The GM L84 is a 5.3L V8 engine from General Motors' Gen V small-block family, used primarily in the Chevrolet Silverado 1500, GMC Sierra 1500, and Tahoe/Suburban/Yukon platforms. It produces 355 horsepower and 383 lb-ft of torque, and features Active Fuel Management (AFM). The GM's cylinder deactivation system that allows the engine to run on four cylinders during light-load conditions to improve fuel economy. While the AFM system improves efficiency on paper, it has a well-documented history of causing lifter failures, which is the primary reason many L84 owners find themselves sourcing a replacement engine. When buying aused L84, many buyers specifically seek units from vehicles where AFM was disabled via tuning, which significantly extends lifter life. Always confirm AFM history and request a compression test covering all eight cylinders before purchase. moon auto parts available wide range of inventory explore now!

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