
The 2003 GMC Sierra is a full-size pickup truck, part of the second generation (1999-2007) of the Sierra. It came in various body styles, including regular, extended, and crew cabs, with short, standard, and long bed options. Key trims included the base, SLE, and SLT. The original MSRP ranged from around $20,000 to $35,000, depending on configuration and trim. It's popular for its ruggedness, capability, and a comfortable ride compared to some competitors.
The Good
The 2003 GMC Sierra offers a blend of performance and practicality. It boasts robust engine options for strong towing and hauling capabilities (practical). Its classic, muscular design and comfortable cabin appeal to emotional buyers. Known for overall reliability, it also provides good value for a dependable used truck.
The Bad
Common weaknesses of the 2003 GMC Sierra include potential issues with the fuel pump, transmission problems (especially with higher mileage), and rust, particularly in areas with road salt. Check for "Chevy lean" (uneven suspension), and listen for unusual noises from the engine or drivetrain. Interior plastics can be prone to wear.
2003 GMC Sierra: Quick Overview
- Engine Options:
- 4.3L V6: Around 200 horsepower
- 4.8L V8: Around 285 horsepower
- 5.3L V8: Around 295 horsepower
- 6.0L V8 (available on some models): Around 300-345 horsepower
- Horsepower: Ranging from 200 hp to 345 hp depending on the engine.
- Fuel Economy:
- V6: 15-17 mpg city / 19-22 mpg highway
- V8: 14-16 mpg city / 17-20 mpg highway (varies based on engine and configuration)
- 0-60 Times: Varies significantly by engine and configuration. Expect around 7-9 seconds for V8 models. V6 models will be slower.
- Towing Capacity:
- Ranges from approximately 4,000 lbs to over 8,000 lbs depending on engine, cab configuration, and drivetrain (2WD or 4WD). Always refer to the owner's manual for exact figures.
- Trim-Level Features:
- Base: Vinyl or cloth seats, basic AM/FM radio, manual windows and locks.
- SLE: Cloth seats, power windows and locks, upgraded stereo, available options like cruise control and keyless entry.
- SLT: Leather seats, premium stereo, dual-zone climate control, alloy wheels, and often included many of the available options from the SLE trim.
2003 GMC Sierra Specifications
Vehicle Information
Year | 2003 |
Make | GMC |
Model | Sierra |
Trim | - |
Style | - |
Type | Truck |
Category | Standard Pickup Truck |
Manufacturing Details
Made In | United States |
Manufacturing City | FLINT |
Dimensions
Doors | 4-Door |
Curb Weight | 5013 pounds |
Gross Vehicle Weight Rating | 7200 pounds |
Overall Height | - |
Overall Length | - |
Overall Width | - |
Wheelbase Length | - |
Standard Seating | - |
Engine & Performance
Engine | LQ4 Iron |
Engine Size | 6L |
Engine Cylinders | 8 |
Transmission | - |
Transmission Type | Automatic |
Transmission Speeds | - |
Drivetrain | All-Wheel Drive |
Additional Features
Anti-Brake System | - |
Steering Type | - |
Pricing
Manufacturer Suggested Retail Price (MSRP) | $44,255 |
Invoice Price | $38,723 |
Delivery Charges | $815 |
Vehicle History Report
Vehicle
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Specifications
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Analysis
Analysis
What Problems Does the 2003 GMC Sierra Have?
Frequently reported problems for the 2003 GMC Sierra often revolve around the fuel system, specifically fuel pump failures. Transmission issues, especially slipping or hard shifting, are also common, particularly in vehicles with higher mileage or those that haven't received regular maintenance. Rust can be a significant issue, especially in areas where road salt is used; check the rocker panels, cab corners, and frame. Some owners have reported issues with the instrument cluster, specifically the gauges failing.
