1999-2006 GMC Sierra Specs & Safety - Consumer Guide Automotive

Detailed safety information for this generation GMC Sierra include detailed crash test scores from the NHTSA. Specs for this generation GMC Sierrainclude everything from fuel mileage to seating capacity to options availability.

1999-2006 GMC Sierra Specs & Safety

Vehicle Dimensions

Specification	ext. cab long bed	ext. cab short bed	reg. cab long bed	reg. cab short bed

Wheelbase, in.	157.5	143.5	133.0	119.0

Overall Length, in.	246.6	227.5	222.1	203.2

Overall Width, in.	78.5	78.5	78.5	78.5

Overall Height, in.	70.8	71.2	71.0	71.2

Curb Weight, lbs.	4511	4289	4066	3956

Cargo Volume, cu. ft.	--	--	--	--

Standard Payload, lbs.	--	--	--	--

Fuel Capacity, gals.	34.0	26.0	34.0	26.0

Seating Capacity	6	6	3	3

Front Head Room, in.	41.0	41.0	41.0	41.0

Max. Front Leg Room, in.	41.0	41.0	41.3	41.3

Rear Head Room, in.	38.4	38.4	--	--

Max. Rear Leg Room, in.	33.7	33.7	--	--

Specifications Key: NA = not available; "--" = measurement does not exist.

Powertrain Options and Availability

Sierras had a standard 200-horsepower 4.3-liter V6. Two V8s were optional: 4.8 and 5.3 liters. Either a 5-speed manual or 4-speed automatic transmission could be installed, but the 5.3-liter V8 was automatic-only. For 2000, the 4.8-liter V8 grew from 255 to 270 horsepower, while the 5.3-liter increased from 270 to 285 hp. GMC introduced a 325-horsepower, 6.0-liter V8 for 2001, in the new performance-focused C3 pickup. Joining the 295-hp 5.3 for '05 is a high-output version with 310 hp available on short-bed 4WD extendeds. Denali uses a 6.0 with 345 hp, a 20 hp increase from 2004.

Engines	Size liters / cu. in	Horse- power	Torque	Transmission: EPA city/hgwy	Consumer Guide Observed

ohv V6	4.3 / 262	200	260	5-speed manual: 17/23 4-speed automatic: 16/20	5-speed manual: -- 4-speed automatic: --

ohv V8	4.8 / 294	255-270	285	5-speed manual: 16/20 4-speed automatic: 16/21	5-speed manual: -- 4-speed automatic: --

ohv V8	5.3 / 325	270-310	315-325	4-speed automatic: 16/20	4-speed automatic: 12.6

ohv V8	6.0 / 364	300-345	360-370	4-speed automatic: 11/14	4-speed automatic: --

Specifications Key: NA = not available; "--" = measurement does not exist.

NHTSA Crash-Test Results

Test	1999 Sierra 1500

Front Impact, Driver	3

Front Impact, Passenger	4

The National Highway Traffic Safety Administration (NHTSA) tests a vehicle's worthiness in front- and side-impact collisions and rates its resistance to rollovers. Front-impact crash-test numbers indicate the chance of serious injury: 5 = 10% or less; 4 = 10-20%; 3 = 20-35%; 2 = 35-45%; 1 = More than 45%. Side-impact crash-test numbers indicate: 5 = 5% or less; 4 = 6-10%; 3 = 11-20%; 2 = 21-25%; 1 = More than 26%. Rollover resistance numbers indicate the chance for rollover when the vehicle leaves the roadway: 5 = Less than 10%; 4 = 10-20%; 3 = 20-30%; 2 = 30-40%; 1 = More than 40%.

Built In: Canada

Drive Wheels: longitudinal front-engine/rear- or 4-wheel drive

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