<PAGE>
Filed under Rule 424(b)(3)
File No. 333-63153
SUPPLEMENT NO. 27 TO PROSPECTUS DATED SEPTEMBER 21, 1998
(AS SUPPLEMENTED SEPTEMBER 21, 1998)
PACCAR FINANCIAL CORP.
MEDIUM-TERM NOTES, SERIES I
PRINCIPAL AMOUNT: $45,000,000
ORIGINAL ISSUE DATE: 1/27/2000
MATURITY DATE: 1/28/2002
INITIAL INTEREST RATE: To be Determined
INTEREST RATE INDEX: 3-Month LIBOR
SPREAD: None
INDEX SOURCE: Telerate page 3750
INDEX RESET FREQUENCY: Quarterly on the 28th
INTEREST PAYMENT PERIOD: Quarterly
INTEREST PAYMENT DATES: Quarterly on the 28th Subject to Modified Business
Day Convention as Defined by ISDA
ISSUE PRICE: 99.7759%
PROCEEDS TO COMPANY: $44,899,155.00
COMMISSION/DISCOUNT: 0.2241%
DAY COUNT CONVENTION: Actual / 360
FORM OF NOTE (CHECK ONE): Book-Entry [ X ]
Certificate [ ]
AGENT/UNDERWRITER: Morgan Stanley Dean Witter, Inc.
DATED: JANUARY 24, 2000
The Agent/Underwriter, Morgan Stanley Dean Witter, Inc. has purchased the Notes
as principal and may resell the Notes at prices to be determined by such
Underwriter at the time of resale.
