Engine Advances

Better fuel economy comes from GM advanced engine technology.

  • Variable Valve Timing

    Some of GM's most popular engines feature VVT, and GM was the first manufacturer to mass produce cam-in-block engines with VVT. By adjusting the timing of the intake and exhaust valves, variable valve timing:

    • Optimizes combustion for performance and economy
    • Helps optimize emission performance
    • Enhances the existing outstanding balance of power, efficiency, low emissions and NVH (noise, vibration, handling) engineered into the engine

  • Active Fuel Management

    Active Fuel Management saves fuel by using only half of the engine's cylinders when driving with a light load, and seamlessly switching to all cylinders when needed for brisk acceleration or for hauling heavy loads. One million vehicles with V8 and V6 engines have Active Fuel Management.

  • Vehicles with Active Fuel Management

    • 2008 Chevy Avalanche

    • 2008 Chevy Impala

    • 2008 Chevy Silverado

    • 2008 Chevy Suburban

    • 2008 Chevy Tahoe

    • 2008 Chevy Tahoe Hybrid

    • 2008 Chevy Trailblazer

    • 2008 Pontiac G8 GT

    • 2008 Pontiac Grand Prix

    • 2008 Saab 9-7X

    • 2008 Buick LaCrosse

    • 2008 GMC Envoy Denali

    • 2008 GMC Sierra

    • 2008 GMC Yukon

    • 2008 GMC Yukon Hybrid

    • 2008 GMC Yukon XL

  • Spark Ignition Direct Injection

    Engines with this technology:

    • Inject the fuel directly into the cylinder like a diesel
    • Allow the engine to breathe more air for greater torque and horsepower
    • Have increased compression ratio (for improved performance and fuel economy)

  • Clean Diesel Technology

    A catalytic converter, particulate filter, cooled Exhaust Gas Recirculation (EGR) system, and variable-geometry turbocharger are used with the DURAMAX 6600 diesel to drastically reduce exhaust emissions even during quick driving changes.

    Available GM vehicles with Clean Diesel Technology include:

  • Engine Advances News

    » Get the latest GM engine advances news releases.