<Tr> <Th> Width </Th> <Td> SRW: 79.7 in (2,024 mm) DRW: 96.1 in (2,441 mm) </Td> </Tr> <Tr> <Th> Height </Th> <Td> 76.0 - 77.4 in (1,930 - 1,966 mm) </Td> </Tr> <P> The HD variant is a heavy - duty light truck . It is a strengthened version of the Silverado / Sierra light - duty, and is available in the 1500HD, 2500HD, and 3500HD models . The 2500, introduced in 2000, offers a Vortec 6000 V8 with 300 hp (224 kW) at 5200 rpm and 360 lb ft (488 N m) of torque at 4000 rpm with a Hydra - Matic 4L80E four - speed automatic transmission . The 2500HD also offers either the LB7 Duramax V8 with 300 hp (224 kW) at 3100 rpm and 520 lb ft (705 N m) of torque at 1800 rpm, the LLY Duramax V8 with 310 hp (231 kW) @ 3000RPM and 605 lb ft (820 N m) @ 1600RPM, and the LBZ Duramax V8 with 360 hp (268 kW) @ 3200RPM and 650 lb ft (881 N m) @ 1600RPM . Also available is the Vortec 8100 V8 with 340 hp (254 kW) at 4200 rpm and 455 lb ft (617 N m) of torque at 3200 rpm . </P> <P> The 2500HD has an available five - speed (six - speed for 2006 - 2007 models) Allison 1000 transmission with the Vortec 8100 and Duramax 6.6 . The Silverado 3500 offers the same engine / transmission features that the 2500HD does, however it is usually equipped with "dually" twin wheels at the rear and has a stronger suspension . The HD models are primarily used for towing and high - weight cargo . The Chevrolet Silverado 2500HD came in at #2 in a 2016 study by iSeeCars.com ranking the top 10 longest - lasting vehicles . The Silverado 2500HD had 5.7% of vehicles over 200,000 miles, according to the iSeeCars study . </P>

What size engine is in a 2000 chevy silverado