##### 



Exhibit 99.1
 CAPITAL
AUTO RECEIVABLES ASSET TRUST 2005-SN1
Aggregate Annual Servicing Report
 DATESCollection Period
    
    March 2005 - December 2005Determination Date
    
    Two LIBOR Business Days Prior to the closing date or distribution date.Distribution / Payment Date
    
    Fifteenth day of each calendar month, or if that day is not a business day, the next business day, beginning on May 16, 2005.
 SUMMARY
 
 Coupon Rate
    
    Initial Balance
    
    Beginning Balance
    
    Ending BalanceSeries 2005-SN1 Lease Assets (Total Pool Balance)
    
    
    
    
    
    
    2,294,964,249.60
    
    
    
    2,294,964,249.60
    
    
    
    1,648,429,888.76Aggregate ABS Value of the Series 2005-SN1 Lease Assets
    
    
    
    
    
    
    2,000,005,298.81
    
    
    
    2,000,005,298.81
    
    
    
    1,489,876,279.68COLT 2005-SN1 Secured Notes
    
    
    5.370
    %
    
    
    1,970,002,649.40
    
    
    
    1,970,002,649.40
    
    
    
    1,459,873,630.27Discount Rate
    
    
    8.500
    %
 EndingCoupon Rate
    
    Initial Balance
    
    
    Beginning Balance
    
    
    Ending Balance
    
    
    Pool FactorCARAT Class A-1
    
    3.327%
    
    
    440,000,000.00
    
    
    
    440,000,000.00
    
    
    
    
    
    
    0.0000000CARAT Class A-2a
    
    3.850%
    
    
    185,000,000.00
    
    
    
    185,000,000.00
    
    
    
    164,006,685.22
    
    
    0.8865226CARAT Class A-2b
    
    One-Month LIBOR +.080%
    
    
    329,000,000.00
    
    
    
    329,000,000.00
    
    
    
    291,665,942.89
    
    
    0.8865226CARAT Class A-2c
    
    One-Month LIBOR +         .080%
    
    
    104,000,000.00
    
    
    
    104,000,000.00
    
    
    
    92,198,352.76
    
    
    0.8865226CARAT Class A-3a
    
    4.100%
    
    
    160,000,000.00
    
    
    
    160,000,000.00
    
    
    
    160,000,000.00
    
    
    1.0000000CARAT Class A-3b
    
    One-Month LIBOR + .100%
    
    
    315,000,000.00
    
    
    
    315,000,000.00
    
    
    
    315,000,000.00
    
    
    1.0000000CARAT Class A-3c
    
    One-Month LIBOR +.100%
    
    
    36,000,000.00
    
    
    
    36,000,000.00
    
    
    
    36,000,000.00
    
    
    1.0000000CARAT Class A-4
    
    One-Month LIBOR + .150%
    
    
    221,000,000.00
    
    
    
    221,000,000.00
    
    
    
    221,000,000.00
    
    
    1.0000000CARAT Class B-1
    
    4.830%
    
    
    10,000,000.00
    
    
    
    10,000,000.00
    
    
    
    10,000,000.00
    
    
    1.0000000CARAT Class B-2
    
    One-Month LIBOR + .750%
    
    
    70,000,000.00
    
    
    
    70,000,000.00
    
    
    
    70,000,000.00
    
    
    1.0000000CARAT Class C
    
    One-Month LIBOR +1.250%
    
    
    70,000,000.00
    
    
    
    70,000,000.00
    
    
    
    70,000,000.00
    
    
    1.0000000CARAT 2005-SN1
    
    
    
    
    1,940,000,000.00
    
    
    
    1,940,000,000.00
    
    
    
    1,429,870,980.87
    
    
    0.7370469CARAT Certificates
    
    
    
    
    30,002,649.40
    
    
    
    30,002,649.40
    
    
    
    30,002,649.40
    
    
    1.0000000COLT Overcollateralization
    
    
    
    
    30,002,649.41
    
    
    
    30,002,649.41
    
    
    
    30,002,649.41
    
    
    1.0000000Total
    
    
    
