2014 GMC SIERRA HD

ENGINES

Vortec 6.0L V8 (L96 / LC8)
Displacement (cu in / cc) - 364 / 5967
Bore & stroke (in / mm) - 4.00 x 3.62 / 101.6 x 92
Block material - cast iron
Cylinder head material - cast aluminium
Valvetrain - overhead valve, two valves per cylinder, variable valve timing
Ignition system - coil-near-plug, platinum- tipped spark plugs, low-resistance spark plug wires
Fuel delivery - sequential fuel injection
Compression ratio - 9.6:1
Horsepower (hp / kW @ rpm) - 360 / 268 @ 5400  (L96 / LC8 w/ gas) - 301 / 225 @ 5000 (LC8 w/ CNG)
Torque (lb-ft / Nm @ rpm) - 380 / 515 @ 4200 (L96 / LC8 w/ gas) - 333 / 452 @ 4200 (LC8 w/ CNG)
Recommended fuel - regular unleaded (L96) - regular unleaded or CNG (LC8)
Maximum engine speed (rpm) - 6000
Emissions controls - three-way catalytic converter, positive crankcase ventilation, evaporative collection system

Duramax 6.6L Turbo Diesel V8 (LML)
Displacement (cu in / cc) - 403 / 6599
Bore & stroke (in / mm) - 4.05 x 3.89 / 103 x 99
Block material - cast iron
Cylinder head material - cast aluminium
Valvetrain - overhead valve, four valves per cylinder
Ignition system - compression, glow plug start aid
Fuel delivery - direct injection diesel with high pressure common rail
Compression ratio - 16.0:1
Horsepower (hp / kW @ rpm) - 397 / 296 @ 3000
Torque (lb-ft / Nm @ rpm) - 765 / 1037 @ 1600
Recommended fuel - diesel or B20
Maximum engine speed (rpm) - 3000
Emissions controls - cooled exhaust gas recirculation (EGR), EGR cooling-bypass system, diesel particulate filter system (DPF), selective catalyst reduction (SCR)

TRANSMISSIONS

Hydra-Matic 6L90 six-speed automatic (with Vortec 6.0L)
Gear ratios:
First - 4.03
Second - 2.36
Third - 1.53
Fourth - 1.15
Fifth - 0.85
Sixth - 0.67
Reverse - 3.06
Final drive ratio - 4.10 or 3.73

Allison 1000 six-speed automatic (with Duramax 6.6L)
Gear Ratios:
First - 3.10
Second - 1.81
Third - 1.41
Fourth - 1.00
Fifth - 0.71
Sixth - 0.61
Reverse - 4.49
Final drive ratio - 3.73

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 - 16.1
Steering wheel turns, lock-to-lock - 3.57

TURNING CIRCLE
Turning circle, curb-to-curb (ft / m):
Regular Cab, std. box - 44.9 / 13.7
Crew Cab, std. box - 50.5 / 15.4
Crew Cab, long box - 54.8 / 16.7

BRAKES
Type - power-assisted, Hydroboost brake-apply system, four-wheel disc, four-wheel ABS
Rotor diameter x thickness  (in / mm):
Front - 13.80 x 1.57 / 350 x 40
Rear - 14.17 x 1.34 / 360 x 34
Total swept area (sq in / sq cm):
Front - 277.6 / 1791
Rear - 282 / 1819

WHEELS / TYRES
Wheel size and type:
17x7.5-in steel
17x7.5-in chrome-clad steel
17x7.5-in machined aluminium
18x8.0-in steel
18x8.0-in polished aluminium
20x8.5-in polished aluminium
Tyre size:
LT245/75R17 all season blackwall
LT265/70R17 all terrain blackwall
LT265/70R18 all season blackwall
LT265/70R18 all terrain blackwall
LT265/60R20 all terrain blackwall

