Truck Trend is the source for official specifications, payload, towing capacity, and other information that matters to real truck users. Check out the latest info for the 2009 GMC Sierra 2500HD Extended Cab with standard box, long box, 2WD & 4WD options. Read the complete specs on the Vortec 6.0L V-8 and Duramax 6.6L V-8 power plants.


2009 GMC Sierra 2500HD Extended Cab
Models: 2500HD ext. cab, std box, 2WD & 4WD
2500HD ext. cab, long box, 2WD & 4WD
Body style / driveline: 5-6 passenger extended cab, 3/4-ton; two- and four-wheel-drive heavy duty pickup
Construction: body on frame
EPA vehicle class: full-size truck
Manufacturing location: Pontiac, Mich.; Flint, Mich.
Engines
  Vortec 6.0L V-8 (LY6) Duramax 6.6L V-8 (LMM)
Type: 6.0L V-8 6.6L V-8
Displacement (cu in / cc): 364 / 5967 403 / 6599
Bore & stroke (in / mm): 4.00 x 3.62 / 101.6 x 92 4.06 x 3.9 / 103 x 99
Block material: cast iron cast iron
Cylinder head material: cast aluminum cast aluminum
Valvetrain: OHV OHV
Ignition system: coil-near-plug, platinum- tipped spark plugs, low-resistance spark plug wires compression, glow plug start aid; low-resistance spark plug wires
Fuel delivery: sequential fuel injection direct injection diesel with high pressure common rail
Compression ratio: 9.6:1 16.8:1
Horsepower (hp / kW @ rpm): 360 / 268 @ 5400* 365 / 272 @ 3200
Torque (lb-ft / Nm @ rpm): 380 / 515 @ 4200* 660 / 895 @ 1600
Recommended fuel: regular unleaded diesel
Maximum engine speed (rpm): 6000 3450
Emissions controls: three-way catalytic converter, positive crankcase ventilation, evaporative collection system turbocharged, intercooled, catalytic converter system; diesel particulate filter system with regeneration
Transmissions
  Hydra-Matic 6L90 Allison 1000
Type: six-speed automatic (w/ Vortec 6.0L) six-speed automatic (w/ Duramax 6.6L)
Gear ratios (:1):
First: 4.03 3.1
Second: 2.36 1.81
Third: 1.53 1.41
Fourth: 1.15 1
Fifth: 0.85 0.71
Sixth: 0.67 0.61
Reverse: 3.06 4.49
Final drive ratio (std. & avail.): Vortec 6.0L 3.73 or 4.10
Duramax 6.6L: 3.73


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


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.

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