gear if the vehicle is decelerating or coasting on a downgrade.
Regenerative braking turns the motors in Yukon and Sierra Hybrid transmissions into power generators during normal stops. The transmission decelerates the vehicle by applying resistance in the motors rather than the brakes. The captured energy gets stored in a 300-volt battery pack, ready for the vehicle’s next acceleration cycle.
Available on Savana, Sierra, Yukon, and Acadia, tow/haul mode raises transmission up-shift and down-shift points to alternately give you more power to accelerate, and greater access to engine compression for deceleration with less noise and harshness. Excess shifting when towing or hauling excessive loads is also reduced.
1. Always use safety belts and the correct child restraints for your child’s age and size. Even in vehicles equipped with air bags and the Passenger Sensing System, children are safer when properly secured in a rear seat in the appropriate infant, child, or booster seat. Never place a rear-facing infant restraint in the front seat of any vehicle equipped with an active frontal air bag.
Air bag inflation can cause severe injury or death to anyone too close to the bag when it deploys. Be sure every occupant is properly restrained. See the Owner’s Manual and child safety seat instructions for more safety information.
2. Head curtain side-impact air bags are designed to help reduce the risk of head and neck injuries to front and rear-seat outboard occupants on the near side of certain side-impact collisions. Always use safety belts and the correct child restraints for your child’s age and size, even in vehicles equipped with air bags. Children are safer when properly secured in a rear seat in the appropriate infant, child, or booster seat. See the Owner’s Manual and child safety seat instructions for more safety information.