Engines

Transmissions

Vortec 4.3L V-6
(LU3)

Vortec 4.8L V-8
(LY2)

Vortec 5.3L V-8
(LY5, LMG, LH6, LC9)

Vortec 6.0L
V-8
(L76)

Vortec 6.2L V-8 (L9H)

4-spd auto (Hydra-Matic 4L60)

6-spd auto (Hydra-Matic 6L80)

All cabs w/ Work Truck (1WT)

s 1

o 2

o
LY5 3
LM6/LC9 4
LH6 4

–

–

s

s 8

Crew Cab w/ 1LS

–

s

–

–

–

s

–

All cabs w/ 1LT

–

s 5

o
LY5 3
LM6/LC9 4
LH6 4

o 6

–

s

o

Ext. Cab & Crew Cab w/ LTZ (1LZ)

–

–

s
LY5 3
LMG/LC9 4
LH6 4

o 6

o 7

s

o 7

Standard

s

Optional

o

Not available

–

Models:

C/K 10753: Extended Cab Standard Box, 2WD & 4WD

C/K 10953: Extended Cab Long Box, 2WD & 4WD

C/K 10553: Extended Cab Short Box, 2WD & 4WD

Body style / driveline:

5/6-passenger Extended Cab, 1/2-ton, 2-and 4-wheel drive light-duty pickups available with 5-foot 8-inch, 6-foot 6-inch, and 8-foot (1.7 m, 2 m and 2.4 m) box

EPA vehicle class:

full-size truck

Manufacturing location:

Pontiac, Mich.; Oshawa, Ontario, Canada; Fort Wayne, Ind.

Key competitors:

Ford F-Series, Dodge Ram, Toyota Tundra, Nissan Titan

Vortec 4.3L V-6 (LU3)

Vortec 4.8L V-8 (LY2)

Vortec 5.3L V-8 FlexFuel (LMG)

Type:

4.3L V-6

4.8L V-8

5.3L V-8

Displacement (cu in / cc):

262 / 4300

293 / 4807

325 / 5328

Bore & stroke (in / mm):

4 x 3.48 / 101.6 x 88

3.78 x 3.27 / 96 x 83

3.78 x 3.62 / 96 x 92

Block material:

cast iron

cast iron

cast iron

Cylinder head material:

cast iron

cast aluminum

cast aluminum

Valvetrain:

OHV, 2 valves per cylinder

OHV, 2 valves per cylinder

OHV, 2 valves per cylinder

Ignition system:

direct composite distributor, platinum-tipped spark plugs, low-resistance spark plug wires

coil near plug, platinum-tipped spark plugs, low-resistance spark plug wires

coil near plug, platinum-tipped spark plugs, low-resistance spark plug wires

Fuel delivery:

sequential fuel injection

sequential fuel injection

Active Fuel Management; sequential fuel injection

Compression ratio:

9.2:1

9.1:1

9.9:1

Horsepower
(hp / kW @ rpm):

195 / 145 @ 4600*

295 / 220 @ 5600*

320 / 240 @ 5200*

Torque
(lb-ft / Nm @ rpm):

260 / 353 @ 2800*

305 / 414 @ 4600*

340 / 461 @ 4200*

Recommended fuel:

regular unleaded

regular unleaded

E85 and/or regular unleaded

Maximum engine speed (rpm):

5600

 6000

 6000

Emissions controls:

close-coupled catalytic converter, Quick Sync 58X ignition, returnless fuel rail, fast-response O² sensor

EPA estimated fuel economy (city / hwy):

2WD: 15 / 20

2WD: 14 / 19
4WD: 14 / 18

2WD: 14 / 20
4WD: 14 / 19

Vortec 5.3L V-8 (LY5)

Vortec 6.0L V-8 Vortec Max (L76)

Type:

5.3L V-8

6.0L V-8

Displacement
(cu in / cc):

325 / 5328

364 / 5967

B ore & stroke
(in / mm):

3.78 x 3.62 / 96 x 92

4 x 3.62 / 101.6 x 92

Block material:

cast iron

cast aluminum

Cylinder head material:

cast aluminum

cast aluminum

Valvetrain:

OHV, 2 valves per cylinder

OHV, 2 valves per cylinder, variable valve timing

Ignition system:

coil near plug, platinum-tipped spark plugs, low-resistance spark plug wires

coil near plug, platinum-tipped spark plugs, low-resistance spark plug wires

Fuel delivery:

