2003 · Full-Size Pickup · Gas / Flex-fuel

2003 GMC Sierra MPG & fuel economy

The 2003 GMC Sierra is a full-size pickup offered in 13 EPA-rated configurations. The most efficient version returns 16 MPG combined (14 city / 19 highway) on regular gasoline. Across the lineup, combined ratings range from 13 to 16 MPG. Efficiency is unchanged from the 2002 model. Among 13 full-size pickups rated for 2003, it ranks 7th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,906 a year to fuel.

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Combined 16 MPG 14 MPG city · 19 MPG hwy
Driving range — not published for this model
Your fuel cost $2,906 15,000 mi/yr · $19.38 per 100 mi
Class rank, 2003 #7 of 13 Full-Size Pickups by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Fuel average

The 2003 GMC Sierra's fuel average is 6.8 km/L (14.7 L/100 km), or 16 MPG combined: 6.0 km/L in the city and 8.1 km/L on the highway.

MPGkm/LL/100 km
City146.016.8
Highway198.112.4
Combined166.814.7

How it ranks among 2003 Full-Size Pickups

Full class ranking →
  1. 1Ford Ranger23 MPG $2,022
  2. 2Mazda B Pickup23 MPG $2,022
  3. 3Toyota Tacoma22 MPG $2,114
  4. 4Nissan Frontier21 MPG $2,214
  5. 5Dodge Dakota Pickup17 MPG $2,735
  6. 7GMC Sierra16 MPG $2,906
  7. 13Lincoln Blackwood13 MPG $4,558
2003 SierraOther full-size pickupsClass median: $2,906/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

Sierra MPG across model years

Full history →

13 EPA-rated configurations

ConfigurationTypeCityHwyCombinedRangeYour cost / yr
RWD · 4.3L 6-cyl · 4-speed automatic
Sierra 1500 2WD		 Gas 14 MPG 19 MPG 16 MPG — $2,906
RWD · 4.3L 6-cyl · 5-speed manual
Sierra 1500 2WD		 Gas 14 MPG 19 MPG 16 MPG — $2,906
RWD · 4.8L 8-cyl · 5-speed manual
Sierra 1500 2WD		 Gas 14 MPG 19 MPG 16 MPG — $2,906
RWD · 4.8L 8-cyl · 4-speed automatic
Sierra 1500 2WD		 Gas 14 MPG 18 MPG 15 MPG — $3,100
RWD · 5.3L 8-cyl · 4-speed automatic
Sierra 1500 2WD		 Gas 13 MPG 17 MPG 15 MPG — $3,100
4WD/AWD · 4.3L 6-cyl · 4-speed automatic
Sierra 1500 4WD		 Gas 13 MPG 17 MPG 15 MPG — $3,100
RWD · 5.3L 8-cyl · 4-speed automatic
Sierra 1500 2WD		 Flex-fuel 13 MPG 18 MPG 15 MPG — $3,100
4WD/AWD · 4.3L 6-cyl · 5-speed manual
Sierra 1500 4WD		 Gas 13 MPG 17 MPG 14 MPG — $3,321
4WD/AWD · 4.8L 8-cyl · 4-speed automatic
Sierra 1500 4WD		 Gas 13 MPG 16 MPG 14 MPG — $3,321
4WD/AWD · 4.8L 8-cyl · 5-speed manual
Sierra 1500 4WD		 Gas 13 MPG 16 MPG 14 MPG — $3,321
4WD/AWD · 5.3L 8-cyl · 4-speed automatic
Sierra 1500 4WD		 Gas 13 MPG 16 MPG 14 MPG — $3,321
4WD/AWD · 5.3L 8-cyl · 4-speed automatic
Sierra 1500 4WD		 Flex-fuel 12 MPG 16 MPG 14 MPG — $3,321
4WD/AWD · 6.0L 8-cyl · 4-speed automatic
Sierra Denali 1500 AWD		 Gas 11 MPG 15 MPG 13 MPG — $3,577

Specs (most efficient configuration)

Fuel
Regular gasoline
Engine / motor
4.3L 6-cyl
Transmission
4-speed automatic
Drivetrain
RWD
Tailpipe CO₂
555 g/mi

2003 GMC Sierra vs. rivals

vs Ford F150 16 MPG · $2,906/yr Same fuel cost vs Dodge Ram 1500 Pickup 16 MPG · $2,906/yr Same fuel cost vs Chevrolet Silverado 16 MPG · $2,906/yr Same fuel cost vs Toyota Tundra 16 MPG · $2,906/yr Same fuel cost vs Dodge Dakota Pickup 17 MPG · $2,735/yr Dakota Pickup saves $171/yr vs Chevrolet SSR Pickup 15 MPG · $3,100/yr Sierra saves $194/yr vs Ford F150 CNG 13 MPGe · $3,346/yr Sierra saves $440/yr vs Nissan Frontier 21 MPG · $2,214/yr Frontier saves $692/yr vs Toyota Tacoma 22 MPG · $2,114/yr Tacoma saves $793/yr vs Ford Ranger 23 MPG · $2,022/yr Ranger saves $885/yr vs Mazda B Pickup 23 MPG · $2,022/yr B Pickup saves $885/yr vs Lincoln Blackwood 13 MPG · $4,558/yr Sierra saves $1,651/yr

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Frequently asked questions

What is the gas mileage of the 2003 GMC Sierra?

Up to 16 MPG combined (14 city / 19 highway); ratings range from 13 to 16 MPG depending on configuration.

What fuel does the 2003 GMC Sierra use?

Regular gasoline.

What is the fuel average in km/L for the 2003 GMC Sierra?

The 2003 GMC Sierra's fuel average is 6.8 km/L (14.7 L/100 km), or 16 MPG combined: 6.0 km/L in the city and 8.1 km/L on the highway.

How much does it cost to fuel the 2003 GMC Sierra per year?

About $2,906 at 15,000 miles a year with $3.10/gal regular gas, or $19.38 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.

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