##### 



Monthly Servicing Report
Capital Auto Receivables Asset Trust 2005-1
December 2005Distribution Date: 1/17/06 Original InputsTotal Pool Balance
    
$
    
    3,313,888,879.69Class A-1 Notes Balance
    
$
    
    550,000,000.00Class A-1 Notes Rate
    

    One Month LIBOR + 0.01
    %Class A-2a Notes Balance
    
$
    
    450,000,000.00Class A-2a Notes Rate
    

    One Month LIBOR + 0.04
    %Class A-2b Notes Balance
    
$
    
    250,000,000.00Class A-2b Notes Rate
    

    
    3.730
    %Class A-3 Notes Balance
    
$
    
    600,000,000.00Class A-3 Notes Rate
    

    One Month LIBOR + 0.06
    %Class A-4 Notes Balance
    
$
    
    760,000,000.00Class A-4 Notes Rate
    

    
    4.050
    %Class A-5 Notes Balance
    
$
    
    229,825,000.00Class A-5 Notes Rate
    

    One Month LIBOR + 0.10
    %Class B Notes Balance
    
$
    
    122,803,000.00Class B Notes Rate
    

    One Month LIBOR + 0.375
    %Class C Notes Balance
    
$
    
    46,051,000.00Class C Notes Rate
    

    
    4.730
    %Class D Notes Balance
    
$
    
    30,701,000.00Class D Notes Rate
    

    
    6.500
    %Overcollateralization
    
$
    
    30,701,224.17Reserve Account Deposit
    
$
    
    15,350,406.12Discount Rate
    

    
    7.50
    %Part I. CollectionsReceipts During the Period
    
$
    
    100,440,092.81Principal on Repurchased Contracts
    

    
    3,031,882.58Liquidation Proceeds (Recoveries)



2,056,875.01Schedule and Simple Interest Payments Advanced
    

    
    619,973.00Schedule Principal Advanced
    

    
    1,267,477.54Total
Collections Available For the Period
    
$
    
    107,416,300.94Beginning Pool Aggregate Principal Balance
    
$
    
    2,520,283,656.76Ending Pool Aggregate Principal Balance
    
$
    
    2,419,791,935.85Scheduled Principal Collection
    
$
    
    73,679,516.26Beginning Aggregate Discounted Principal Balance
    
$
    
    2,352,572,535.66Ending Aggregate Discounted Principal Balance
    
$
    
    2,261,612,942.70Part II. Distributions to Noteholders and CertificateholdersTotal Collections
    
$
    
    107,416,300.94Plus: Reserve Account Draw
    

    
    Plus: Net Amount Due From Swap Counterparty
    

    
    760,485.67Less: Total Servicing Fee
    

    
    4,200,472.76Less: Net Amount Due to Swap Counterparty
    

    
    Less: Monthly Interest Due to Noteholders
    

    
    8,799,369.18Less: Principal Due to Noteholders
    

    
    90,959,592.96Less: Reserve Account Deposit
    

    
    Less: Accumulation Account Deposit
    

    
    Equals Reserve Fund Excess to be released to CARI
    
$
    
    4,217,351.71
 Page 1




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##### 



Monthly Servicing Report
Capital Auto Receivables Asset Trust 2005-1
December 2005Distribution Date: 1/17/06 Per $1000 ofOriginal PrincipalClass A-1 Notes Distributable AmountMonthly Interest
    
    $
    
    
    
    
    Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    Class A-2a Notes Distributable AmountMonthly Interest
    
    $
    1,383,617.25
    
    
    
    3.074705Monthly Principal
    
    
    58,474,024.05
    
    
    
    129.942276Distributable Amount
    
    $
    59,857,641.30Class A-2b Notes Distributable AmountMonthly Interest
    
    $
    591,128.75
    
    
    
    2.364515Monthly Principal
    
    
    32,485,568.91
    
    
    
