4l65 E conversion questions
Therefore, the many threads here on T56 to 4L60E conversion will all apply.
The biggest issue wiring wise is the getting a trans harness and pinning it into the PCM connectors. IIRC Speartech sells one for around $150.
You also need to get the PCM reprogrammed to support the 4L65E; various mail-order tuners can do that for you.
Hopefully others more familiar with the details will chime in here with links to existing threads.
Therefore, the many threads here on T56 to 4L60E conversion will all apply.
The biggest issue wiring wise is the getting a trans harness and pinning it into the PCM connectors. IIRC Speartech sells one for around $150.
You also need to get the PCM reprogrammed to support the 4L65E; various mail-order tuners can do that for you.
Hopefully others more familiar with the details will chime in here with links to existing threads.





