Fuel Economy

Engines	EPA Estimated MPG city/hwy.
Vortec 5.3L V8 (half-ton models only)
2WD1	15/21
4x41	15/20
Vortec 6.0L V8 (half-ton models only)
2WD	14/19
4x4	14/18

1. Suburban equipped with the Vortec 5.3L V8 FlexFuel engine gets an EPA estimated MPG 12 city, 16 highway on 2WD models and 11 city, 15 highway on 4x4 models when running on E85 fuel.

Dimensions

	Exterior (inches)
Wheelbase	130.0
Length	222.4
Height (with luggage rack)
2WD	76.8
4x4	76.8
Width	79.1
Ground to rear load floor (liftover height)
2WD	31.8
4x4	32.6

	Clearances (inches)
Ground clearance (min.)
2WD, front	10.5
2WD, rear	9.1
4x4, front	10.5
4x4, rear	9.1

	Interior (inches)
	Front	Middle	Rear
Headroom	41.1	38.5	38.1
Legroom	41.3	39.5	34.9
Shoulder room	65.3	65.2	64.7
Hip room	64.4	61.8	49.4

Capacities

	Capacity
Seating	6–9
Fuel (approx. gal.)
Half-ton	31
Three-quarter-ton	39
Cargo (cu. ft.)
Behind first row (third row removed, second row folded)	137.4
Behind second row (third row removed)	90.0
Behind third row	45.8
GVWR, standard (lbs.)1
Half-ton
2WD	7,200
4x4	7,400
Three-quarter-ton
2WD	8,600
4x4	8,600
Payload, base (lbs.)2
Half-ton
2WD	1,593
4x4	1,657
Three-quarter-ton
2WD	2,561
4x4	2,273
Curb weights, estimated (lbs.)
Half-ton
2WD	5,607
4x4	5,743
Three-quarter-ton
2WD	6,039
4x4	6,327

1. Gross Vehicle Weight Rating (GVWR). When properly equipped; includes weight of vehicle, driver, passengers, optional equipment, and cargo.
2. Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo.

Trailering

	Vortec 5.3L V8 (Automatic)
MODEL	Max. Trailer Weight (lbs.)1	Required Axle Ratio
Half-ton (2WD)	7,100	3.73
	8,100	4.10
Half-ton (4x4)	7,000	3.73
	8,000	4.10

	Vortec 6.0L V8 (Automatic)
MODEL	Max. Trailer Weight (lbs.)1	Required Axle Ratio
Half-ton (2WD)	8,200	4.10
Half-ton (4x4)	8,000	4.10

Trailering

	Vortec 6.0L V8 (Automatic)
MODEL	Max. Trailer Weight (lbs.)1	Required Axle Ratio
Three-quarter-ton (2WD)	7,700	3.73
	9,700	4.10
Three-quarter-ton (4x4)	7,400	3.73
	9,400	4.10

1. Maximum trailer weight ratings are calculated assuming a base vehicle, except for any option(s) necessary to achieve the rating, plus driver. The weight of other optional equipment, passengers and cargo will reduce the maximum trailer weight your vehicle can tow. See your Chevy dealer for additional details. NOTES: Trailer tongue weight should be 10 to 15 percent of total loaded trailer weight (up to 1,000 lbs.). Addition of trailer tongue weight cannot cause vehicle weights to exceed Rear Gross Axle Weight Rating (RGAWR) or Gross Vehicle Weight Rating (GVWR). These ratings can be found on the certification label located on the driver door or door frame. For recreational towing restrictions and availability, consult the Owner’s Manual.

Braking

	U.S. Standard
Type (power)	Four-wheel disc
Antilock system	Standard four-wheel

Engine

	Vortec 5.3L V8	Vortec 5.3L V8 FlexFuel	Vortec 5.3L V8 FlexFuel	Vortec 6.0L V8	Vortec 6.0L V8
RPO	LY5	LMG	LC9	L76	LY6
Availability	Standard in half-ton 2WD	Available in half-ton 2WD	Standard in half-ton 4x4	Available in all half-ton	Standard in all three-quarter ton
Displacement (cu. in.)	325	325	325	366	366
Cylinder-block material	cast-iron	cast-iron	cast-aluminum	cast-aluminum	cast-iron
Cylinder-head material	cast-aluminum	cast-aluminum	cast-aluminum	cast-aluminum	cast-aluminum
Valvetrain configuration	OHV	OHV	OHV	OHV	OHV
Valves per cylinder	2	2	2	2	2
Ignition	direct, coil-near-plug	direct, coil-near-plug	direct, coil-near-plug	direct, coil-near-plug	direct, coil-near-plug
Lifters	hydraulic roller	hydraulic roller	hydraulic roller	hydraulic roller	hydraulic roller
Cam drive	chain	chain	chain	chain	chain
Alternator rating (amps)	160	160	160	160	145
Battery (SAE rating, cca)	600	600	600	600	600
Recommended unleaded fuel	87 octane	87 octane	87 octane	87 octane	87 octane
Horsepower @ RPM	320 @ 5200	320 @ 5200	310 @ 5200	366 @ 5500	352 @ 5400
Torque (lb.-ft.) @ RPM	340 @ 4200	340 @ 4200	335 @ 4400	380 @ 4300	383 @ 4300

Steering

	Half-ton	Three-quarter-ton
Type (power)	rack-and-pinion	recirculating ball

Transmission

	Half-ton	Three-quarter-ton
Type	Hydra-Matic four-speed automatic	Hydra-Matic four-speed heavy-duty automatic
RPO	M30 (4L60-E)	M70 (4L70-E HD)
First gear	3.06	3.06
Second gear	1.63	1.63
Third gear	1.00	1.00
Fourth gear	0.70	0.70
Reverse gear	2.29	2.29
Case material	cast-aluminum	cast-aluminum