Changing ECM
Thread Starter
Instructor
Joined: Jun 2022
Posts: 194
Likes: 47
Quick question- the ECM I got is from an 89 Corvette also. It has the prom in it. Will my car run with this prom or will I have to put my original prom in it? Not sure if each prom is programmed to each individual car because of different options on car out of factory. My 89 has the 3.07 rear when I believe standard gearing was 2.59 for the automatics. This could effect shifts points.
Melting Slicks
Joined: Aug 2003
Posts: 3,386
Likes: 390
From: Lakeville MI
There were at least 10 proms released for 1989 C4s. Check the (4 letter) broadcast code on the eprom label under the blue cover of both of the memcals to determine what you really have.
6E ANYL 16.00 KB 1989 32310 16129313 1227165 9314 9311 YB L98 5.7 ML9 MAN GH0
6E ANYP 16.00 KB 1989 32388 16133627 1227165 9328 9341 YB L98 5.7 ML9 MAN G44
6E APYP 16.00 KB 1989 32386 16133472 1227165 3499 3491 YB L98 5.7 ML9 MAN GH0
6E APYZ 16.00 KB 1989 32386 16133480 1227165 3533 3571 YB L98 5.7 MD8 AUTO G44
6E APZA 16.00 KB 1989 32386 16133482 1227165 3536 3581 YB L98 5.7 MD8 AUTO GM1
6E APZB 16.00 KB 1989 32386 16133483 1227165 3539 3591 YB L98 5.7 MD8 AUTO G44
6E ARAP 16.00 KB 1989 32405 16134193 1227165 4194 4131 YB L98 5.7 MD8 AUTO G44
6E ARAR 16.00 KB 1989 32405 16134197 1227165 4198 4141 YB L98 5.7 MD8 AUTO GM1
6E ARAS 16.00 KB 1989 32405 16134203 1227165 4204 4151 YB L98 5.7 MD8 AUTO G44
6E ASXB 16.00 KB 1989 32631 16141874 1227165 1875 1851 YB L98 5.7 MD8 AUTO GM1
6E ANYL 16.00 KB 1989 32310 16129313 1227165 9314 9311 YB L98 5.7 ML9 MAN GH0
6E ANYP 16.00 KB 1989 32388 16133627 1227165 9328 9341 YB L98 5.7 ML9 MAN G44
6E APYP 16.00 KB 1989 32386 16133472 1227165 3499 3491 YB L98 5.7 ML9 MAN GH0
6E APYZ 16.00 KB 1989 32386 16133480 1227165 3533 3571 YB L98 5.7 MD8 AUTO G44
6E APZA 16.00 KB 1989 32386 16133482 1227165 3536 3581 YB L98 5.7 MD8 AUTO GM1
6E APZB 16.00 KB 1989 32386 16133483 1227165 3539 3591 YB L98 5.7 MD8 AUTO G44
6E ARAP 16.00 KB 1989 32405 16134193 1227165 4194 4131 YB L98 5.7 MD8 AUTO G44
6E ARAR 16.00 KB 1989 32405 16134197 1227165 4198 4141 YB L98 5.7 MD8 AUTO GM1
6E ARAS 16.00 KB 1989 32405 16134203 1227165 4204 4151 YB L98 5.7 MD8 AUTO G44
6E ASXB 16.00 KB 1989 32631 16141874 1227165 1875 1851 YB L98 5.7 MD8 AUTO GM1
