C3 ECM Cross-reference

From GM Wiki

Description

This page does not cover the newer generations of ECMs. (See: P4 ECM Cross-Reference) It also does not cover any carburetor ECMs.

These ECMs use N82S181 1Kbyte fusible-link PROMs:

1225550 1225570 1225610

1226026 1226100 1226430

1226458 1226460

These two ECMs use TMS2532 4Kbyte EPROMs:

1226156

1226864

These ECMs use 2732 4Kbyte EPROMs:

1226459 1226461 1226867 1226868 1226869 1226870 1226948 1227057 1227065 1227137 1227148 1227151 1227153

1227170 1227302 1227429 1227746 1227747 1227783 1227784 1227886 1228062 1228063 1228746 1228747 1228838

1228934 16135320 16136965 16143900 16144288 16146299 16149405 16152630 16156480 16171199 16196346 16196391 16196396

An incomplete list of Cadillac ECMs:

1226462

1226930

1227056

Car ECM selection

Arranged by model year and engine type:

	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993
1.8 OHC L4 TBI “O”LH8	1225610	1226100	1226156	1226864	1226864
1.8 OHC L4 PFI Turbo “J”LA5			1226460	1226460	1227151
2.0 L4 TBI “P” LQ5		1226026	1226026 1226458	1226867	1226867
2.5 L4 TBI “R” LR8	1225570 1225610	1226100 1226156	1226156	1226864	1226864
2.5 L4 TBI “2” LQ9	1225570 1225610	1226100	1226156	1226864	1226864
2.5 L4 TBI “U” L68				1226864	1226864
2.8 V6 PFI “S” LB8				1226870	1226870 1227302	1227302	1227302	1227302
2.8 V6 PFI “W” LB6				1226870	1226870 1227302
2.8 V6 PFI “9” L44				1226869	1227170	1227170	1227170
	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993
3.0 V6 PFI “L” LN7				1226461 1226948	1227153	1227784	1227784
3.8 V6 PFI “3” LN3			1226461	1226461 1226948 1227065
3.8 V6 SFI “B” LG2 (“E” body)					1227057
3.8 V6 SFI “B” LG2 (exc. “E” body)					1227148
3.8 V6 SFI “3” LG3 (“E” body)						1227057
3.8 V6 SFI “3” LG3 (exc. “E” body)					1227148	1227783 1227886	1227783 1227886
3.8 V6 PFI Turbo “9” LM9			1226459	1226459
3.8 V6 SFI Turbo “7” LC2					1227148	1227148		1227148
4.1 V8 “8” LT8		1226930	1226930 1226462	1226930 1226462	1227056	1227056
	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993
4.3 V6 TBI “Z” LB4				1226868	1227137	1228746	1227746 1228063	1228063	1228063		16136965	16136965
5.0 V8 CFI “7” LU5	1225550
5.0 V8 CFI “S” LU5		1226026
5.0 V8 TPI “F” LB9				1226870
5.0 V8 TBI “E” L03							1228063	1228746	1228746	1228746 16136965	1228746 16136965	16136965
5.7 V8 CFI “8” L83	1225550	1226026 1226430430	1226026 1226430430
5.7 V8 TPI “8” L98				1226870
5.7 V8 TBI “7” L05								1228746	1228746	16136965	16135320 16136965	16135320 16136965

Truck ECM selection

Arranged by model year and engine type:

	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995
2.5 L4 TBI “E” LN8	1226864	1226864
2.8 V6 TBI “R” LL2		1227429	1227429	1227429 1228062	1228062	1228062	1228062	1228062	1228062
2.8 V6 TBI “R” LL2 (Isuzu)					1228062	1228062	1228062
3.1 V6 TBI “D” LG6						1228838	16149405	16149405	16149405	16196391	16196391
3.1 V6 TBI “Z” LG6 (Isuzu)							1228838	1228838	1228838	1228838
4.3 V6 TBI “Z” LB4 (“S” & “T” body)				1228062	1228062	1227747 1228062	1227747 1228062 16144288	16144288	16152630
4.3 V6 TBI “Z” LB4 (exc. “S” & “T” body)	1226868	1227137	1227747	1227747	1227747	1227747 1228934 16143900 16144288	1227747 1228934 16143900 16144288	1228934 16143900 16144288	1228934 16144288	161963466
4.3 V6 TBI “B” LU2						1227747	1227747
5.0 V8 TBI “H” L03			1227747	1227747	1227747	1227747	1227747	16146299	16156480 16171199	16196396	16196396
	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995
5.7 V8 TBI “K” L05			1227747	1227747	1227747 1228747	1227747 1228747	1227747 1228747	1227747 1228747 16146299	16146299 16156480 16171199	16171199 16196396	16171199 16196396
7.4 V8 TBI “N” L19			1227747	1227747	1227747	1228747	1228747