DIMENSIONS

EXTERIOR
Wheelbase (in / mm):
Regular Cab Long Box - 133.7 / 3369
Crew Cab Standard Box - 153.7 / 3904
Crew Cab Long Box - 167.7 / 4260
Overall length (in / mm):
Regular Cab Long Box - 225 / 5715
Crew Cab Standard Box - 240.2 / 6101
Crew Cab Long Box - 259.1 / 6581
Overall width (in / mm):
Regular Cab Long Box - 80 / 2032 
Crew Cab Standard Box - 80 / 2032
Crew Cab Long Box - 80 / 2032
Overall height (in / mm):
Regular Cab Long Box - 77.6 / 1971
Crew Cab Standard Box - 78.3 / 1958
Crew Cab Long Box - 78.1 / 1984
Track – front (in / mm):
Regular Cab Long Box - 68.8 / 1748
Crew Cab Standard Box - 68.8 / 1748
Crew Cab Long Box - 68.8 / 1748
Track – rear (in / mm):
Regular Cab Long Box - 67.3 / 1709
Crew Cab Standard Box - 67.3 / 1709
Crew Cab Long Box - 67.3 / 1709
Min. ground clearance – 2WD (in / mm):
Regular Cab Long Box - front: 9.8 / 249, rear: 9.1 / 231
Crew Cab Standard Box - front: 9.8 / 249, rear: 8.4 / 213
Crew Cab Long Box - front: 9.8 / 249, rear: 8.3 / 211
Min. ground clearance – 4WD (in / mm):
Regular Cab Long Box - front: 9.75 / 248, rear: 9.1 / 231
Crew Cab Standard Box - front: 9.75 / 248, rear: 8.2 / 208
Crew Cab Long Box - front: 9.75 / 248, rear: 8.2 / 208
Step-in height (in / mm):
Regular Cab Long Box - 26.3 / 668
Crew Cab Standard Box - 26 / 661
Crew Cab Long Box - 25.9 / 658

WEIGHT & PAYLOAD RATINGS

Regular cab, long box (2WD):
GVWR (lb / kg) - 6.0L: 10000 / 4536*, 6.6L: 9900 / 4491
Curb Weight (lb / kg) - 6.0L: 5788 / 2625*, 6.6L: 6469 / 2934
Payload (lb / kg) - 6.0L: 4212 / 1910*, 6.6L: 3431 / 1556
*with UB7 Performance Package

Regular cab, long box (4WD):
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 9900 / 4491
Curb Weight (lb / kg) - 6.0L: 5962 / 2704, 6.6L: 6821 / 3094
Payload (lb / kg) - 6.0L: 3538 / 1605, 6.6L: 3079 / 1396

Crew cab, std. box (2WD):
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6153 / 2791, 6.6L: 6963 / 3158
Payload (lb / kg) - 6.0L: 3347 / 1518, 6.6L: 3037 / 1377

Crew cab, std. box (4WD):
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6434 / 2918, 6.6L: 7294 / 3308
Payload (lb / kg) - 6.0L: 3066 / 1391, 6.6L: 2706 / 1227

Crew cab, long box (2WD):
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6253 / 2836, 6.6L: 7068 / 3206
Payload (lb / kg) - 6.0L: 3247 / 1473, 6.6L: 2932 / 1330

Crew cab, long box (4WD):
GVWR (lb / kg) - 6.0L: 9900 / 4490, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6595 / 2991, 6.6L: 7448 / 3378
Payload (lb / kg) - 6.0L: 3305 / 1499, 6.6L: 2552 / 1157

Denali (2WD):
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6307 / 2860, 6.6L: 7129 / 3233
Payload (lb / kg) - 6.0L: 3193 / 1448, 6.6L: 2871 / 1302

Denali (4WD): 
GVWR (lb / kg) - 6.0L: 9500 / 4309, 6.6L: 10000 / 4536
Curb Weight (lb / kg) - 6.0L: 6601 / 2994, 6.6L: 7456 / 3382
Payload (lb / kg) - 6.0L: 2899 / 1315, 6.6L: 2545 / 1154

