<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED INCOME STATEMENT OF GATX AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                              82
<SECURITIES>                                         0
<RECEIVABLES>                                    1,107
<ALLOWANCES>                                       142<F1>
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0<F2>
<PP&E>                                           4,944
<DEPRECIATION>                                   1,997
<TOTAL-ASSETS>                                   5,223
<CURRENT-LIABILITIES>                                0<F2>
<BONDS>                                          2,888<F3>
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            34
<OTHER-SE>                                         767
<TOTAL-LIABILITY-AND-EQUITY>                     5,223
<SALES>                                              0
<TOTAL-REVENUES>                                   886
<CGS>                                                0
<TOTAL-COSTS>                                      416<F4>
<OTHER-EXPENSES>                                   141<F5>
<LOSS-PROVISION>                                     6
<INTEREST-EXPENSE>                                 112
<INCOME-PRETAX>                                     87<F6>
<INCOME-TAX>                                        36
<INCOME-CONTINUING>                                 77
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                        77
<EPS-BASIC>                                       1.56
<EPS-DILUTED>                                     1.53
<FN>
<F1>RECEIVABLES CONSIST OF THREE COMPONENTS: TRADE ACCOUNTS OF 131 MILLION,
FINANCIAL LEASES OF 651 MILLION, AND SECURED LOANS OF 325 MILLION.
<F2>NOT APPLICABLE BECAUSE GATX HAS AN UNCLASSIFIED BALANCE SHEET.
<F3>BONDS CONSIST OF THREE COMPONENTS: RECOURSE LONG-TERM DEBT OF 2,265 MILLION
NONRECOURSE LONG-TERM DEBT OF 435 MILLION AND CAPITAL LEASE OBLIGATIONS OF 188
MILLION.
<F4>THIS VALUE REPRESENTS OPERATING EXPENSES ON THE CONSOLIDATED STATEMENTS OF
INCOME
<F5>THIS VALUE REPRESENTS THE PROVISION FOR DEPRECIATION AND AMORTIZATION ON THE
CONSOLIDATED STATEMENTS OF INCOME
<F6>THIS VALUE REPRESENTS INCOME BEFORE INCOME TAXES AND SHARE OF AFFILIATES'
EARNINGS.
</FN>