Active Fuel Management; sequential fuel injection

Active Fuel Management; sequential fuel injection

Compression ratio:

9.9:1

9.6:1

Horsepower
(hp / kW @ rpm):

315 / 235 @ 5200*

367 / 274 @ 5600*

Torque
(lb-ft / Nm @ rpm):

338 / 458 @ 4400*

375 / 508 @ 4300*

Recommended fuel:

regular unleaded

regular unleaded

Maximum engine speed (rpm):

6000

6000

Emissions controls:

close-coupled catalytic converter, Quick Sync 58X ignition, returnless fuel rail, fast-response O² sensor

EPA estimated fuel economy (city / hwy):

2WD: 14 / 20
4WD: 14 / 19

2WD: 13 / 18
4WD: 13 / 17

Hydra-Matic 4L60

Hydra-Matic 6L80

Type:

4-speed automatic

6-speed automatic

Gear ratios (:1):

First:

3.06

4.03

Second:

1.63

2.36

Third:

1.00

1.53

Fourth:

0.70

1.15

Fifth:

—

0.85

Sixth:

—

0.67

Reverse:

2.29

3.06

Final drive ratio
(std. & avail.):

3.23, 3.42, 3.73 and 4.10

3.42

Front:

2WD & 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 & 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

Type:

power-assisted, 4-wheel disc, 4-wheel ABS; or power-assisted, front disc/rear drum, 4-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 / 330.2 x 30
rear: 13.5 x 0.79 / 342.9 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

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 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

Extended Cab, Standard Box

Extended Cab, Long Box

Wheelbase (in / mm):

143.5 / 3645

157.5 / 4001

Overall length (in / mm):

230.2 / 5844

249.2 / 6325

Overall width (in / mm):

79.9 / 2031

79.9 / 2031

Overall height (in / mm)

2WD:

73.9 / 1876

73.6 / 1870

4WD:

73.7 / 1872

73.6 / 1868

Track (in / mm)

Front:

68.1 / 1732

68.1 / 1732

Rear:

67 / 1702

67 / 1702

Min. running ground clearance

2WD:

8.9 / 226

9 / 230

4WD:

9 / 228

9.3 / 240

Ground to top of load floor
(in / mm):

2WD:

34.4 / 876

34.1 / 867

4WD:

34 / 864

33.6 / 854

Step-in height

2WD:

22.6 / 574

22.6 / 574

4WD:

22.6 / 574

22.6 / 574

Approach angle (deg)

2WD:

15.6

15.3

4WD:

15.8

15.5

Breakover angle (deg)

2WD:

18

19.6

4WD:

17.8

19.3

Departure angle (deg)

2WD:

22.8

24

4WD:

22

23.3

Extended Cab, Front

Extended Cab, Rear

Headroom (in / mm):

41.2 / 1048

39.2 / 997

Legroom (in / mm):

41.3 / 1049

34.33 / 872

Shoulder room (in / mm):

65.2 / 1657

65.3 / 1658

Hip room (in / mm):

62.5 / 1588

61.8 / 1570

GVWR (lb / kg)

Base Curb Weight (lb / kg)*

Max. 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

Extended Cab, Standard Box

Extended Cab, Long Box

Cargo volume (cu ft / L):

60.7 / 1718

75.5 / 2138

Length at floor (in / mm):

78.8 / 2003

97.7 / 2483

Width at floor (in / mm):

62.4 / 1586

62.4 / 1586

Width between wheelhousings (in / mm):

50.6 / 1286

50.6 / 1286

Tailgate width (in / mm):

61.5 / 1564

61.5 / 1564

Inside height (in / mm):

21 / 553

21 / 553

Extended Cab, Standard Box

Extended Cab, Long Box

Seating:

5 or 6

5 or 6

Fuel tank (gal / L):

26 / 98

34 / 128

Vortec
4.3L

Vortec
4.8L

Vortec
5.3L

Vortec
6.0L

Engine oil (qt / L):

4.5 / 4.3

6 / 5.7

6 / 5.7

6 / 5.7

Cooling system (qt / L):

12.6 / 11.9

13.4 / 12.7

14.9 / 14.1

14.4 / 13.6

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)