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However most RPO codes that are promoted to model names are appearance packages only, and are not related to speed or engine performance. Two examples are the Z28 and Z71. In the 1980s you could order a Z28 Camaro with a 2.5 liter engine, although this was rare. RPO Z71 was an off-road suspension for trucks that is not related to the drivetrain ...
The 6.6L Duramax diesel engine (VIN code "L") is used on 2010 interim and 2011 Chevrolet Express and GMC Savana vans and 2011 Chevrolet Silverado/GMC Sierra HD trucks with RPO ZW9 (chassis cabs or trucks with pickup box delete). The LGH engine is rated at 335 bhp (250 kW) at 3,100 rpm and 685 lb⋅ft (929 N⋅m) at 1,600 rpm.
GM was the first manufacturer to introduce an electronically-controlled fuel injection system into a diesel pickup truck. [2] The L49 (VIN "P") and L57 (VIN "Y") are both naturally aspirated engines. L57 is listed as HO or Heavy Duty. Additional RPO codes are LQM 175 hp (130 kW) and LQN 190 hp (142 kW).
The 6.2 L; 376.0 cu in (6,162 cc) EcoTec3 is a Generation V small-block V8 truck engine (VIN code "J"). The L86 is an LT1 engine modified for truck use with a compression ratio of 11.5 to 1. In 2019, GM introduced the L87 as the successor to the L86. Power and torque remain the same, but whereas the L86's "Active Fuel Management" alternates ...
detuned with different components, RPO code L2R 2023–present 231 kW (310 hp) @ 5600 RPM: 390 lb⋅ft (529 N⋅m) @ 2000 RPM 2023–present Chevrolet Colorado and GMC Canyon: 231 kW (310 hp) @ 5600 RPM: 430 lb⋅ft (583 N⋅m) @ 3000 RPM 2024–present Chevrolet Tahoe and GMC Yukon 223 kW (300 hp) @ 5500 RPM
The Vortec 2200 (RPO code L43) is an OHV straight-4 truck engine. This engine is equipped with secondary air injection, and is flex-fuel capable. It is entirely different from the Iron Duke, and was the last North American iteration of the GM 122 engine. The 2200 uses an iron block and aluminum two-valve cylinder head.