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If no code 12 then the ECM is bad. Here is a list of ECM's that will interchange. Keep in mind you still need your PROM out of your ECM to plug into your new one.
1987-90 Astro/Safari Van with 2.5L 4 cylinder
1987-88 Blazer S10/Jimmy S15 with 2.5L 4 cylinder
1991 BlazerS10/Jimmy S15 with 4.3L 6 cylinder (with 1227165 ECM)
1991 Bravada (with 1227165 ECM)
1987 Camaro/Firebird with 5.7L 8 cylinder
1988 Camaro/Firebird with 5.0L 8 cylinder with MFI
1988 Camaro/Firebird with 5.7L 8 cylinder
1986-87 Camaro/Firebird with 5.0L 8 cylinder with EFI
1989 Camaro/Firebird with 5.0L 8 cylinder with MFI
1986 Cavalier/Cimarron with 2.0L 4 cylinder and manual trans
1989 Camaro/Firebird with 5.7L 8 cylinder
1986 Firenza/Skyhawk/Sunbird with 2.0L 4 cylinder and manual trans
1986-89 Corvette
1987-91 S10/S15/Sonoma with 2.5L 4 cylinder
1991 S10/S15/Sonoma with 4.3L 6 cylinder (with 1227165 ECM)
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Current cars: 
99 Z28
06 Silverado
14 Silverado |