**Exhibit31.1**

 

# **Officer’s Certification**

I, Chris A. Choate,Executive Vice President, Chief Financial Officer and Treasurer of AmeriCreditFinancial Services, Inc. (“AmeriCredit”), certify that:

 
| 1.     |   | I have reviewed this annual report on Form 10-K, and  all reports on Form 8-K containing distribution or servicing reports filed in  respect of periods included in the year covered by this annual report, of  AmeriCredit Automobile Receivables Trust 2005-1;                                                                                                                                                               |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 2.     |   | Based on my knowledge, the information in these reports,  taken as a whole, does not contain any untrue statement of a material fact or  omit to state a material fact necessary to make the statements made, in light  of the circumstances under which such statements were made, not misleading as  of the last day of the period covered by this annual report;                                                            |
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 3.     |   | Based on my knowledge, the servicing information  required to be provided to the trustee by the servicer under the sale and  servicing agreement for inclusion in these reports is included in these  reports;                                                                                                                                                                                                                 |
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 4.     |   | I am responsible for reviewing the activities  performed by the servicer under the sale and servicing agreement and based  upon my knowledge and the review required under the sale and servicing  agreement, and except as disclosed in the report, the servicer has fulfilled  its obligations under the sale and servicing agreement; and                                                                                   |
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 5.     |   | The reports disclose all significant deficiencies  relating to the servicer’s compliance with the minimum servicing standards  based upon the report provided by an independent public accountant, after  conducting a review in compliance with the Uniform Single Attestation Program  for Mortgage Bankers or similar procedure, as set forth in the sale and  servicing agreement, that is included in these reports. |

 
| Date: | February  28, 2006 |   |   |   |   |
|-------|--------------------|--------|--------|--------|--------|

 

| /s/ Chris A. Choate                    |
|----------------------------------------|
| Chris A. Choate                        |
| Executive Vice  President,             |
| Chief Financial Officer  and Treasurer |
|                                   |
|                                   |

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