Filed under Rule 424(b)(2), Registration Statement No. 333-183535
Preliminary Pricing Supplement No 15 - Dated Monday, March 25, 2013 (To: Prospectus dated August 24, 2012)
| CUSIP | Principal | Selling | Gross | Net | Coupon | Coupon | Coupon | Maturity | 1st Coupon | 1st Coupon | Survivor's | Product |
| Number | Amount | Price | Concession | Proceeds | Type | Rate | Frequency | Date | Date | Amount | Option | Ranking |
| 02006DBH3 | [] | 100.000% | 0.750% | [] | Fixed | 2.250% | Monthly | 04/15/2015 | 05/15/2013 | $2.56 | No | Senior Unsecured Notes |
| Redemption Information: Callable at 100% on 4/15/2014 and Monthly thereafter with 30 Calendar Days Notice. | ||||||||||||
| 02006DBJ9 | [] | 100.000% | 1.300% | [] | Fixed | 3.150% | Monthly | 04/15/2017 | 05/15/2013 | $3.59 | No | Senior Unsecured Notes |
| Redemption Information: Callable at 100% on 4/15/2014 and Monthly thereafter with 30 Calendar Days Notice. | ||||||||||||
| Ally Financial Inc. | Offering Date: Monday, March 25, 2013 through Monday, April 1, 2013 | Ally Financial Inc. |
| Trade Date: Monday, April 1, 2013 @ 12:00 PM ET | Ally Financial Term Notes, Series A | |
Prospectus dated August 24, 2012 | ||
| Settle Date: Thursday, April 4, 2013 | ||
| Minimum Denomination/Increments:$1,000.00/$1,000.00 | ||
| Initial trades settle flat and clear SDFS: DTC Book Entry only | ||
| DTC Number 0235 via RBC Dain Rauscher Inc | ||
| Agents: Incapital, LLC, Citigroup, RBC Capital Markets, Morgan Stanley, J.P. Morgan | ||
| If the maturity date or an interest payment date for any note is not a business day (as term is defined in prospectus), principal, premium, if any, and interest for that note is paid on the next business day, and no interest will accrue from, and after, the maturity date or interest payment date. |