Recalls for the 2003 GMC Sierra have included issues related to the brake system and possible fuel leakage in some models, so checking the vehicle's VIN for outstanding recalls is crucial before purchase. Long-term reliability concerns often involve the durability of interior plastics, which can crack or fade over time. The "Chevy lean", caused by sagging rear leaf springs, is also a common issue affecting ride quality. Engine oil consumption can be a concern with the 5.3L V8 as it ages, so regular oil level checks are essential. Generally the earlier years of this generation, including 2003, can show more wear and tear compared to later model years within the same generation.
Recalls for the 2003 GMC Sierra have included issues related to the brake system and possible fuel leakage in some models, so checking the vehicle's VIN for outstanding recalls is crucial before purchase. Long-term reliability concerns often involve the durability of interior plastics, which can crack or fade over time. The "Chevy lean", caused by sagging rear leaf springs, is also a common issue affecting ride quality. Engine oil consumption can be a concern with the 5.3L V8 as it ages, so regular oil level checks are essential. Generally the earlier years of this generation, including 2003, can show more wear and tear compared to later model years within the same generation.
How long will the 2003 GMC Sierra last?
A well-maintained 2003 GMC Sierra can easily reach 200,000 miles or more. With regular oil changes, transmission services, and general upkeep, many owners report exceeding this milestone. However, long-term durability is often tied to preventative maintenance. Weaknesses that emerge over time include increased oil consumption in the 5.3L V8, rust issues (especially in colder climates), and potential for electrical gremlins. Neglecting maintenance will significantly shorten its lifespan. Good maintenance can see this truck last 15-20 years, or even longer if significant repairs are undertaken.
What Technology & Safety Features are Included?
The 2003 GMC Sierra's tech and entertainment were fairly basic by today's standards. Standard features included an AM/FM radio, and higher trims offered a CD player, and cassette player (older models). There were no built-in driver-assistance features like lane departure warning or blind-spot monitoring. Safety features included standard front airbags and antilock brakes (ABS).
Optional features included OnStar, which provided emergency assistance and vehicle diagnostics. Some models also offered a premium Bose sound system. Driver assistance was limited to features like cruise control, if equipped. Crash test ratings from the NHTSA (National Highway Traffic Safety Administration) generally awarded the 2003 GMC Sierra 4-5 stars for frontal crash protection for the driver and passenger, and 3-4 stars for side impact protection. It's important to note that these ratings are relative to vehicles of similar size and weight from that era. In terms of modern safety standards, it would likely perform poorly in comparison.
Technology was not a selling point of this vehicle. The focus was on reliability and utility rather than advanced infotainment or safety systems. The available features were functional for the time, but clearly lack the sophistication of contemporary vehicles.
Optional features included OnStar, which provided emergency assistance and vehicle diagnostics. Some models also offered a premium Bose sound system. Driver assistance was limited to features like cruise control, if equipped. Crash test ratings from the NHTSA (National Highway Traffic Safety Administration) generally awarded the 2003 GMC Sierra 4-5 stars for frontal crash protection for the driver and passenger, and 3-4 stars for side impact protection. It's important to note that these ratings are relative to vehicles of similar size and weight from that era. In terms of modern safety standards, it would likely perform poorly in comparison.
Technology was not a selling point of this vehicle. The focus was on reliability and utility rather than advanced infotainment or safety systems. The available features were functional for the time, but clearly lack the sophistication of contemporary vehicles.
What Colors Options are Available?
Exterior Colors
Summit White
Onyx Black
Silver Birch Metallic
Dark Gray Metallic
Pewter Metallic
Dark Blue Metallic
Arrival Blue Metallic
Red Fire Metallic
Dark Carmine Red Metallic
Interior Colors
Light Pewter
Graphite
Neutral
2003 GMC Sierra Prices and Market Value
When new, the 2003 GMC Sierra ranged from around $20,000 for a base model to $35,000+ for a fully loaded SLT trim. Currently, used market prices typically range from $3,000 to $12,000, depending on condition, mileage, and configuration. Depreciation has been significant, but these trucks hold some value due to their reputation for durability and utility. Factors affecting resale value include rust, mechanical condition, mileage, and trim level. 4x4 models tend to command a premium, as do those in excellent condition with documented maintenance records.
