How do you remove the stem valve on an old Price Pfister single knob shower assembly?

Assuming it's a single knob push-pull, Price Pfister S74-292 "Avante" which I believe is the only one Price Pfister made/makes:

1. Turn off water supply.

2. Remove button, screw and knob.

3. Remove wall flange and sleeve.

4. Unscrew threaded chrome collar with an adjustable wrench.

5. Note position of cartridge tab - up or down - for inserting replacement.

6. Grab the stem with Channel Lock pliers and pull it out.