The L52 (also called Vortec 3500), is a straight-5 DOHC engine. It displaces 3,460 cc (211 cu in), with a 93 mm (3.7 in) bore and 102 mm (4.0 in) stroke. Dynoed at the flywheel it produces 220 hp (160 kW) at 5600 rpm and 225 lb·ft (305 N·m) at 2800 rpm, while producing 179.13 hp (133.58 kW) at 6001 rpm when dynoed at the rear wheels[citation needed]. Engine redline is 6300 rpm.[WIKI]
The LLR (also called Vortec 3700), is a straight-5 DOHC engine. It displaces 3,653 cc (223 cu in), courtesy of a larger 95.5 mm (3.76 in) bore while keeping the 102 mm (4.0 in) stroke. The LLR also corrected the head issue found in the L52. It produces 242 hp (180 kW) at 5600 rpm and 242 lb·ft (328 N·m) at 4600 rpm. Engine redline is 6300 rpm[WIKI]