2003 GMC Sierra Cost of Ownership
Owning a 2003 GMC Sierra can be moderately expensive. Insurance costs are typically average for a full-size truck. Fuel economy is not great, especially with the V8 engines. Maintenance costs can be reasonable if you perform some work yourself, but repairs can be costly, particularly for transmission or engine issues. Long-term, rust repair and component replacement can add up. It's not the most economical vehicle to own, but its durability can offset some of the costs if properly maintained.
2003 GMC Sierra Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
26 gallons
City Mileage
11 miles/gallon
Highway Mileage
15 miles/gallon
2003 GMC Sierra Safety Rating
NHTSA
IIHS
2003 GMC Sierra Recalls & Defects
Equipment
Recall date
2004-03-23
Recall no.
04e022000
Source
NHTSA
Summary
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.
Consequence
THE Bedliner CAN Become Detached From THE Pickup While IT IS Motion, Possibly Endangering Following Motorists or Pedestrians.
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 Chevrolet Silverado or GMC Sierra Trucks, or Purchased ONE OF These Pickup Trucks With Either Brand Bedliner Already Installed, YOU Should Return TO AN Authorized Durakon Dealer SO That THE Bedliner CAN BE Inspected And, IF Necessary, Repaired With A Newly Designed Toggle Wing Fastening System, or IF Required, Replaced With A NEW Bedliner Free OF Charge. Please Call THE Durakon Hotline AT 1-800-933-4200 TO Find THE Nearest Authorized Durakon Dealer.
Notes
This Recall Only Pertains TO Aftermarket Overrail Bedliners and HAS NO Relation TO ANY Original Equipment Installed ON Chevrolet Silverado and GMC Sierra Pickup Trucks BY General Motors.customers CAN Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Structure:body:tailgate:hinge and Attachments
Recall date
2004-03-17
Recall no.
04v129000
Source
NHTSA
Summary
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.
Consequence
Anyone Sitting or Standing ON THE Horizontal Surface OF THE Tailgate When Both Cables Fractured Could BE Injured BY Falling From THE Tailgate. ON Vehicles That Have HAD THE Bumper Removed, THE Tailgate MAY Drop Even Lower. Additionally, IF There IS Cargo ON THE Tailgate THE Cargo MAY Fall OFF IF THE Support Cables Fracture.
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 Cadillac AT 1-866-982-2339, Chevrolet AT 1-800-630-2438 or GMC AT 1-866-996-9463, or Visit Www.mygmlink.com, and Enter Your Vehicle Identification Number.
Notes
GM Recall NO. 04007.customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Seat Belts:front:anchorage
Recall date
2004-05-11
Recall no.
04v225000
Source
NHTSA
Summary
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.
Consequence
THE Standard Requires Child Seat Lower Anchorages IN Two Seating Positions FOR Vehicles With Three Rear Seating Positions. THE Standard Cab and Cargo Van Vehicles, Which Only Have Front Seating Positions, Have AN AIR BAG OFF Switch TO Disable THE Front Passenger AIR BAG and DO NOT Have Child Restraint Lower Anchorages IN THE Passenger Seat. THE Standard Requires Passenger Seat Child Seat Lower Anchorages IN Vehicles With AN AIR BAG OFF Switch. However, THE Standard Does NOT Require Vehicles With Only Front Seating Positions TO Have Lower Anchorage Provisions IF THE Vehicle IS NOT Equipped With AN AIR BAG OFF Switch.
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 Resulting Opening. THE SUN Visor Label and Owner's Manual Will Also BE Changed. THE Correction FOR THE Extended Cab Vehicle Will Consist OF Changing THE Front Passenger Seat TO A Seat That HAS Child Restraint Lower Anchorages. THE Recall Began ON September 9, 2004. Owners Should Contact Chevrolet AT 1-800-630-2438 or GMC AT 1-866-996-9463.
