2009 GMC Sierra Light-Duty Extended Cab - Curb Weight & Payload
  GVWR (lb / kg) Base Curb Weight (lb / kg)* Payload (lb / kg)* Weight Distribution (% front / rear)
2WD
Ext. Cab Standard Box: 6400 / 2903 5068 / 2299 1732 / 785 58 / 42
Ext. Cab Long Box: 6900 / 3130 5244 / 2378 1656 / 751 59 / 41
4WD
Ext. Cab Standard Box: 7000 / 3175 5309 / 2408 1691 / 767 59 / 41
Ext. Cab Long Box: 7000 / 3175 5504 / 2496 1496 / 678 60 / 40
*5.3L w/ 6-spd transmission


Chassis/Suspension
Front: 2WD and 4WD: independent coil-over-shock; monotube shock absorbers
Rear: solid axle with semi-elliptic, variable-rate, two-stage multileaf springs; splayed shock absorbers; monotube shocks
Steering type: power-assisted rack-and-pinion (2WD and 4WD)
Steering ratio: 16.73:1
Steering wheel turns, lock-to-lock: 3
Turning circle, curb-to-curb (ft / m)
2WD/4WD Ext. Cab Short Box: 44.6 / 13.6
2WD/4WD Ext. Cab Standard Box: 46.9 / 14.3
2WD/4WD Ext. Cab Long Box: 51.2 / 15.6
Brakes
Type: power-assisted, four-wheel disc, four-wheel ABS; or power-assisted, front disc/rear drum, four-wheel ABS
Rotor diameter x thickness (in / mm) disc/drum brakes: front: 12.99 x 1.18 / 330 x 30
rear:11.61 x 2.36 / 295 x 60
with 4-wheel disc: front: 13 x 1.18 / 330 x 30
rear: 13.5 x 0.79 / 343 x 20
Total swept area (sq in / sq cm)
with disc/drum brakes: front: 301.2 / 1944
rear:172.4 / 1112
with 4-wheel disc: front: 257 / 1656
rear:113 / 732
Wheels/Tires
Wheel size & type: 17 x 7.5-in steel
17 x 7.5-in chrome-style steel
17 x 7.5-in polished cast aluminum
18 x 8-in chrome-clad aluminum
20 x 8.5-in chrome-clad aluminum
Tires: P24570R17 all season, blackwall or white letter
P265/70R17 AL2, blackwall or white letter
P265/70R17 on/off road, blackwall or white letter
P265/65R18 all season, blackwall or white letter
P275/55R20 AL2 touring blackwall
Trailering
Trailer towing maximum with ball hitch (lb / kg):
Ext. Cab, Std. Box: 2WD:9700 / 4400 (5.3L w/ HD cooling, 6-spd and 3.42 axle OR 6.0L w/ HD cooling, 6-spd and 3.42 axle)
4WD:9400 / 4264 (5.3L w/ HD cooling, 6-spd and 3.42 axle OR 6.0L w/ HD cooling, 6-spd and 3.42 axle)
Ext. Cab., Std. Box (w/ enhanced trailering pkg.): 2WD: 10700 / 4853 (6.0L w/ 3.73 axle)
4WD:10400 / 4717 (6.0L w/ 3.73 axle)
Ext. Cab, Long Box: 2WD:9500 / 4309 (5.3L w/ HD cooling, 6-spd and 3.42 axle)
4WD: 9200 / 4173 (5.3L w/ HD cooling, 6-spd and 3.42 axle)
* SAE certified.