Since its inception in 1935 the Primesource Credit Union has been serving its members in the SPOKANE, Washington area with exceptional financial products. You can find their current interest rates on used car loans, new car loans, 1st mortgage loans and interest rates on both fixed and adjustable mortgages here on these pages. Currently led by Margaret Burkholz, the Primesource CU has grown its membership to over 6,720 with assets of more than $73,472,151. They have a main office and 3 branch offices.