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Also, a continuously variable oil pump helps to lower parasitic losses as well as providing proper lubrication and cooling to the engine, especially under high-load conditions. [1] The Active Fuel Management system can shutdown the middle two cylinders under low-power conditions. [2] Cylinder liners are spun nodular iron. [2]
It was launched in the all-new 2014 Chevrolet Silverado and GMC Sierra 1500. [12] 2021 was its final model year in the Chevrolet Silverado and GMC Sierra 1500, as the 6-speed automatic transmission was phased out. The Chevrolet Express and GMC Savana are the last vehicles to use the 4.3L but do not feature Active Fuel Management and their ...
Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy .
The engine gained new 29,000 PSI piezo injectors as well as a completely reworked fuel system which was now powered by the Bosch CP4 pump, that also now supports up to 20% biodiesel mixtures and a urea injection (to reduce nitrogen oxides) with a 5.3 gallon DEF tank. This engine has a fuel injector in the exhaust tract, to allow raw fuel ...
5.3L V8 Chevrolet Silverado; 5.3L V8 Chevrolet Tahoe; 5.3L V8 Chevrolet Suburban; 5.3L V8 Chevrolet Avalanche; 3.5L V6 Chevrolet Impala; 5.3L V8 Chevrolet Express; 3.9L V6 Chevrolet Uplander; 2007. Impala; 5.3L Chevrolet Silverado; 4.6L Ford Crown Victoria (2-valve, excluding taxi and police units) 5.4L Ford F-150 (3-valve) 5.3L GMC Sierra (LMG V8)
Many owners tried to solve this by adding anhydrous alcohol, a common trick to deal with water in fuel, but this instead dissolved fuel pump seals and other parts. The stretchy fuel-pump timing chain was a minor problem in light of the other issues. Poor dealer service training only made all the problems worse. [8]
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