Notes
GM Recall NO. 04038.customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Service Brakes, Hydraulic
Recall date
2004-02-04
Recall no.
04v045000
Source
NHTSA
Summary
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.
Consequence
Consequently, THE Valve O-Ring Seal MAY Fracture. Steering Efforts MAY BE Slightly Increased While Braking or Parking. Under Certain Driving Conditions, A Fractured Seal MAY Require A Slight Increase IN THE Applied Brake Pedal Effort TO Achieve THE Same Vehicle Deceleration Rate AS Prior TO THE Seat Fracture.
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.
Notes
GM Recall NO. 04004.customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Parking Brake
Recall date
2005-04-22
Recall no.
05v161000
Source
NHTSA
Summary
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.
Consequence
IF THE Parking Brake Does NOT Hold, Unintended Vehicle Movement Could Occur, Which Could Result IN A Crash.
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 Recall Began ON July 29, 2005. Owners MAY Contact Chevrolet AT 1-800-630-2438 or GMC AT 1-866-996-9463.
Notes
GM Recall NO. 05042.customers MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Http://Www.safercar.gov.
Seat Belts:rear/Other
Recall date
2005-04-22
Recall no.
05v163000
Source
NHTSA
Summary
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 Group. IN Addition TO Instructions ON Proper Infant and Young Child Restraint (With Child Seats or Boosters), Special Verbiage FOR Restraining Older Child IS Included IN THE Owner's Manual. Also, THE Suggested Seat Belt Fit/Routing FOR Adults, Irrespective OF Seating Position, IS Described IN THE Owner's Manual Text.
Consequence
A LAP Portion OF THE Seat Belt Routing That IS NOT Low and Snug ON THE Hips CAN Allow THE LAP Belt TO Ride UP ON AN Occupant's Abdomen Instead OF Fitting Low Around Their Hipbones, and Therefore, CAN Expose Them TO More Risk OF Abdominal and Internal Organ Injury.
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 1-866-982-2339, Chevrolet AT 1-800-630-2438, GMC AT 1-866-996-9463, or Hummer AT 1-800-732-5493.
Notes
GM Recall NO. 05037.customers MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Http://Www.safercar.gov.
Visibility:windshield
Recall date
2003-01-23
Recall no.
03v018000
Source
NHTSA
Summary
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.
Consequence
IN Vehicles With This Condition, THE Windshield MAY NOT BE Retained IN Accordance With THE Safety Standard During A Vehicle Crash.
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 Reasonable Time Should Contact Chevrolet AT 1-800-222-1020 or GMC AT 1-800-462-8782.
Notes
GM Recall NO. 03001. Customers CAN Also Contact THE National Highway Traffic Safety Administration's Auto Safety Hotline AT 1-888-Dash-2-dot (1-888-327-4236).
Equipment:electrical
Recall date
2007-08-28
Recall no.
07e066000
Source
NHTSA
Summary
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.
Consequence
IF THE Trailer Lights ARE NOT Working Properly, A Vehicle Crash CAN Occur.
Remedy
All OF THE Defective TOW Packages ARE Still AT THE Distributor Level and Have NOT Been Sold TO ANY Consumers.
Notes
This Recall Only Pertains TO Aftermarket Cequent TOW Packages and HAS NO Relation TO ANY Original Equipment Installed ON Daimlerchrysler, Gmc, or Ford Vehicles.customers MAY Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty: 1-800-424-9153); or GO TO Http://Www.safercar.gov.
Exterior Lighting:headlights
Recall date
2009-05-11
Recall no.
09e025000
Source
NHTSA
Summary
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.
Consequence
Decreased Lighting Visibility MAY Result IN A Vehicle Crash.
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.