    
    2,000,005,298.81
    
    
    
    2,000,005,298.81
    
    
    
    1,489,876,279.68
    
    
    0.7449362
 March April LIBOR 3.06May LIBOR 3.09June LIBOR 3.22July LIBOR 3.38813August LIBOR 3.57125September LIBOR 3.76813October LIBOR 3.97November LIBOR 4.12December LIBOR 4.36938
 Principal
    
    
    Interest
    
    
    Principal per $1000
    
    Interest per $1000Payment Due
    
    
    Payment Due
    
    
    Face Amount
    
    Face AmountClass A-1
    
    
    440,000,000.00
    
    
    
    4,825,523.39
    
    
    1000.0000000
    
    
    10.9670986Class A-2a
    
    
    20,993,314.78
    
    
    
    5,068,822.00
    
    
    113.4773772
    
    
    27.3990378Class A-2b
    
    
    37,334,057.11
    
    
    
    8,963,596.99
    
    
    113.4773772
    
    
    27.2449757Class A-2c
    
    
    11,801,647.24
    
    
    
    2,833,477.46
    
    
    113.4773773
    
    
    27.2449756Class A-3a
    
    
    
    
    
    
    4,683,111.14
    
    
    0.0000000
    
    
    29.2694446Class A-3b
    
    
    
    
    
    
    8,662,679.20
    
    
    0.0000000
    
    
    27.5005689Class A-3c
    
    
    
    
    
    
    990,020.48
    
    
    0.0000000
    
    
    27.5005689Class A-4
    
    
    
    
    
    
    6,158,659.07
    
    
    0.0000000
    
    
    27.8672356Class B-1
    
    
    
    
    
    
    344,808.33
    
    
    0.0000000
    
    
    34.4808330Class B-2
    
    
    
    
    
    
    2,258,706.49
    
    
    0.0000000
    
    
    32.2672356Class C
    
    
    
    
    
    
    2,515,373.16
    
    
    0.0000000
    
    
    35.9339023Total
    
    
    510,129,019.13
    
    
    
    47,304,777.71
    
    
    262.9531026
    
    
    24.3839060COLT 2005-SN1 Secured Notes
    
    
    510,129,019.13
    
    
    
    66,495,865.39
    
    
    258.9483924
    
    
    33.7542010
 COLTI. COLLECTIONSActual Lease Payments Received
    
    
    356,600,513.64Repurchased Contracts
    
    
    13,913,935.66Sale Proceeds  Early Terminations (Defaults)
    
    
    8,854,001.22Pull Ahead Payments  Actual
    
    
    5,163,322.09Sale Proceeds  Scheduled Terminations
    
    
    254,317,921.96Excess Wear and Excess Mileage Received
    
    
    1,245,084.25Other Recoveries Received
    
    
    2,879,819.04Payment Advance for Current Period
    
    
    25,999,891.41Residual Advance for Current Period
    
    
    45,535.30Pull Ahead Payment Advance
    
    
    7,179,563.15Prior Period Payment Ahead Applied to Current Period
    
    
    6,867,751.57COLT 2005-SN1 Reserve Account Draw
    
    
    2,473,548.28Total Collections
    
    
    685,540,887.57
 II. DISTRIBUTIONSTotal Collections
    
    
    685,540,887.57Less: Reimbursement of Payment Advance
    
    
    24,906,270.42Less: Reimbursement of Residual Advance
    
    
    Less: Reimbursement of Pull Ahead Payment Advance
    
    
    6,837,485.97Less: Current Period Payment Ahead Received
    
    
    9,655,591.21Less: COLT Servicing Fee
    
    
    14,931,201.22Less: Secured Note Interest Distributable Amount
    
    
    66,495,865.39Less: Secured Note Principal Distributable Amount
    
    
    510,129,019.13Less: COLT 2005-SN1 Reserve Account Deposit
    
    
    28,647,660.11Less: Excess to CARAT Following a CARAT Indenture Event of Default
    
    
    Less: COLT Additional Servicing Fee
    
    
    9,989,598.97Excess to be Released to COLT, LLC
    
    
    13,948,195.15Memo: Excess Incl. Reimbursement of Advances Released to COLT, LLC
    
    
    45,691,951.54
 1




---



##### 



CARRYOVER
SHORTFALLSecured Note Principal Carryover Shortfall
    
    
    
