2003 GMC Sierra

US · Pickup · Standard Pickup Trucks 2WD

The 2003 GMC Sierra is listed in the US market as a pickup. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.

Engine: Varies by configuration: 4.3L 6-cylinder, 4.8L 8-cylinder, 5.3L 8-cylinder (LM7), 5.3L 8-cylinder (FLEX-FUEL), 6.0L 8-cylinder
Power: Not available
Torque: Not available
Transmission: Varies by configuration: Automatic, Manual
Drivetrain: Varies by configuration: RWD, AWD
Fuel: Varies by configuration: Gasoline, Flex fuel
Seating: Not available

Generic outline. Published dimensions for this vehicle are not available.

Specifications at a Glance

Key Performance & Dimensions

Units:

Engine / Powertrain

GASOLINE

Power Output

Not available

Peak Torque

Not available

Combined Economy

Not available

Drivetrain

Not available

Transmission

Not available

Capacity

Not available

Exterior Dimensions

Not available

Market: US·Switch units anytime to convert horsepower, torque, fuel economy, and dimensions.

Compare 2003 GMC Sierra ↗

Engine

Engine
Specification	Value	Source
Engine	Varies by configuration: 4.3L 6-cylinder, 4.8L 8-cylinder, 5.3L 8-cylinder (LM7), 5.3L 8-cylinder (FLEX-FUEL), 6.0L 8-cylinder
Displacement	4.3 L to 6.0 L
Cylinders	6 to 8
Fuel type	Varies by configuration: Gasoline, Flex fuel	EPA fueleconomy.gov

Not available from our sources: Aspiration, Power, Torque.

Transmission and drivetrain

Transmission and drivetrain
Specification	Value	Source
Transmission	Varies by configuration: Automatic, Manual
Gears	4 to 5
Drivetrain	Varies by configuration: RWD, AWD

Fuel economy and range

Fuel economy and range
Specification	Value	Source
Combined	16 mpg (14.7 L/100 km) to 13 mpg (18.1 L/100 km)	EPA fueleconomy.gov
City	14 mpg (16.8 L/100 km) to 11 mpg (21.4 L/100 km)
Highway	19 mpg (12.4 L/100 km) to 15 mpg (15.7 L/100 km)

Not available from our sources: Electric range, Battery capacity.

Trims and configurations

13 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.

Recalls

NHTSA lists 9 recall campaigns for this model year. Last checked October 18, 2026.

