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Firebird EPROM Identification Numbers for 1990

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

T

3.1

MB1

M/Trans

ALSX,

ATRJ

16146696

1227730

1092ALSX,

6697ATRJ

NA5

Fed

T

3.1

MB1

M/Trans

ALTB

ATRK

 

16146700

1227730

1122ALTB

6701ATRK

NB2

Calif

8 5.7 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 M39 M/Trans

NJH,

ATNW,

ASNH,

ANJR,

AWLS

AXYB

16163137

1227730

9513NJH,

5661ATNW,

2500ASNH,

9487ANJR,

6208AWLS

3157AXYB

F 5.0 TPI MK6

M/Trans

ATNX,

AWFZ,

ANJS,

ANJJ,

AXYC

16163138

1227730

5668ATNX,

5504AWFZ,

9483ANJS,

9508ANJJ,

3160AXYC

F 5.0 TPI MD8 A/Trans

ANHY,

ATNY,

ANJB,

AWLT,

AXYD

16163139

1227730

8210ANHY,

5672ATNY,

9521ANJB,

6212AWLT,

3164AXYD

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 

 

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 & 505/350 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