 CARATI. COLLECTIONSSecured Note Interest Distributable Amount
    
    
    66,495,865.39Secured Note Principal Distributable Amount
    
    
    510,129,019.13Excess from COLT Following a CARAT Indenture Event of Default
    
    
    CARAT Reserve Account Draw
    
    
    Total Collections
    
    
    576,624,884.52
 II. DISTRIBUTIONSTotal Collections
    
    
    576,624,884.52Plus: Net Amount Due From Swap Counterparty
    
    
    1,011,869.14Less: CARAT Servicing Fee
    
    
    146,811.79Less: Net Amount Due to Swap Counterparty
    
    
    2,489,926.59Less: Noteholders Interest Distributable Amount
    
    
    47,304,777.71Less: Swap Termination Payment
    
    
    Less: Noteholders Principal Distributable Amount
    
    
    510,129,019.13Less: 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)
    
    
    17,566,218.44
 RECONCILIATION OF ADVANCES AND PAYMENT AHEAD ACCOUNTBeginning Balance of Payment Advance
    
    
    7,132,131.06Less: Reimbursement of Outstanding Payment Advance
    
    
    24,906,270.42Plus: Current Period Payment Advances
    
    
    25,999,891.41Ending Balance of Payment Advance
    
    
    8,225,752.05Beginning Balance of Residual Advance
    
    
    Less: Reimbursement of Outstanding Residual Advance
    
    
    Plus: Current Period Residual Advances
    
    
    45,535.30Ending Balance of Residual Advance
    
    
    45,535.30Beginning Balance of Pull Ahead Payment Advance
    
    
    Less: Reimbursement of Outstanding Pull Ahead Payment Advance
    
    
    6,837,485.97Plus: Current Period Pull Ahead Payment Advances
    
    
    7,179,563.15Ending Balance of Pull Ahead Payment Advance
    
    
    342,077.18Beginning Balance of Payment Ahead Account
    
    
    71,283.28Less: Prior Period Payment Ahead Applied to Current Period
    
    
    6,867,751.57Plus: Current Period Payment Ahead Received
    
    
    9,655,591.21Ending Balance of Payment Ahead Account
    
    
    2,859,122.92
 COLT 2005-SN1 RESERVE ACCOUNTInitial Reserve Account Balance
    
    
    125,000,331.18Reserve Account Required Amount
    
    
    151,174,443.01Beginning Reserve Account Balance
    
    
    125,000,331.18Plus: Excess Available
    
    
    28,647,660.11Less: Reserve Account Draw Amount to Noteholders
    
    
    Less: Reserve Account Draw Amount to Certificateholders
    
    
    Less: Excess Reserve Account Funds to COLT, LLC
    
    
    2,473,548.28Ending COLT 2005-SN1 Reserve Account Balance
    
    
    151,174,443.01
 DELINQUENCIES*
 
 April# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,134
    
    
    
    21,461,631.3261-90 Days Delinquent
    
    
    128
    
    
    
    2,363,190.00Over 90 Days Delinquent
    
    
    3
    
    
    
    57,168.05Total
    
    
    1,265
    
    
    
    23,881,989.37
 May# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,656
    
    
    
    30,601,005.1361-90 Days Delinquent
    
    
    184
    
    
    
    3,409,899.45Over 90 Days Delinquent
    
    
    48
    
    
    
    817,278.37Total
    
    
    1,888
    
    
    
    34,828,182.95
 June# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,869
    
    
    
    32,604,813.3761-90 Days Delinquent
    
    
    279
    
    
    
    5,005,298.58Over 90 Days Delinquent
    
    
    101
    
    
    
    1,921,740.49Total
    
    
    2,249
    
    
    
    39,531,852.44
 July# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,926
    
    
    
