2004 silverado trannny code

Engine light is on I keep getting a code for shift silenoide electrical A.
i erease it and it keeps coming back.

If it helps i change the tranny oil and filter.

so is probably something i did. but the thing is the the light came on days after i did the change and not immediatly

any ideas...?

do the codes happen to be p0753 or p0751?