Which ECM should I use for my project?

There are a lot of GM ECMs out there, each with specific applications. Some are better known to the aftermarket community that others, though. When selecting an ECM it's better to pick one from an application similar to yours.

This is a list of common ECMs, and applications they were used in.


4 cyl Port injected
1227730 Hack Distributor

4 cyl Throttle body injected
1227165 Distributor

4 cyl Turbo Port injected
1227749 Distributor MAP

6 cyl Port injected
1227730 Hack Distributor

6 cyl Throttle body injected
1227747 Hack Distributor MAP

6 cyl Turbo Port injected
1227749  Hack Distributor MAP
1227148  Hack DIS MAF

8 cyl Port injected
1227730  Hack Distributor MAP
1227165  Hack Distributor MAF

8 cyl Throttle body injected
1227747 Hack Distributor MAP

8 cyl Turbo
1227749 Hack Distributor MAP