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.

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
Scheduled topics
6
Applicability stated
7
Exact references
1

Before ordering Identify 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 filterView intervals, applicability and sources

    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 — replaceView intervals, applicability and sources

    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 — changeView intervals, applicability and sources

    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 wiresView intervals, applicability and sources

    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 refillView intervals, applicability and sources

    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 — inspectView intervals, applicability and sources

    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 fitmentView intervals, applicability and sources

    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 →

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
Browse 5 documented records — use the filters above to narrow the list
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

Browse by tag

← All Chevrolet Corvette years