The GMC all-new 2014 Sierra pickups are next generation pickups and are powered by the three EcoTec3 Engines, which will be a V6 4.3 Litre, V-8 5.3 Litre and V-8 6.2 Litre engine with the technology of Variable-Valve-Timing, direct injection and efficient Active Fuel Management[AFM] that will automatically switch the GMC trucks on AFM System i.e. on 4-cylinder while carrying less load, to boost fuel inefficiency  Over many days of hard work, GMC engineers has successfully delivered the increased power and efficiency to the new Sierra Engine by using the advanced computer modelling with the engine to make the best combustion process.

The V-6 4.3 Litre EcoTec3 Engine has more towing capacity with increase torque and the same base design architecture with the latest iterations of the V-8 engines – the most trusted among GMC owner over generations. The 2014 GMC Sierra V-8 5.3 Litre EcoTec3 Engine will be more efficient on fuel economy as compared to the other same