2002 Cadillac Seville Expansion Tank
Dorman Expansion Tank
Part Number: 2920-05317211
Notes: Engine Coolant Recovery Tank
AC Delco Expansion Tank
Part Number: 2920-05418431
Notes: GM Original Equipment -- INCLS LOW COOLANT SWITCH
Best price, slow product delivery. If your only ride is down, slow delivery does not really work.
I easily found this part on Parts Geek web site. Price was very good. Received part in one week, with Thanksgiving weekend in that week.
Part came quickly and packaged well. Prices seem to be set pretty well. I would buy from partsgeek.com again.