Swap Confirmation Sample Contracts

EXHIBIT 99.8 June 7, 2007 Citibank, N.A. Confirmations Unit 333 West 34th, 2nd Floor New York, NY 10001, USA Tel: (212) 615-8981 Fax: (212) 615-8985 RE: Confirmation of Primary Swap Relating to the Class A-4 Notes Transaction Reference Number: M072614...

Swap Confirmation • June 13th, 2007 • Capital Auto Receivables Asset Trust 2007-Sn1 • Asset-backed securities

• Contract Type
  Swap Confirmation
• Filed
  June 13th, 2007
• Company
  Capital Auto Receivables Asset Trust 2007-Sn1
• Industry
  Asset-backed securities

September 27, 2007

Swap Confirmation • October 2nd, 2007 • Capital Auto Receivables Asset Trust 2007-3 • Asset-backed securities

• Contract Type
  Swap Confirmation
• Filed
  October 2nd, 2007
• Company
  Capital Auto Receivables Asset Trust 2007-3
• Industry
  Asset-backed securities

The purpose of this letter agreement is to confirm the terms and conditions of the Swap Transaction (the “Primary Swap”) entered into between Credit Suisse International (the “Counterparty”) and Capital Auto Receivables Asset Trust 2007-3 (the “Trust”) as of the Trade Date listed below (the “Transaction”). This letter constitutes a “Confirmation” as referred to in the Primary ISDA Agreement specified below.

August 23, 2007

Swap Confirmation • August 28th, 2007 • Capital Auto Receivables Asset Trust 2007-2 • Asset-backed securities

• Contract Type
  Swap Confirmation
• Filed
  August 28th, 2007
• Company
  Capital Auto Receivables Asset Trust 2007-2
• Industry
  Asset-backed securities

The purpose of this letter agreement is to confirm the terms and conditions of the Swap Transaction (the “Primary Swap”) entered into between Citibank, N.A. (the “Counterparty”) and Capital Auto Receivables Asset Trust 2007-2 (the “Trust”) as of the Trade Date listed below (the “Transaction”). This letter constitutes a “Confirmation” as referred to in the Primary ISDA Agreement specified below.