Exhibit 99.1
GM Financial Automobile Leasing Trust 2026-3
4.830% Exchange Note
Class A-1 4.00200% Asset Backed Notes
Class A-2A 4.33% Asset Backed Notes
Class A-2B Floating Rate Asset Backed Notes
Class A-3 4.53% Asset Backed Notes
Class A-4 4.62% Asset Backed Notes
Class B 4.71% Asset Backed Notes
Class C 4.82% Asset Backed Notes
Servicer’s Certificate
| Beginning of Period: | 07/01/26 | ||||
| End of Period: | 08/31/26 | ||||
| Number of days in Interest Period (Actual/360): | 39 | ||||
| Number of days in Collection Period: | 62 | ||||
| Report Due Date: | 09/17/26 | ||||
| Distribution Date: | 09/21/26 | ||||
| Transaction Month: | 1 |
| 2026-3 | Original Agg. | |||||||||||
| Designated Pool | Units | Start Date | Closing Date | Securitization Value | ||||||||
| 31,879 | 07/01/2026 | 08/13/2026 | $ | 1,111,652,923 | ||||||||
| Total | 31,879 | $ | 1,111,652,923 | |||||||||
RECONCILIATION OF 2026-3 DESIGNATED POOL AGGREGATE SECURITIZATION VALUE
| {1} | Beginning of period Aggregate Securitization Value | {1} | $ | 1,111,652,923 | ||||||||
| {2} | Reduction in Agg. Securitization Value due to payments | {2} | 18,108,689 | |||||||||
| {3} | Reduction in Agg. Securitization Value due to Defaulted Leases | {3} | 2,735,676 | |||||||||
| {4} | Reduction in Agg. Securitization Value due to early terminations, dealer buyouts, cancellations, repurchases | {4} | 10,738,118 | |||||||||
| {5} | Other adjustments | {5} | 0 | |||||||||
| {6} | Total change in Agg. Securitization Value | {6} | 31,582,483 | |||||||||
| {7} | End of period Aggregate Securitization Value | {7} | $ | 1,080,070,440 | ||||||||
| {8} | Pool Factor | {8} | 97.158962 | % | ||||||||
RECONCILIATION OF 2026-3 EXCHANGE NOTE
| {9} | Original Exchange Note Balance | {9} | $ | 1,060,000,000 | ||||
| {10} | Beginning of period Exchange Note Balance | {10} | $ | 1,060,000,000 | ||||
| {11} | Exchange Note Principal Payment Amount | {11} | 31,582,483 | |||||
| {12} | End of period Exchange Note Balance | {12} | $ | 1,028,417,517 | ||||
| {13} | Note Pool Factor | {13} | 97.020520 | % |
1
RECONCILIATION OF THE ASSET BACKED NOTES
| Class A-1 | Class A-2A | Class A-2B | Class A-3 | Class A-4 | ||||||||||||||||||||
| {14} | Original Note Balance | {14} | $ | 137,220,000 | $ | 295,000,000 | $ | 90,220,000 | $ | 315,180,000 | $ | 67,860,000 | ||||||||||||
| {15} | Beginning of period Note Balance | {15} | $ | 137,220,000 | $ | 295,000,000 | $ | 90,220,000 | $ | 315,180,000 | $ | 67,860,000 | ||||||||||||
| {16} | Noteholders’ Principal Distributable Amount | {16} | 31,582,483 | 0 | 0 | 0 | 0 | |||||||||||||||||
| {17} | Noteholders’ Accelerated Principal Amount | {17} | 11,158,898 | 0 | 0 | 0 | 0 | |||||||||||||||||
| {18} | Aggregate Principal Parity Amount | {18} | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| {19} | Matured Principal Shortfall | {19} | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| {20} | End of period Note Balance | {20} | $ | 94,478,619 | $ | 295,000,000 | $ | 90,220,000 | $ | 315,180,000 | $ | 67,860,000 | ||||||||||||
| {21} | Note Pool Factor | {21} | 68.851930 | % | 100.000000 | % | 100.000000 | % | 100.0000000 | % | 100.000000 | % | ||||||||||||
| Class B | Class C | TOTAL | ||||||||||||||
| {22} | Original Note Balance | {22} | $ | 49,450,000 | $ | 45,600,000 | $ | 1,000,530,000 | ||||||||
| {23} | Beginning of period Note Balance | {23} | $ | 49,450,000 | $ | 45,600,000 | $ | 1,000,530,000 | ||||||||
| {24} | Noteholders’ Principal Distributable Amount | {24} | 0 | 0 | 31,582,483 | |||||||||||
| {25} | Noteholders’ Accelerated Principal Amount | {25} | 0 | 0 | 11,158,898 | |||||||||||
| {26} | Aggregate Principal Parity Amount | {26} | 0 | 0 | 0 | |||||||||||