    34,436,869.6761-90 Days Delinquent
    
    
    344
    
    
    
    5,886,005.55Over 90 Days Delinquent
    
    
    168
    
    
    
    3,096,168.76Total
    
    
    2,438
    
    
    
    43,419,070.98
 2




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##### 



August# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,529
    
    
    
    27,520,512.1961-90 Days Delinquent
    
    
    249
    
    
    
    4,527,587.84Over 90 Days Delinquent
    
    
    184
    
    
    
    3,298,409.43Total
    
    
    1,962
    
    
    
    35,346,509.46
 September*# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,915
    
    
    
    32,017,581.2561-90 Days Delinquent
    
    
    258
    
    
    
    4,554,715.22Over 90 Days Delinquent
    
    
    240
    
    
    
    4,391,294.40Total
    
    
    2,413
    
    
    
    40,963,590.87
 October *# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,904
    
    
    
    32,863,251.6661-90 Days Delinquent
    
    
    370
    
    
    
    6,309,984.19Over 90 Days Delinquent
    
    
    237
    
    
    
    4,444,752.44Total
    
    
    2,511
    
    
    
    43,617,988.29
 November *# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    1,760
    
    
    
    30,017,036.0161-90 Days Delinquent
    
    
    350
    
    
    
    5,967,898.43Over 90 Days Delinquent
    
    
    299
    
    
    
    5,377,778.25Total
    
    
    2,409
    
    
    
    41,362,712.69
 December *# of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    2,175
    
    
    
    36,078,933.8061-90 Days Delinquent
    
    
    371
    
    
    
    6,243,078.16Over 90 Days Delinquent
    
    
    295
    
    
    
    5,411,395.59Total
    
    
    2,841
    
    
    
    47,733,407.55
  September*Hurricane Delinquent Receivables
    
    # of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    7
    
    
    
    79,966.0061-90 Days Delinquent
    
    
    1
    
    
    
    14,269.00Over 90 Days Delinquent
    
    
    
    
    
    
    Total
    
    
    8
    
    
    
    94,235.00
 October *Hurricane Delinquent Receivables
    
    # of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    7
    
    
    
    163,033.0061-90 Days Delinquent
    
    
    2
    
    
    
    53,408.00Over 90 Days Delinquent
    
    
    
    
    
    
    Total
    
    
    9
    
    
    
    216,441.00
 November *Hurricane Delinquent Receivables
    
    # of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    7
    
    
    
    136,674.4261-90 Days Delinquent
    
    
    1
    
    
    
    28,752.79Over 90 Days Delinquent
    
    
    1
    
    
    
    23,881.38Total
    
    
    9
    
    
    
    189,308.59
 December *Hurricane Delinquent Receivables
    
    # of Contracts
    
    
    Amount31-60 Days Delinquent
    
    
    4
    
    
    
    80,994.4461-90 Days Delinquent
    
    
    2
    
    
    
    15,863.08Over 90 Days Delinquent
    
    
    4
    
    
    
    103,720.32Total
    
    
    10
    
    
    
    200,577.84
 NET LOSSES ON EARLY TERM DEFAULTSAggregate ABS Value of Early Term Defaults
    
    
    11,374,692.30Less: Aggregate Sales Proceeds
    
    
    8,854,001.22Less: Excess Wear and Excess Mileage Received
    
    
    278.34Less: Other Recoveries
    
    
    177,501.36Current Period Net Losses on Early Term Defaults
    
    
    2,342,911.38Beginning Cumulative Net Losses on Early Term Defaults
    
    
    Current Period Net Losses
    
    
    2,342,911.38Ending Cumulative Net Losses on Early Term Defaults
    
    
    2,342,911.38
 NET LOSSES/(GAINS) ON RETURNED VEHICLES SOLD BY GMACAggregate ABS Value of Returned Vehicles Sold by GMAC
    
