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

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