EXHIBIT 20
**Capital Auto Receivables Asset Trust 2005-SN1Monthly Servicing Report**                   **DATES**                   Collection Period Oct-05                Determination Date 11/11/2005                Distribution / Payment Date 11/15/2005                                   **SUMMARY**                     **Coupon Rate** **Initial Balance** **Beginning Balance** **Ending Balance**                   Series 2005-SN1 Lease Assets (Total Pool Balance)    2,294,964,249.60   1,856,231,682.07   1,785,871,735.84     Aggregate ABS Value of the Series 2005-SN1 Lease Assets    2,000,005,298.81   1,661,469,727.68   1,603,731,802.23     COLT 2005-SN1 Secured Notes 5.370%  1,970,002,649.40   1,631,467,078.27   1,573,729,152.82                                        **Ending**  **Coupon Rate** **Initial Balance** **Beginning Balance** **Ending Balance** **Pool Factor**              CARAT Class A-1 3.327%  440,000,000.00   101,464,428.87   43,726,503.42   0.0993784 CARAT Class A-2a 3.850%  185,000,000.00   185,000,000.00   185,000,000.00   1.0000000 CARAT Class A-2b One-Month LIBOR + .080%  329,000,000.00   329,000,000.00   329,000,000.00   1.0000000 CARAT Class A-2c One-Month LIBOR + .080%  104,000,000.00   104,000,000.00   104,000,000.00   1.0000000 CARAT Class A-3a 4.100%  160,000,000.00   160,000,000.00   160,000,000.00   1.0000000 CARAT Class A-3b One-Month LIBOR + .100%  315,000,000.00   315,000,000.00   315,000,000.00   1.0000000 CARAT Class A-3c One-Month LIBOR + .100%  36,000,000.00   36,000,000.00   36,000,000.00   1.0000000 CARAT Class A-4 One-Month LIBOR + .150%  221,000,000.00   221,000,000.00   221,000,000.00   1.0000000 CARAT Class B-1 4.830%  10,000,000.00   10,000,000.00   10,000,000.00   1.0000000 CARAT Class B-2 One-Month LIBOR + .750%  70,000,000.00   70,000,000.00   70,000,000.00   1.0000000 CARAT Class C One-Month LIBOR + 1.250%  70,000,000.00   70,000,000.00   70,000,000.00   1.0000000                CARAT 2005-SN1    1,940,000,000.00   1,601,464,428.87   1,543,726,503.42   0.7957353 CARAT Certificates    30,002,649.40   30,002,649.40   30,002,649.41   1.0000000 COLT Overcollateralization    30,002,649.41   30,002,649.41   30,002,649.40   1.0000000                **Total**    2,000,005,298.81   1,661,469,727.68   1,603,731,802.23   0.8018638                                   LIBOR3.97 **Principal** **Interest** **Principal per $1000** **Interest per $1000**      **Payment Due** **Payment Due** **Face Amount** **Face Amount**                   Class A-1 57,737,925.45  271,933.12   131.2225578   0.6180298     Class A-2a –  593,541.67   0.0000000   3.2083333     Class A-2b –  1,073,362.50   0.0000000   3.2625000     Class A-2c –  339,300.00   0.0000000   3.2625000     Class A-3a –  546,666.67   0.0000000   3.4166667     Class A-3b –  1,032,762.50   0.0000000   3.2786111     Class A-3c –  118,030.00   0.0000000   3.2786111     Class A-4 –  733,474.44   0.0000000   3.3188889     Class B-1 –  40,250.00   0.0000000   4.0250000     Class B-2 –  266,155.56   0.0000000   3.8022222     Class C –  294,350.00   0.0000000   4.2050000                    **Total** 57,737,925.45  5,309,826.46   29.7618172   2.7370239                                       **COLT 2005-SN1 Secured Notes** 57,737,925.45  7,300,815.18   29.3085522   3.7059926     

 

