Car Model History

Fifth generation · C5 · 1997–2004

2003Chevrolet Corvette

A clean-sheet C5 with the new LS1 V8 and a rear transaxle for balance. The hardcore Z06 returned for 2001 with the LS6, reviving the badge after a 38-year absence.

Fifth generation · C5

2003 Chevrolet Corvette — C5 convertible, front three-quarter view

Photo: “2003 Chevrolet Corvette Convertible, front right, 07-06-2023.jpg” by MercurySable99 / Wikimedia Commons, licensed under CC BY-SA 4.0. Cropped to 16:9.

Start here

What do you need to know?

This page covers the whole 2003 Chevrolet Corvette model year. Choose your task first; exact trims and engines are separated where the factory offered different versions.

Documented lineup

Find your exact 2003 Corvette

Start with a family, body style, or engine. Every card opens the facts and maintenance information for that factory version.

5factory configurations
Exact factory pairings documentedHow this lineup was verified

These source-backed records identify published body, engine, and transmission combinations. Exact pairings do not by themselves assert that every factory option or special edition is represented.

5versions shown
Coupe with removable roof panel

Corvette Coupe with removable roof panel — 4-speed automatic

Body
Coupe with removable roof panel
Engine
5.7L LS1 V8
Gearbox
4-speed automatic
Built
Regular production
Open exact version
Coupe with removable roof panel

Corvette Coupe with removable roof panel — 6-speed manual

Body
Coupe with removable roof panel
Engine
5.7L LS1 V8
Gearbox
6-speed manual
Built
Regular production
Open exact version
Convertible

Corvette Convertible — 4-speed automatic

Body
Convertible
Engine
5.7L LS1 V8
Gearbox
4-speed automatic
Built
Regular production
Open exact version
Convertible

Corvette Convertible — 6-speed manual

Body
Convertible
Engine
5.7L LS1 V8
Gearbox
6-speed manual
Built
Regular production
Open exact version
Fixed-roof coupe (Z06)

Z06 Fixed-roof coupe (Z06) — 6-speed manual

Body
Fixed-roof coupe (Z06)
Engine
5.7L LS6 V8 (Z06)
Gearbox
6-speed manual
Built
Regular production
Open exact version

The 2003 model year

Overview

The 2003 Chevrolet Corvette was the C5 model-year specification for the U.S. market. Its documented factory range comprised 5.7L LS1 V8, 5.7L LS6 V8 (Z06) with 4-speed automatic or 6-speed manual.

Specifications

Engines
  • 5.7L LS1 V8
  • 5.7L LS6 V8 (Z06)
Transmissions
4-speed automatic, 6-speed manual
Body styles
Fixed-roof coupe (Z06), Coupe with removable roof panel, Convertible

Year over year

What changed

  • The LS6-powered Z06 sat above LS1 coupe and convertible models.

Worth knowing

Notable

  • This page records the U.S. 2003 factory powertrain and body-style range rather than borrowing a nearby model year's specification.

Living with it

Reliability & ownership notes

  • For a 2003 Corvette, verify the VIN, installed powertrain and service history against the exact-year GM document; age, modifications and deferred maintenance are more useful evidence than generation-wide reputation.
  • Check the NHTSA VIN lookup for unrepaired safety recalls before purchase or road use.

Maintenance & service parts

Keep your 2003 Corvette on the road

Start with the service interval, then match the engine or exact version you own. Order links appear only when a catalog-backed part number is available, and every listing still needs a fitment check.

Service desk

What this car needs & when

Use this as a service-planning checklist for 2003 Chevrolet Corvette. Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
7
Factory intervals
6
Fitment-scoped
7
Exact references
1

Before orderingIdentify your engine, options and build date.Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.

  • Engine oil and filter

    Sourced interval available

    Applies to: 2003 · United States

    Published interval: 12 months · When the Engine Oil Life System indicates, or at least once every 12 months.

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Engine air-cleaner filter — replace

    Sourced interval available

    Inspect at 15,000-mile offsets when driving in dusty conditions and replace sooner if necessary.

    Applies to: 2003 · United States

    Published interval: 30,000 mi

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Automatic-transmission fluid and filter — change

    Sourced interval available

    The manual says the manual-transmission fluid does not require scheduled changing.

    Applies to: 2003 · United States

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

    Severe service

    Applies to: 2003 · Automatic · United States · Hot heavy-city traffic, hills/mountains, or high-performance operation.

    Published interval: 50,000 mi

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

    Normal service

    Applies to: 2003 · Automatic · United States · Normal service.

    Published interval: 100,000 mi

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Spark plugs — replace and inspect wires

    Sourced interval available

    Applies to: 2003 · United States

    Published interval: 100,000 mi

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Cooling system — drain, flush and refill

    Sourced interval available

    Applies to: 2003 · United States

    Published interval: 150,000 mi / 60 months · Whichever occurs first.

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Engine accessory drive belt — inspect

    Sourced interval available

    Applies to: 2003 · United States

    Published interval: 150,000 mi

    Source: Chevrolet — 2003 Corvette Owner's Manual · Maintenance Schedule — Scheduled Maintenance / Additional Required Services · checked

  • Engine oil filter — catalog fitment

    Exact reference available

    Manufacturer-catalog fitment only; use the engine-specific option below and verify the VIN before ordering.

    Baldwin B31 cataloged fitment

    This manufacturer application record establishes replacement-filter fitment only; it does not alter Chevrolet's service interval.

    Applies to: 2003 · 5.7L LS1 V8 · Corvette · United States · Baldwin's exact 2003 Corvette V8-350 5.7L FI, VIN G (LS1) application row assigns B31; verify the VIN and installed filter before ordering.

    Source: Parker/Baldwin Filters — 2025 Automotive Applications catalog · Chevrolet 2003 Corvette V8-350 5.7L FI, VIN G (LS1) application row — Lube — B31 · checked

    Verified ordering references

    Baldwin B31 cataloged fitment

    This manufacturer application record establishes replacement-filter fitment only; it does not alter Chevrolet's service interval.

    Applies to: 2003 · 5.7L LS6 V8 (Z06) · Z06 · United States · Baldwin's exact 2003 Corvette V8-350 5.7L FI, VIN S (LS6 Z06) application row assigns B31; verify the VIN and installed filter before ordering.

    Source: Parker/Baldwin Filters — 2025 Automotive Applications catalog · Chevrolet 2003 Corvette V8-350 5.7L FI, VIN S (LS6 Z06) application row — Lube — B31 · checked

    Verified ordering references

Collect

Bring this model year home

Find a scale model using the exact year, make, and model—not a generic generation search.

Famous variants this year

Sources

  1. Chevrolet — 2003 Corvette Owner's Manual
  2. NHTSA — VIN recall lookup

Other Fifth generation years

Explore the C5 generation →All Fifth generation · C5 years →

Browse by tag

← All Chevrolet Corvette years