    
    243,972,934.38Add: Reimbursement of Outstanding Residual Advance
    
    
    Less: Aggregate Sales Proceeds
    
    
    254,317,921.96Less: Pull Ahead Payments
    
    
    5,163,322.09Less: Excess Wear and Excess Mileage Received
    
    
    1,244,805.91Less: Other Recoveries
    
    
    2,702,317.68Current Period Net Losses/(Gains) on Returned Vehicles Sold by GMAC
    
    
    (19,455,433.26
    )Beginning Cumulative Net Losses/(Gains) on Returned Vehicles Sold by GMAC
    
    
    Current Period Net Losses/(Gains)
    
    
    (19,455,433.26
    )Ending Cumulative Net Losses/(Gains) on Returned Vehicles Sold by GMAC
    
    
    (19,455,433.26
    )
 3




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##### 



POOL STATISTICS
 
 Initial
    
    
    March/April
    
    
    May
    
    
    June
    
    
    JulyNumber of Contracts
    
    
    99,081
    
    
    
    98,068
    
    
    
    96,245
    
    
    
    94,320
    
    
    
    92,656Discount Rate
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %Weighted Average Coupon
    
    
    4.451
    %
    
    
    4.452
    %
    
    
    4.452
    %
    
    
    4.451
    %
    
    
    4.451
    %Weighted Average Original Term
    
    
    39.16
    
    
    
    39.15
    
    
    
    39.20
    
    
    
    39.25
    
    
    
    39.30Weighted Average Remaining Term
    
    
    26.93
    
    
    
    25.03
    
    
    
    24.28
    
    
    
    23.52
    
    
    
    22.72
 August
    
    
    September
    
    
    October
    
    
    November
    
    
    DecemberNumber of Contracts
    
    
    90,637
    
    
    
    88,509
    
    
    
    86,168
    
    
    
    83,610
    
    
    
    81,435Discount Rate
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %
    
    
    8.500
    %Weighted Average Coupon
    
    
    4.452
    %
    
    
    4.453
    %
    
    
    4.452
    %
    
    
    4.453
    %
    
    
    4.454
    %Weighted Average Original Term
    
    
    39.35
    
    
    
    39.41
    
    
    
    39.49
    
    
    
    39.60
    
    
    
    39.68Weighted Average Remaining Term
    
    
    21.97
    
    
    
    21.24
    
    
    
    20.55
    
    
    
    19.91
    
    
    
    19.19
 Number of Units Terminated during the Month
    
    March/April
    
    
    May
    
    
    June
    
    
    JulyScheduled Terminated
    
    
    846
    
    
    
    743
    
    
    
    1,341
    
    
    
    1,345Pull Ahead
    
    
    48
    
    
    
    1,019
    
    
    
    473
    
    
    
    211Early Terminations Not Pull Ahead Not Default
    
    
    113
    
    
    
    31
    
    
    
    59
    
    
    
    59Early Terminations Default
    
    
    6
    
    
    
    30
    
    
    
    52
    
    
    
    491,013
    
    
    
    1,823
    
    
    
    1,925
    
    
    
    1,664
 Number of Units Terminated during the Month
    
    August
    
    
    September
    
    
    October
    
    
    November
    
    
    DecemberScheduled Terminated
    
    
    1,169
    
    
    
    1,631
    
    
    
    1,886
    
    
    
    1,834
    
    
    
    1,853Pull Ahead
    
    
    686
    
    
    
    357
    
    
    
    273
    
    
    
    546
    
    
    
    96Early Terminations Not Pull Ahead Not Default
    
    
    70
    
    
    
    78
    
    
    
    77
    
    
    
    92
    
    
    
    71Early Terminations Default
    
    
    94
    
    
    
    62
    
    
    
    105
    
    
    
    86
    
    
    
    1552,019
    
    
    
    2,128
    
    
    
    2,341
    
    
    
    2,558
    
    
    
    2,175
 
 Prepayment Rate
 
 Month
    
    Prepayment Rate1
    
    
    0.412
    
    
    0.563
    
    
    1.474
    
    
    1.445
    
    
    1.256
    
    
    0.737
    
    
    0.388
    
    
    0.409
    
    
    0.3810
    
    
    0.00
 4