The Fiero Engine Control Module (ECM) was used in several GM cars besides the Fiero but the PROM (Programmable Read Only Memory) chip within the ECM is unique to the Fiero. If an ECM is salvaged from another vehicle and installed in a Fiero, be sure to install the correct Fiero PROM. The PROM is unique for each engine/transmission combination. A PROM from a Fiero V-6 with manual transmission will not work in a Fiero V-6 with automatic transmission. Also, a PROM may not swap between years even if the engine/transmission combination is the same.
The cars below have ECMs that will swap into the Fiero.
Pontiac 2000 '84 1.8L w/o turbocharger Pontiac 6000 '84 2.5L Camaro '84 2.5L Chevy Celebrity '84 2.5L Buick Century '84 2.5L Olds Ciera '84 2.5L Chevy Citation '83 2.5L auto trans, 2.39 axle, ident #1226156 Chevy Citation '84 2.5L Firebird '84 2.5L Olds Firenza '84 2.5L Olds Omega '83 2.5L auto trans, 2.39 axle, ident #1226156 Olds Omega '84 2.5L Pontiac Phoenix '83 2.5L auto trans, 2.39 axle, ident #1226156 Pontiac Phoenix '84 2.5L Buick Skyhawk '84 1.8L w/o turbocharger Buick Skylark '84 2.5L
Pontiac 6000 '85-86 2.5L Pontiac Astro '85-86 2.5L Blazer S10/GM Jimmy S15 '85-86 2.5L Olds Calais '85-86 2.5L Camaro '85-86 2.5L Chevy Celebrity '85-86 2.5L Buick Century '85-86 2.5L Olds Ciera '85-86 2.5L Chevy Citation '85 2.5L Olds Cutlass '86 2.5L Firebird '85-86 2.5L Olds Firenza '85-86 1.8L Pontiac Grand Am '85-86 2.5L S10/S15/GM Sonoma '85-86 2.5L Pontiac Safari '85-86 2.5L Buick Skyhawk '85-86 1.8L w/o turbocharger Buick Skylark '85-86 2.5L Buick Somerset '85-86 2.5L Pontiac Sunbird '85-86 1.8L w/o turbocharger
Pontiac 6000 '87-91 2.5L Chevrolet Beretta '87-91 2.2L Olds Calais '87-91 2.5L Cavalier '90-91 2.2L Chevy Celebrity '87-90 2.5L Buick Century '87-92 2.5L Chevy Forward Control '89 gasoline Chevy Pickup '89 gasoline Chevy Van '89 gasoline Olds Ciera '87-92 2.5L Chevy Corsica '90-91 2.2L Olds Firenza '87-88 2.0L overhead cam GMC Forward Control '89 gasoline GMC Pickup '89 gasoline GMC Van '89 gasoline Pontiac Grand Am '87-91 2.5L Buick Skyhawk '87 2.0L w/o turbocharger Buick Skyhawk '88 overhead cam Buick Skylark '87-91 2.5L Buick Somerset '87 2.5L Chevy Suburban '89 gasoline Pontiac Sunbird '87-90 2.0L w/o turbocharger Pontiac Sunbird '91 2.0L Pontiac Tempest '90-91 2.2L