    129.942276Distributable Amount
    
    $
    33,076,697.66Class A-3 Notes Distributable AmountMonthly Interest
    
    $
    2,436,159.00
    
    
    
    4.060265Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    2,436,159.00Class A-4 Notes Distributable AmountMonthly Interest
    
    $
    2,565,000.00
    
    
    
    3.375000Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    2,565,000.00Class A-5 Notes Distributable AmountMonthly Interest
    
    $
    941,577.32
    
    
    
    1.238918Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    941,577.32Class B Notes Distributable AmountMonthly Interest
    
    $
    534,072.09
    
    
    
    4.349015Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    534,072.09Class C Notes Distributable AmountMonthly Interest
    
    $
    181,517.69
    
    
    
    3.941667Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    181,517.69Class D Notes Distributable AmountMonthly Interest
    
    $
    166,297.08
    
    
    
    5.416667Monthly Principal
    
    
    
    
    
    
    Distributable Amount
    
    $
    166,297.08Total Servicing Fee
    
    $
    4,200,472.76
    
    
    
    1.267536LIBOR Rate
effective for current Distribution Period
    
    
    4.37
    %
 Page 2




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##### 



Monthly Servicing Report
Capital Auto Receivables Asset Trust 2005-1
December 2005Distribution Date: 1/17/06 Part III. Payment Ahead and AdvancesPayment Ahead Servicing AccountBeginning Payment Ahead Balance
    
    $
    5,428,031.99Less: Payments Applied
    
    
    1,452,779.71Current Period Payments Ahead Received
    
    
    1,145,214.93Ending Payment Ahead Balance
    
    $
    5,120,467.21Advance AccountBeginning Outstanding Unreimbursed Scheduled Principal and Interest Advances
    
    $
    3,388,150.44Beginning Outstanding Unreimbursed Simple Interest Advances
    
    
    1,948,882.90Scheduled Principal and Interest Advances
    
    
    1,516,693.87Simple Interest Advances
    
    
    370,756.67Reimbursement of Previous Scheduled Principal and Interest Advances
    
    
    1,118,162.76Reimbursement of Previous Simple Interest Advances
    
    
    Ending Outstanding Unreimbursed Scheduled Principal and Interest Advances
    
    $
    3,786,681.55Ending Outstanding Unreimbursed Simple Interest Advances
    
    $
    2,319,639.57Part IV. Balances & Principal FactorsBeginning of Period
    
    
    End of PeriodTotal Pool Balance
    
    $
    2,520,283,656.76
    
    
    $
    2,419,791,935.85Total Pool Factor
    
    
    0.7605215
    
    
    
    0.7301971Class A-1 Notes Balance
    
    $
    
    
    
    $
    Class A-1 Notes Principal Factor
    
    
    
    
    
    
    Class A-2a Notes Balance
    
    $
    342,315,843.11
    
    
    $
    283,841,819.06Class A-2a Notes Principal Factor
    
    
    0.7607019
    
    
    
    0.6307596Class A-2b Notes Balance
    
    $
    190,175,468.39
    
    
    $
    157,689,899.48Class A-2b Notes Principal Factor
    
    
    0.7607019
    
    
    
    0.6307596Class A-3 Notes Balance
    
    $
    600,000,000.00
    
    
    $
    600,000,000.00Class A-3 Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000Class A-4 Notes Balance
    
    $
    760,000,000.00
    
    
    $
    760,000,000.00Class A-4 Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000Class A-5 Notes Balance
    
    $
    229,825,000.00
    
    
    $
    229,825,000.00Class A-5 Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000Class B Notes Balance
    
    $
    122,803,000.00
    
    
    $
    122,803,000.00Class B Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000Class C Notes Balance
    
    $
    46,051,000.00
    
    
    $
    46,051,000.00Class C Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000Class D Notes Balance
    
    $
    30,701,000.00
    
    
    $
    30,701,000.00Class D Notes Principal Factor
    
    
    1.0000000
    
    
    
    1.0000000
 Pool Statistics
    
    Inception
    
    

