Go to: Main Menu 1987 1988 1989 1990 1991 1992

Firebird EPROM Identification Numbers for 1991

This Decal May differ year to year

 

VIN 8th didget

Engine 

RPO Codes

 Options & Emissions Designation

Production Broadcast Code

Production  (ECM #)

Service Controller # (ECM)

Production PROM Code

8 5.7 TPI MD8 A/Trans

ANJF,

ANJA,

AUJP

16151348 1227730

4307ANJF,

4312ANJA,

1350AUJP

E 5.0 TBI MD8 A/Trans

ANTS

AXKS

16161107

1228746

8022ANTS

1108AXKS

NB2 Calif 

E

5.0 TBI

MD8

A/Trans

ANTT

AXKT

16161112

1228746

8026ANTT

1113AXKT

NA5 Fed 

E

5.0 TBI

M39

M/Trans

ANTP, 

APTX

16161117

1228746

8010ANTP

2250APTX

NB2 Calif  

E

5.0 TBI

M39

M/Trans

ANTR, 

APTY

AXKW

16161123

1228746

8016ANTR 

2254APTY

1124AXKW

NA5 FED 
F 5.0 TPI MK6

M/Trans

ATNX,

AWFZ,

ANJS,

ANJJ,

AXYC

16163138

1227730

5668ATNX

5504AWFZ

9483ANJS

9508ANJJ

3160AXYC

T 3.1 MPFI MD8 A/Trans

ALSZ, ATFM, ATXF,

ARPM, 

AUJW

AYCH,

AZYT

16171406

1227730

2715ALSZ 4201ATFM 7700ATXF

5185ARPM 

0976AUJW

4297AYCH

1407AZYT

NA5 Fed Emissions
T 3.1 MPFI MD8 A/Trans

ALTD,

ATFN,

ATXH,

ARPN,

AUJX

AYCF

AZTX

16171410

1227730

2711ALTD

4207ATFN,

7703ATXH

5189ARPN

0982AUJX

4293AYCF

1411AZTX

NB2 California Emissions 
F 5.0 MD8 A/Trans

ASYT,

AUTR

16153072

1227730

3688ASYT

3188AUTR

NA5 Federal Emissions
F 5.0 MD8 A/Trans

ARZC,

AWFU,

AXXB

16163062

1227730

9171ARZC

5509AWFU

3036AXXB

QPE 16" Tires
QPH 15" Tires
F 5.0 M39 M/Trans

ARZF,

AWFW,

AXXC

16163066

1227730

9176ARZF,

5514AWFW,

3067AXXC

QPE 16" Tires
QPH 15" Tires
F 5.0 M39 M/Trans

AWFX,

AXXD

16163070

1227730

5518AWFX,

3072AXXD

QLC 16" Tires
F 5.0 MD8 A/Trans

ARZU,

AWFY,

AXXF

16163075

1227730

9184ARZU,

5523AWFY,

3076AXXF

QLC 16" Tires
T 3.1 MB1 M/Trans

ARPL, ARPK, BAWX

16176864

1227730

5180ARPL, 5176ARPK, 6865BAWX

 

VIN Engine Displacement Engine Type Service Controller # (ECM)
T 3.1 MPFI 1227730
E 5.0 TBI 1228746

F & 8

5.0 & 5.7

TPI

1227730

NOTE: The above is NOT a mistake, the 1227730 was used in both the 3.1 & 305/350 TPI

NOTE: 1227727 is a under the hood waterproof version of the 1227730

Tuning the 1227730 Visit http://www.diy-efi.org/gmecm/ecm_info/1227730/qanda.html

See a picture of the innards at www.jeack.com