09E025000: EXTERIOR LIGHTING:HEADLIGHTS
DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
Remedy: DOPE, INC. WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON JULY 28, 2009. OWNERS MAY CONTACT DOPE, INC. AT 1-626-272-1798.
Reported May 11, 2009. View on NHTSA
07E066000: EQUIPMENT:ELECTRICAL
CERTAIN CEQUENT 90 DEGREE 7-WAY RIGHT ANGLE ADAPTORS SOLD BY DISTRIBUTORS IN TOW PACKAGES FOR AFTERMARKET SALES TO TOW 5TH WHEEL RV TRAVEL TRAILERS. DUE TO INCORRECT WIRING OF THE HARNESS, THE TRAILER LIGHTS MAY NOT OPERATE PROPERLY.
Remedy: ALL OF THE DEFECTIVE TOW PACKAGES ARE STILL AT THE DISTRIBUTOR LEVEL AND HAVE NOT BEEN SOLD TO ANY CONSUMERS.
Reported August 28, 2007. View on NHTSA
05V161000: PARKING BRAKE
ON CERTAIN PICKUP TRUCKS EQUIPPED WITH MANUAL TRANSMISSIONS AND BUILT WITH EITHER PBR PARKING BRAKE SYSTEMS OR TRW PARKING BRAKE SYSTEMS, THE PARKING BRAKE FRICTION LININGS MAY WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.
Remedy: DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH A PBR PARKING BRAKE SYSTEM. ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM, DEALERS WILL INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY. THE…
Reported April 22, 2005. View on NHTSA
05V163000: SEAT BELTS:REAR/OTHER
ON CERTAIN CREW CAB PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE 2ND ROW CENTER OCCUPANT SEAT BELT ROUTING MAY MAKE IT DIFFICULT TO POSITION THE LAP PORTION OF THE SAFETY BELT LOW AROUND THE HIPS OF OCCUPANTS, ESPECIALLY SMALLER OCCUPANTS, SEATED IN THIS POSITION. APPROPRIATE USE OF A CHILD SEAT OR BOOSTER SEAT, AS RECOMMENDED FOR SMALL CHILDREN, DOES IMPROVE THE FIT CONDITION FOR THIS USER…
Remedy: DEALERS WILL CUT OPEN THE GUIDE LOOP, REMOVE A PORTION OF THE LOOP, AND THEN THE REMAINING TWO SIDES SHOULD BE FOLDED OVER AND SECURED WITH A RETAINER FREE OF CHARGE. THE RECALL BEGAN ON JULY 21, 2005. OWNERS MAY CONTACT CADILLAC AT…
Reported April 22, 2005. View on NHTSA
04V225000: SEAT BELTS:FRONT:ANCHORAGE
CERTAIN EXTENDED AND REGULAR CAB PICKUP TRUCKS AND CARGO VANS CONVERTED TO COMPRESSED NATURAL GAS (CNG) FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, 'CHILD RESTRAINT ANCHORAGE SYSTEMS.' THESE VEHICLES HAVE ONE SEATING POSITION, THE CENTER REAR SEAT, EQUIPPED WITH CHILD RESTRAINT LOWER ANCHORAGES.
Remedy: TO BRING THE STANDARD CAB AND CARGO VAN VEHICLES INTO COMPLIANCE, DEALERS WILL INJECT EPOXY INTO THE AIR BAG OFF SWITCH TO PREVENT AIR BAG ACTIVATION, RELOCATE THE SWITCH BEHIND THE INSTRUMENT PANEL AND THEN INSTALL A COVER OVER THE…
Reported May 11, 2004. View on NHTSA
04E022000: EQUIPMENT
AFTERMARKET PICKUP TRUCK OVER-THE-RAIL BEDLINERS MANUFACTURED FOR INSTALLATION ON 1999-2004 CHEVROLET SILVERADO AND GMC SIERRA PICKUP TRUCKS. THE TOGGLE WING ASSEMBLY USED TO ATTACH THE BEDLINER TO THE TRUCK BED IS NOT ENGAGING FULLY IN THE STAKE POCKET OF THE PICKUP TRUCK.
Remedy: DURAKON WILL ISSUE A PRESS RELEASE IN ATTEMPT TO NOTIFY CUSTOMERS THAT COULD HAVE PURCHASED THE DEFECTIVE BEDLINER. IF YOU PURCHASED EITHER A DURAKON ALLSTAR OF PATRIOT OVERRAIL BEDLINER SINCE AUGUST 1, 2003, FOR 1999 TO 2004…
Reported March 23, 2004. View on NHTSA
04V129000: STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS
ON CERTAIN PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE GALVANIZED STEEL TAILGATE SUPPORT CABLES THAT RETAIN THE TAILGATE IN THE FULL OPEN (HORIZONTAL) POSITION MAY CORRODE, WEAKEN, AND EVENTUALLY FRACTURE. IF BOTH CABLES FRACTURED, THE TAILGATE WOULD SUDDENLY DROP AND STRIKE THE TOP SURFACE OF THE REAR BUMPER.
Remedy: DEALERS WILL REPLACE THE CABLES. INTERIM OWNER NOTIFICATION BEGAN ON APRIL 7, 20004. THE RECALL BEGAN ON SEPTEMBER 24, 2004, WHEN REPLACEMENT PARTS WERE AVAILABLE, AND WILL CONTINUE THROUGH OCTOBER 29, 2004. OWNERS SHOULD CONTACT…
Reported March 17, 2004. View on NHTSA
04V045000: SERVICE BRAKES, HYDRAULIC
CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 135, ?PASSENGER CAR BRAKE SYSTEMS.? SOME OF THESE VEHICLES WERE PRODUCED WITH AN OUT-OF-SPECIFICATION BRAKE HYDRO-BOOST HOUSING RELIEF VALVE BORE.
Remedy: DEALERS ARE TO REPLACE THE HYDRO-BOOST RELIEF VALVE. THE RECALL BEGAN ON JUNE 18, 2004. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2339; CHEVROLET AT 1-800-630-2438; GMC AT 1-866-996-9463; OR HUMMER AT 1-866-486-6376.
Reported February 4, 2004. View on NHTSA
03V018000: VISIBILITY:WINDSHIELD
CERTAIN PICKUP TRUCKS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 212, "WINDSHIELD MOUNTING." SOME OF THESE VEHICLES LACK A CONTINUOUS URETHANE BONDING BEAD BETWEEN THE BODY SURFACE AND THE WINDSHIELD.
Remedy: DEALERS WILL REMOVE, RESEAL, AND REINSTALL THE WINDSHIELD. OWNER NOTIFICATION BEGAN ON JANUARY 28, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A…
Reported January 23, 2003. View on NHTSA

Data sources

EPA fueleconomy.gov · retrieved October 18, 2026 · US Government public data
NHTSA vPIC · retrieved October 18, 2026 · US Government public data

Source checked: October 18, 2026

Data verified: October 18, 2026

Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.

Compare

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Frequently asked questions

What engine does the 2003 GMC Sierra have?

Varies by configuration: 4.3L 6-cylinder, 4.8L 8-cylinder, 5.3L 8-cylinder (LM7), 5.3L 8-cylinder (FLEX-FUEL), 6.0L 8-cylinder. Engines can differ by trim, so check the trim list below.

What is the fuel economy of the 2003 GMC Sierra?

Combined fuel economy is 16 mpg (14.7 L/100 km) to 13 mpg (18.1 L/100 km), as published by the source shown in the specification table.

Is the 2003 GMC Sierra front-wheel, rear-wheel or all-wheel drive?

Drivetrain: Varies by configuration: RWD, AWD.

Are there recalls for the 2003 GMC Sierra?

NHTSA lists 9 recall campaigns for this model year (last checked October 18, 2026). Details are in the Recalls section.