4.2L GM LL8 Application Data:
12575091 2002–2003 Chevrolet Trailblazer, Envoy (ST1)
Note: when using this engine for 2002 application, change sparkplug and knock-sensors oil pan to 2002 parts. Includes throttle body assembly, intake manifold, ignition coils, dip stick tube and dip stick, front cover, water pump, harmonic balancer, crank
sensor, injector harness, flywheel, exhaust manifold, belt tensioner, and oil pan (2003 application).
12599934 2006 Chevy/GMC Trailblazer, Envoy (ST1)
2006 Chevrolet SSR (ST1)
89017685 2004–2005 Chevrolet Trailblazer, Envoy (ST1)
Note: When used for 2004 and prior, exhaust cam position actuator and
fuel rail-ASM must be changed to 2004 and prior parts.