2009 GMC Sierra 2500HD Extended Cab - Curb Weight & Payload
  GVWR (lb / kg) Curb Weight (lb / kg) Payload (lb / kg)
2WD
Ext cab, std. box (2WD): 6.0L: 9200 / 4173
6.6L: 9200 / 4173
6.0L: 5577 / 2529
6.6L: 6286 / 2851
6.0L: 3623 / 1635
6.6L: 2914 / 1321
Ext cab, long box (2WD): 6.0L: 9200 / 4173
6.6L: 9200 / 4173
6.0L: 5719 / 2594
6.6L: 6427 / 2915
6.0L: 3481 / 1579
6.6L: 2773 / 1258
4WD
Ext cab, std. box (4WD): 6.0L: 9200 / 4173
6.6L:: 9200 / 4173
6.0L: 5840 / 2649
6.6L: 6567 / 2978
6.0L: 3360 / 1524
6.6L: 2633 / 1194
Ext cab, long box (4WD): 6.0L: 9200 / 4173
6.6L: 9200 / 4173
6.0L: 5978 / 2711
6.6L: 6694 / 3036
6.0L: 3222 / 1461
6.6L: 2506 / 1136

Chassis/Suspension
Front: all models: std long- and short-arm independent front torsion bar suspension
Rear: semi-elliptic two-stage multi-leaf spring
Steering type: integral power-assisted recirculating ball
Steering ratio: 24:01:00
Steering wheel turns, lock-to-lock: 3.14
Turning circle, curb-to-curb (ft / m)
Standard box 47.6 / 14.5 (2WD & 4WD)
Long box 52.5 / 16 (2WD & 4WD)
Brakes
Type: power-assisted, Hydroboost brake-apply system, 4-wheel disc, 4-wheel ABS
Rotor diameter x thickness (in / mm): front: 12.8 x 1.5 / 325 x 38
rear: 12.8 x 1.2 / 325 x 30
Total swept area (sq in / sq cm): front: 245.5 / 1584
rear: 235.1 / 1517
Wheels/Tires
Wheel size and type: 16-inch x 6.5-inch painted steel
16-inch x 6.5-inch chrome-styled steel
16-inch x 6.5-inch polished forged aluminum
17-inch x 7.5-inch bright machined aluminum
Tire size: LT245/75R16
LT265/75R17
Trailering
Trailer towing maximum with ball hitch (lb / kg):
Ext. cab, std. box: 2WD w/ 6.0L (4.10 axle): 12700 / 5761
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 12400 / 5625
4WD w/ 6.6L (3.73 axle): 13000 / 5897
Ext. cab, long box: 2WD w/ 6.0L (4.10 axle): 12500 / 5670
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 12300 / 5579
4WD w/ 6.6L (3.73 axle): 13000 / 5897
*SAE certified.