Car Model History

Third generation · Aero F-body · 1982–1992

1991Pontiac Firebird

A lighter, sharply aerodynamic redesign with pop-up headlights and a large hatchback glass; fuel injection arrived during the run and the convertible returned for 1989.

Third generation · Aero F-body

1991 Pontiac Firebird — exact-model-year car

Photo: “1991 Pontiac Firebird (3758959420).jpg” by Robert Stinnett from St. Peters, Missouri, United States / Wikimedia Commons, licensed under CC BY 2.0. Cropped to 16:9.

The 1991 model year

Overview

Pontiac's 1991 factory literature documents Firebird, Firebird Formula, Trans Am, Trans Am GTA as the marketed Firebird models, with 4 distinct engine applications. This third-generation record keeps the model, engine, body, and transmission boundaries tied to the exact year instead of carrying adjacent-year options forward.

Specifications

Engines
  • 3.1L multi-port-injected V6
  • 5.0L throttle-body-injected V8
  • 5.0L tuned-port-injected V8
  • 5.7L tuned-port-injected V8
Transmissions
Five-speed manual (application-dependent), Automatic (application-dependent)
Body styles
Two-door hatchback coupe

Year over year

What changed

  • The verified 1991 roster contains 4 marketed model lines; appearance packages and engine options are not promoted as standalone models without a printed factory pairing.
  • Engine and transmission availability changed repeatedly during the 1982–1992 generation, so this page does not reuse a neighboring year's service or ordering matrix.

Worth knowing

Notable

  • The source-backed year-level inventory includes Firebird, Firebird Formula, Trans Am, Trans Am GTA without manufacturing unsupported trim-by-engine cross-products.

Living with it

Reliability & ownership notes

  • Verify the VIN engine code, transmission, emissions label, body, and build date before ordering parts; shared displacement does not establish the induction system or service application.
  • Inspect cooling, fuel and ignition systems, hatch or convertible seals, electrical accessories, collision repair, corrosion, and modification quality on any survivor.

Maintenance & service parts

Keep your 1991 Firebird 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 1991 Pontiac Firebird. Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
6
Scheduled topics
5
Applicability stated
6
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: 1991 · 5.0L (305 cu in) V8 · United States · This recovered schedule is scoped to the cited 5.0L V8 configuration; other engines and configuration-specific requirements are not claimed.

    Published interval: 7,500 mi / 12,000 km · Normal service.

    Source: Pontiac — 1991 Firebird V8-305 5.0L VIN F FI factory normal-service schedule (preserved service-manual database) · Maintenance > Service Intervals > Normal Service — recurring 7,500-mile rows · checked

  • Spark plugsView intervals, applicability and sources

    Spark plugs

    Sourced interval available

    Applies to: 1991 · 5.0L (305 cu in) V8 · United States · This recovered schedule is scoped to the cited 5.0L V8 configuration; other engines and configuration-specific requirements are not claimed.

    Published interval: 30,000 mi / 48,000 km · Replace under normal service.

    Source: Pontiac — 1991 Firebird V8-305 5.0L VIN F FI factory normal-service schedule (preserved service-manual database) · Maintenance > Service Intervals > Normal Service — 30,000-mile row and repeating rows · checked

  • Engine air-filter elementView intervals, applicability and sources

    Engine air-filter element

    Sourced interval available

    Applies to: 1991 · 5.0L (305 cu in) V8 · United States · This recovered schedule is scoped to the cited 5.0L V8 configuration; other engines and configuration-specific requirements are not claimed.

    Published interval: 30,000 mi / 48,000 km · Replace under normal service.

    Source: Pontiac — 1991 Firebird V8-305 5.0L VIN F FI factory normal-service schedule (preserved service-manual database) · Maintenance > Service Intervals > Normal Service — 30,000-mile row and repeating rows · checked

  • Engine coolantView intervals, applicability and sources

    Engine coolant

    Sourced interval available

    Applies to: 1991 · 5.0L (305 cu in) V8 · United States · This recovered schedule is scoped to the cited 5.0L V8 configuration; other engines and configuration-specific requirements are not claimed.

    Published interval: 30,000 mi / 48,000 km · Replace under normal service.

    Source: Pontiac — 1991 Firebird V8-305 5.0L VIN F FI factory normal-service schedule (preserved service-manual database) · Maintenance > Service Intervals > Normal Service — 30,000-mile row and repeating rows · checked

  • Automatic transmission fluid and filterView intervals, applicability and sources

    Automatic transmission fluid and filter

    Sourced interval available

    Applies to: 1991 · 5.0L (305 cu in) V8 · United States · This recovered schedule is scoped to the cited 5.0L V8 configuration; other engines and configuration-specific requirements are not claimed.

    Published interval: 100,000 mi / 160,000 km · Normal-service replacement for the cited automatic-transmission configuration.

    Source: Pontiac — 1991 Firebird V8-305 5.0L VIN F FI factory normal-service schedule (preserved service-manual database) · Maintenance > Service Intervals > Normal Service — 100,000-mile row · checked

  • Engine oil filter — catalog fitmentView intervals, applicability and sources

    Engine oil filter — catalog fitment

    Exact reference available

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

    Baldwin B35-S cataloged fitment

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

    Applies to: 1991 · 3.1-liter V6 · United States · Baldwin's exact 1991 Firebird V6-189 (3.1L), VIN T row assigns B35-S; confirm the engine code and installed filter before ordering.

    Source: Parker/Baldwin Filters — 2025 Automotive Applications catalog · PDF page 600, Pontiac 1991 Firebird V6-189 (3.1L), VIN T row — Lube — B35-S · 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. Pontiac Motor Division — 1991 factory Firebird literature

Other Third generation years

All Third generation · Aero F-body years →

Documented lineup

Find your exact 1991 Firebird

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

1factory 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.

1versions shown
Browse 1 documented records — use the filters above to narrow the list
Two-door rear-wheel-drive coupe

Pontiac Firebird Base Coupe Manual

Body
Two-door rear-wheel-drive coupe
Engine
3.1-liter V6
Gearbox
5-speed manual
Built
Regular production
Open exact version

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