Consists of engine block, crankshaft, connecting rods, pistons, piston rings, cylinder head assembly (including valve train components), lifters, camshaft, balance shaft (if equipped), timing gears and chain, timing chain dampener, and oil pump, unless otherwise specified.
RPO - LU3
2003 - 2005 Chevrolet Pickup (T1)
2003 - 2005 GMC Pickup (T1)
2003 - 2005 GMC Jimmy (T1)
2003 - 2005 Chevrolet Blazer (T1)
2003 - 2005 Chevrolet Astro (LM1)
2003 - 2005 GMC Safari (LM1)