**Capital Auto Receivables Asset Trust 2005-SN1Monthly Servicing Report**     **COLT**    **I. Collections**         Actual Lease Payments Received  33,945,485.37 Repurchased Contracts  1,478,562.07 SaleProceeds - Early Terminations (Defaults)  1,371,496.18 Pull AheadPayments - Actual  356,029.67 SaleProceeds - Scheduled Terminations  31,655,015.66 Excess Wear and Excess Mileage Received  203,301.89 Other Recoveries Received  413,755.94 Payment Advance for Current Period  2,185,015.47 Residual Advance for Current Period  — Pull Ahead Payment Advance  842,005.73 Prior Period Payment Ahead Applied to Current Period  792,265.11 COLT 2005-SN1 Reserve Account Draw  433,034.44     **Total Collections**  73,675,967.53          **II. Distributions**         Total Collections  73,675,967.53 Less: Reimbursement of Payment Advance  2,502,214.10 Less: Reimbursement of Residual Advance  — Less: Reimbursement of Pull Ahead Payment Advance  865,728.30 Less: Current Period Payment Ahead Received  924,333.52 Less: COLT Servicing Fee  1,384,558.11 Less: Secured Note Interest Distributable Amount  7,300,815.18 Less: Secured Note Principal Distributable Amount  57,737,925.45 Less: COLT 2005-SN1 Reserve Account Deposit  — Less: Excess to CARAT Following a CARAT Indenture Event of Default  — Less: COLT Additional Servicing Fee  1,384,558.11     **Excess to be Released to COLT, LLC**  1,575,834.76          Memo: Excess Incl. Reimbursement of Advances Released to COLT, LLC  4,943,777.16          **Carryover Shortfall**        Secured Note Principal Carryover Shortfall  —     
 

 

**Capital Auto Receivables Asset Trust 2005-SN1Monthly Servicing Report**     **CARAT**    **I. Collections**         Secured Note Interest Distributable Amount  7,300,815.18 Secured Note Principal Distributable Amount  57,737,925.45 Excess from COLT Following a CARAT Indenture Event of Default  — CARAT Reserve Account Draw  —     **Total Collections**  65,038,740.63          **II. Distributions**         Total Collections  65,038,740.63 Plus: Net Amount Due From Swap Counterparty  192,596.68 Less: CARAT Servicing Fee  13,595.56 Less: Net Amount Due to Swap Counterparty    Less: Noteholders’ Interest Distributable Amount  5,309,826.46 Less: Swap Termination Payment  — Less: Noteholders’ Principal Distributable Amount  57,737,925.45 Less: CARAT Reserve Account Deposit  — Less: Swap Termination Payment (to extent not paid above)  — Less: Certificateholders’ Principal Distributable Amount  —     **Excess to the Reserve Account (to be released to CARI)**  2,169,989.84          **Reconciliation of Advances and Payment Ahead Account**         Beginning Balance of Payment Advance  7,595,390.93 Less: Reimbursement of Outstanding Payment Advance  2,502,214.10 Plus: Current Period Payment Advances  2,185,015.47     Ending Balance of Payment Advance  7,278,192.30          Beginning Balance of Residual Advance  — Less: Reimbursement of Outstanding Residual Advance  — Plus: Current Period Residual Advances  —     Ending Balance of Residual Advance  —          Beginning Balance of Pull Ahead Payment Advance  1,033,041.42 Less: Reimbursement of Outstanding Pull Ahead Payment Advance  865,728.30 Plus: Current Period Pull Ahead Payment Advances  842,005.73     Ending Balance of Pull Ahead Payment Advance  1,009,318.85          Beginning Balance of Payment Ahead Account  2,898,712.74 Less: Prior Period Payment Ahead Applied to Current Period  792,265.11 Plus: Current Period Payment Ahead Received  924,333.52     Ending Balance of Payment Ahead Account  3,030,781.15     
 

 

**Capital Auto Receivables Asset Trust 2005-SN1Monthly Servicing Report**     **COLT 2005-SN1 RESERVE ACCOUNT**         Initial Reserve Account Balance  125,000,331.18 ReserveAccount-Required Amount  152,028,359.43 Beginning Reserve Account Balance  152,461,393.87 Plus: Excess Available  — Less: Reserve Account Draw Amount to Noteholders  — Less: Reserve Account Draw Amount to Certificateholders  — Less: Excess Reserve Account Funds to COLT, LLC  433,034.44     **Ending COLT 2005-SN1 Reserve Account Balance**  152,028,359.43     
**DELINQUENCIES**