[radec]

Found tabs broken. Spray arm would not rotate. Got new part. It is threaded on bottom but my old piece won't budge. How do I remove and replace this?

[PS Staff - Sheila]

It should unscrew.

You may have to use some force to get it off.

Here is a link to your dishwasher model GSDL122F00BB.

[denman]

try TIGHTENING it
A lot of arms are left hand tread