AlxJ64
Rust is Paint
How many miles were on your '19 when it died? Any warnings? I have 33k on my '20 and its VIN is in the list of 222k trucks that are on the list of needing the pump. I got the letter in the mail yesterday actually, and it just said it "could" happen and that there is no fix yet, even though the internet makes it sound like they're doing what you said and putting the '21 up pumps in them.It was something along the lines of needing more pressure/flow with the other updates for 19. Somewhere in 20, they updated from asymmetric lobes to symmetrical lobes within the CP4. For 21, a CP3 variant was brought back.
When the CP4 died on my 19 last summer, the newer version was the replacement. Now there is a recall that’s awaiting parts supply. Sounds like an adapter ring and the CP3 variant.