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

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