2009 GMC Sierra 2500HD Extended Cab - Dimensions
Dimensions - Exterior
  Extended Cab Standard Box Extended Cab Long Box
Wheelbase (in / mm): 143.5 / 3645 157.5 / 4001
Overall length (in / mm): 230.3 / 5850 249.2 / 6330
Overall width (in / mm): 80 / 2032 95.9 / 2436
Overall height: (in / mm): 76.8 / 1951 76 / 1930
Track - front (in / mm): 68.6 / 1744 68.6 / 1744
Track - rear (in / mm): 66 / 1676 66 / 1676
Minimum ground clearance (in / mm): 2WD: 9.5 / 243
4WD: 9.5 / 243
2WD: 9.5 / 243
4WD: 9.5 / 243
Step-in height (in / mm): 25.2 / 640 25.2 / 640
Cargo box - Dimensions
  Standard Box Long Box
Cargo volume (cu ft / L): 60.7 / 1718 75.5 / 2138
Length at floor (in / mm): 78.7 / 1999 97.6 / 2479
Width at floor (in / mm): 62.4 / 1586 62.4 / 1586
Tailgate width (in / mm): 61.5 / 1564 61.5 / 1564
Width between wheel housings (in / mm): 50.6 / 1286 50.6 / 1286
Inside height (in / mm): 21 / 553 21 / 553
Interior - Dimensions
  Extended Cab
Headroom (in / mm): front: 41.2 / 1048
rear: 39.2 / 998
Legroom (in / mm): front: 41.3 / 1049
rear: 34.33 / 872
Shoulder room (in / mm): front: 65.2 / 1657
rear: 65.3 / 1658
Hip room (in / mm): front:: 62.5 / 1588
rear: 61.8 / 1570
Capacities
  Extended Cab
Seating: 5/6
Fuel tank (gal / L): 26 / 98 (std box)
34 / 129 (long box)
Engine oil (qt / L): 6.0L: 6.0 / 5.7
6.6L: 10 / 9.5
Cooling system (qt / L): 6.0L: 16.4 / 15.5
6.6L: 25.4 / 24