CARGO BOX
Cargo volume (cu ft / L):
Standard Box - 60.7 / 1718 
Long Box - 75.5 / 2138
Length at floor (in / mm):
Standard Box - 78.8 / 2003
Long Box - 97.8 / 2484
Width at floor (in / mm): 
Standard Box - 62.4 / 1586
Long Box - 62.4 / 1586
Tailgate width (in / mm):
Standard Box - 61.6 / 1564
Long Box - 61.6 / 1564
Width between wheel housings (in / mm):
Standard Box - 50.6 / 1286
Long Box - 50.6 / 1286
Inside height (in / mm):
Standard Box - 21 / 533
Long Box - 21 / 533

INTERIOR
Headroom (in / mm):
Regular Cab - 41.3 / 1049
Crew Cab - front: 41.3 / 1049, rear: 40.6 / 1031
Legroom (in / mm):
Regular Cab - 41.3 / 1049
Crew Cab - front: 41.3 / 1049, rear: 39 / 991
Shoulder room (in / mm):
Regular Cab - 65.2 / 1657
Crew Cab - front: 65.2 / 1657, rear: 65.2 / 1656
Hip room (in / mm):
Regular Cab - 60.3 / 1532
Crew Cab - front: 60.3 / 1532, rear: 65.5 / 1664

TRAILERING

Trailer towing maximum with ball hitch (lb / kg)

Regular cab, long box:
2WD w/ 6.0L (4.10 axle): 13000 / 5897
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 13000 / 5897
4WD w/ 6.6L (3.73 axle): 13000 / 5897

Crew cab, std. box:
2WD w/ 6.0L (4.10 axle): 13000 / 5897
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 13000 / 5897
4WD w/ 6.6L (3.73 axle): 13000 / 5897

Crew cab, long box:
2WD w/ 6.0L (4.10 axle): 13000 / 5897
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 13000 / 5897
4WD w/ 6.6L (3.73 axle): 13000 / 5897

Denali: 
2WD w/ 6.0L (4.10 axle): 13000 / 5897
2WD w/ 6.6L (3.73 axle): 13000 / 5897
4WD w/ 6.0L (4.10 axle): 13000 / 5897
4WD w/ 6.6L (3.73 axle): 13000 / 5897

Trailer towing maximum with fifth-wheel hitch (lb / kg)

Regular cab, long box:
2WD w/ 6.0L (4.10 axle): 14700 / 6668
2WD w/ 6.6L (3.73 axle): 17800 / 8074
4WD w/ 6.0L (4.10 axle): 14400 / 6531
4WD w/ 6.6L (3.73 axle): 17500 / 7938

Crew cab, std. box:
2WD w/ 6.0L (4.10 axle): 14200 / 6441
2WD w/ 6.6L (3.73 axle): 17400 / 7892
4WD w/ 6.0L (4.10 axle): 13900 / 6305
4WD w/ 6.6L (3.73 axle): 15800 / 7167

Crew cab, long box:
2WD w/ 6.0L (4.10 axle): 14100 / 6395
2WD w/ 6.6L (3.73 axle): 16700 / 7575
4WD w/ 6.0L (4.10 axle): 13800 / 6260
4WD w/ 6.6L (3.73 axle): 14700 / 6668

Denali: 
2WD w/ 6.0L (4.10 axle): 14000 / 6350
2WD w/ 6.6L (3.73 axle): 16500 / 7484
4WD w/ 6.0L (4.10 axle): 13700 / 6214
4WD w/ 6.6L (3.73 axle): 14700 / 6668

CAPACITIES
Seating:
Regular Cab - 2 / 3
Crew Cab - 5 / 6
Fuel tank – 2WD and 4WD (gal / L): 
Regular Cab - 36 / 136
Crew Cab - 36 / 136