In case anyone needs this info, this will be in the archives.
GPI makes the pump system. Model EZ-8RV. 12 volts DC. 2100 RPM. 1/10 HP. 11 amps.
Mine is failing when the air temperature gets above 80 degrees. Some have said the plastic gears go bad, swell up. Makes sense... in the morning when it's cool, the pump works fine.
Anyway, there you go. The more you know, the better. You can probably just go look at yours... but I had to have the photo sent to me from the storage facility where the trailer is stored, an hour's drive from home. Else, I wouldn't be bothering everyone with this info.