1978 Pontiac Firebird Hardtop Coupe — 231 cu in Buick V6, 2-barrel, 3-speed manual

Service topics

3

Factory intervals

2

Fitment-scoped

3

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.

• 01

  Spark plugs

  Sourced interval available

  Applies to: 1978 · United States (49-state federal reference schedule) · The federal database transcribes separate 1978 General Motors Schedule I and II packages for Pontiac. Match the schedule designation to the underhood emissions label; this source does not establish the rest of the owner's maintenance table. The Schedule I 22,500-mile replacement excludes six-cylinder engines.

  Published interval: 22,500 mi · Schedule I; replace except on six-cylinder engines.

  Source: U.S. DOT/NHTSA — 1978 General Motors Pontiac scheduled-maintenance packages · Appendix D, page D-49 — Emissions III · checked 2026-08-24

  Schedule II engine family

  Applies to: 1978 · United States (49-state federal reference schedule) · The federal database transcribes separate 1978 General Motors Schedule I and II packages for Pontiac. Match the schedule designation to the underhood emissions label; this source does not establish the rest of the owner's maintenance table.

  Published interval: 30,000 mi · Schedule II; replace.

  Source: U.S. DOT/NHTSA — 1978 General Motors Pontiac scheduled-maintenance packages · Appendix D, page D-52 — Emissions III · checked 2026-08-24

• 02

  Air-cleaner element

  Sourced interval available

  Applies to: 1978 · United States (49-state federal reference schedule) · The federal database transcribes separate 1978 General Motors Schedule I and II packages for Pontiac. Match the schedule designation to the underhood emissions label; this source does not establish the rest of the owner's maintenance table. The Schedule I replacement excludes four-cylinder engines.

  Published interval: 30,000 mi · Schedule I; replace except on four-cylinder engines.

  Source: U.S. DOT/NHTSA — 1978 General Motors Pontiac scheduled-maintenance packages · Appendix D, page D-49 — Emissions IV · checked 2026-08-24

  Schedule II engine family

  Applies to: 1978 · United States (49-state federal reference schedule) · The federal database transcribes separate 1978 General Motors Schedule I and II packages for Pontiac. Match the schedule designation to the underhood emissions label; this source does not establish the rest of the owner's maintenance table.

  Published interval: 30,000 mi · Schedule II; replace.

  Source: U.S. DOT/NHTSA — 1978 General Motors Pontiac scheduled-maintenance packages · Appendix D, page D-52 — Emissions III · checked 2026-08-24

• 03

  Engine oil filter — catalog fitment

  Exact reference available

  Manufacturer-catalog fitment scoped to the exact engine row in the Firebird application table.

  Baldwin B43-S cataloged fitment

  This manufacturer application record establishes filter fitment only; it does not alter the separately sourced service schedule.

  Applies to: 1978 · 231 cu in Buick V6, 2-barrel · United States · Baldwin's exact 1978 Firebird V6-231 (3.8L), code A row assigns B43-S; confirm the engine code and installed filter before ordering.

  Source: Parker/Baldwin Filters — 2025 Automotive Applications catalog · PDF page 937, Pontiac 1978 Firebird V6-231 (3.8L), code A row — Lube — B43-S · checked 2026-08-31

  Verified ordering references

  • Validated equivalentBaldwin B43-S

    Qty. 1 · Engine lubricating-oil filter · catalog-listed

    Cataloged for the 1978 Firebird V6-231 (3.8L), code A; verify engine code and installed dimensions.

    Catalog: Parker/Baldwin Filters — 2025 Automotive Applications catalog · PDF page 937, Pontiac 1978 Firebird V6-231 (3.8L), code A row — Lube — B43-S · checked 2026-08-31

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