Notes
This Recall Only Pertains TO Aftermarket Replacement Equipment and HAS NO Relation TO ANY Original Equipment Installed ON Vehicles Produced BY THE Vehicle Manufacturer.in Order TO Determine IF Your Aftermarket Lamp Assembly IS Affected BY This Noncompliance, Please Review THE List OF Model Numbers Provided TO US BY Dope, Inc.the List CAN BE Found Under "document Search" Located AT THE Bottom OF Your Screen. Owners MAY Also Contact THE National Highway Traffic Safety Administration's Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO <A Href=http://Www.safercar.gov>http://www.safercar.gov</a> .
2003 GMC Sierra Insurance
Insurance for a 2003 GMC Sierra is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2003 GMC Sierra Compare to Other Truck?
The 2003 GMC Sierra competes with trucks like the Ford F-150, Dodge Ram 1500, and Toyota Tundra. In terms of performance, the Sierra's V8 engines are comparable to those offered by Ford and Dodge, while the Tundra offers a slightly different driving experience. Feature-wise, the Sierra is fairly basic, especially in lower trims, and generally lags behind the F-150 in terms of available options.
Reliability is a mixed bag; the Sierra can be reliable with proper maintenance, but the aforementioned fuel pump and transmission issues are a concern. The Toyota Tundra generally enjoys a better reputation for long-term reliability. Price-wise, a used 2003 Sierra is often competitive with similar-year F-150s and Rams.
Alternatives to the 2003 GMC Sierra include a Toyota Tundra of the same year for potentially better reliability (though it may cost more), or a later model year (2005-2007) GMC Sierra or Chevrolet Silverado for incremental improvements and potentially fewer issues. A well-maintained Ford F-150 could also be considered, but research common problems for that model year as well. Ultimately, the best choice depends on individual needs and priorities, such as budget, desired features, and tolerance for potential repairs.
Reliability is a mixed bag; the Sierra can be reliable with proper maintenance, but the aforementioned fuel pump and transmission issues are a concern. The Toyota Tundra generally enjoys a better reputation for long-term reliability. Price-wise, a used 2003 Sierra is often competitive with similar-year F-150s and Rams.
Alternatives to the 2003 GMC Sierra include a Toyota Tundra of the same year for potentially better reliability (though it may cost more), or a later model year (2005-2007) GMC Sierra or Chevrolet Silverado for incremental improvements and potentially fewer issues. A well-maintained Ford F-150 could also be considered, but research common problems for that model year as well. Ultimately, the best choice depends on individual needs and priorities, such as budget, desired features, and tolerance for potential repairs.
Ranks #458 Truck
1 | 2023 Toyota Tundra | (5.0★) |
2 | 2022 Honda Ridgeline | (5.0★) |
3 | 2023 Ford E-Transit Chassis | (0.0★) |
4 | 2020 Mercedes-Benz Sprinter Cab Chassis | (0.0★) |
5 | 2024 Chevrolet Silverado 3500HD | (0.0★) |
6 | 2023 Hyundai Santa Cruz | (5.0★) |
7 | 2023 Nissan Frontier | (5.0★) |
8 | 2024 GMC Sierra 2500HD | (0.0★) |
9 | 2023 Ram 4500 | (0.0★) |
10 | 2022 Jeep Gladiator | (5.0★) |
11 | 2012 Suzuki Equator | (0.0★) |
12 | 2009 Mitsubishi Raider | (5.0★) |
458 | 2003 GMC Sierra | (0.0★) |
Final Verdict: Is the 2003 GMC Sierra a Good Truck?
The 2003 GMC Sierra is a decent used truck for someone needing a capable and relatively affordable full-size pickup. It's ideal for those who prioritize utility and aren't overly concerned with modern tech features. It's worth buying *if* you find one in good condition with documented maintenance history and have it thoroughly inspected by a mechanic before purchase. Look for SLE or SLT trims for a better feature set. Be prepared for potential repairs, especially if the truck has high mileage. It's not recommended as a "new" purchase since it's a used vehicle. Avoid heavily rusted examples or those with obvious signs of neglect. If reliability is your top priority, consider a Toyota Tundra instead, but be prepared to pay a premium.