Beg of Period
    
    
    End of PeriodNumber of Accounts
    
    
    189,292
    
    
    
    165,693
    
    
    
    162,385Weighted Average Coupon
    
    
    4.24
    %
    
    
    4.02
    %
    
    
    4.01
    %Weighted Average Remaining Term
    
    
    47.87
    
    
    
    41.96
    
    
    
    41.15Weighted Average Age
    
    
    12.75
    
    
    
    18.66
    
    
    
    20.33
 Page 3




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##### 



Monthly Servicing Report
Capital Auto Receivables Asset Trust 2005-1
December 2005Distribution Date: 1/17/06 Part V. Reserve Account Per $1000 ofOriginal PrincipalBeginning Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Draw for Servicing Fee
    
    
    
    
    
    
    
    
    
    
    Draw for Class A-1a Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class A-1b Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class A-2 Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class A-3 Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class A-4 Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class B Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class C Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Draw for Class D Notes Distributable Amount
    
    
    
    
    
    
    
    
    
    
    Additions to Reserve Account (for Accumulation Account)
    
    
    
    
    
    
    
    
    
    
    Additions to Reserve Account
    
    
    
    
    
    
    
    
    
    
    Releases from Reserve Account
    
    
    
    
    
    
    
    
    
    
    Ending Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Early Amortization Trigger:Reserve Account Balance is less than the Specified Reserve
Account Balance for Two Consecutive MonthsPreceding Collection PeriodSpecified Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Current Collection PeriodSpecified Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Reserve Account Balance
    
    
    
    
    
    $
    15,350,406.12Part VI. Carryover ShortfallPer $1000 ofOriginal PrincipalNoteholders Interest Carryover Shortfall
    
    
    
    
    
    $
    
    
    
    
    Noteholders Principal Carryover Shortfall
    
    
    
    
    
    $
    
    
    
    
    Part VII. Charge Off and Delinquency RatesCharge Off Rate
    
    Average Receivables
    
    

Net
Charge-Offs
    
    
    Loss RateDecember 2005
    
    $
    2,470,037,796.31
    
    
    $
    1,658,951.49
    
    
    
    0.8060
    %November 2005
    
    $
    2,570,508,246.07
    
    
    $
    1,291,500.48
    
    
    
    0.6029
    %October 2005
    
    $
    2,674,017,966.22
    
    
    $
    955,441.68
    
    
    
    0.4288
    %Three Month Average Loss Rate
    
    
    
    
    
    
    
    
    
    
    0.6125
    %Delinquency Rate*
    
    Total Accounts
    
    
    Accounts Over 60
    
    
    % DelinquentDecember 2005
    
    
    162,385
    
    
    
    800
    
    
    
    0.4927
    %November 2005
    
    
    165,693
    
    
    
    698
    
    
    
    0.4213
    %October 2005
    
    
    169,160
    
    
    
    789
    
    
    
    0.4664
    %Three Month Average Delinquency Rate
    
    
    
    
    
    
    
    
    
    
    0.4601
    %
 * Includes delinquencies on Hurricane accounts held in special handling. The delinquency detail on the Hurricane accounts only is as follows: Hurricane AccountsDecember
Accounts Over 60
    
    
    
    
    
    
    137Delinquency
Stratification
    
    Total Accounts
    
    
    Total $31-60 days
    
    
    4,802
    
    
    $
    72,520,618.7661-90 days
    
    
    655
    
    
    $
    10,409,829.79>90 days
    
    
    145
    
    
    $
    2,553,013.42


Page 4



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##### 



Monthly Servicing Report
Capital Auto Receivables Asset Trust 2005-1
December 2005
Distribution Date: 1/17/06 Part VIII. Prepayment Rate Month
    
    Prepayment Rate1
    
    
    0.728%2
    
    
    1.980%3
    
    
    1.570%4
    
    
    1.811%5
    
    
    1.410%6
    
    
    1.330%7
    
    
    1.206%8
    
    
    1.275%
 Page 5