| {27} | Matured Principal Shortfall | {27} | 0 | 0 | 0 | |||||||||||
| {28} | End of period Note Balance | {28} | $ | 49,450,000 | $ | 45,600,000 | $ | 957,788,619 | ||||||||
| {29} | Note Pool Factor | {29} | 100.000000 | % | 100.000000 | % | 95.728126 | % | ||||||||
EXCHANGE NOTE MONTHLY PRINCIPAL PAYMENT AND INTEREST CALCULATIONS
Principal payment calculation:
| {30} | Beginning of period Designated Pool Balance | {30} | $ | 1,111,652,923 | ||||||||
| {31} | Ending Designated Pool Balance | {31} | 1,080,070,440 | |||||||||
| {32} | Unpaid prior Exchange Note Principal Payment Amount | {32} | 0 | |||||||||
| {33} | Sum of {31} + {32} | {33} | 1,080,070,440 | |||||||||
| {34} | Exchange Note Principal Payment Amount {30} - {33} | {34} | $ | 31,582,483 |
Interest calculation:
| Beg Note Balance | Interest Carryover | Interest Rate | Days | Days Basis | Interest | |||||||||||||||||||
| {35} | $ | 1,060,000,000 | $ | 0 | 4.830 | % | 38 | 30/360 | $ | 5,404,234 | ||||||||||||||
2
RECONCILIATION OF EXCHANGE NOTE COLLECTION ACCOUNT
Additions:
| {36} | 2026-3 Designated Pool Collections (net of Liquidation Proceeds and fees) | {36} | $ | 36,485,310 | ||||||||
| {37} | Net Liquidation Proceeds collected during period | {37} | 14,095,270 | |||||||||
| {38} | Investment Earnings | {38} | 73,521 | |||||||||
| {39} | Investment Earnings - transferred to Indenture Note Collection Account | {39} | (73,521 | ) | ||||||||
| {40} | Deposit from Servicer | {40} | 0 | |||||||||
| {41} | Total Additions: | {41} | 50,580,580 |
Distributions:
| {42} | To the Servicer, Designated Pool Servicing Fee | {42} | 1,914,513 | |||||||||
| {43} | To the 2026-3 Exchange Noteholder, the Exchange Note Interest Payment Amount | {43} | 5,404,234 | |||||||||
| {44} | To the 2026-3 Exchange Noteholder, the Exchange Note Principal Payment Amount | {44} | 31,582,483 | |||||||||
| {45} | To the 2026-3 Exchange Noteholder, any funds available to pay obligations pursuant to Indenture Section 8.3 (a)(i) through (xiv) | {45} | 10,325,270 | |||||||||
| {46} | To the 2026-3 Exchange Noteholder, all remaining funds to be applied as Excess Exchange Note Payments | {46} | 1,354,080 | |||||||||
| {47} | Total Distributions: | {47} | $ | 50,580,580 |
NOTEHOLDERS’ MONTHLY PRINCIPAL PAYMENT AND INTEREST CALCULATIONS
Noteholders’ Principal Distributable calculation:
| {48} | Beginning Agg. Securitization Value | {48} | $ | 1,111,652,923 | ||||||||||||||||
| {49} | Ending Agg. Securitization Value | {49} | 1,080,070,440 | |||||||||||||||||
| {50} | Principal Distributable Amount {48} - {49} | {50} | 31,582,483 | |||||||||||||||||
| {51} | Noteholders’ Principal Carryover Amount | {51} | 0 | |||||||||||||||||
| {52} | Principal Distributable Amount + Noteholders’ Principal Carryover Amount | {52} | 31,582,483 | |||||||||||||||||
| {53} | Amount required to reduce Outstanding Amount after giving effect to distributions made pursuant to Indenture Section 8.3 (a) (i) through (x) to the Required Pro Forma Note Balance | {53} | 42,741,381 | |||||||||||||||||
| {54} | Noteholders’ Principal Distributable Amount Lesser of {52} and {53} | {54} | $ | 31,582,483 |
Noteholders’ Interest Distributable calculation:
| Class | Beg Note Balance | Interest Carryover | Interest Rate | Days | Days Basis | Interest | ||||||||||||||||||
| {55} | Class A-1 | $ | 137,220,000 | $ | 0 | 4.00200 | % | 39 | Actual/360 | $ | 594,918 | |||||||||||||
| {56} | Class A-2A | $ | 295,000,000 | 0 | 4.33 | % | 38 | 30/360 | 1,348,314 | |||||||||||||||
| {57} | Class A-2B | $ | 90,220,000 | 0 | 3.98283 | % | 39 | Actual/360 | 389,276 | |||||||||||||||
| {58} | Class A-3 | $ | 315,180,000 | 0 | 4.53 | % | 38 | 30/360 | 1,507,086 | |||||||||||||||
| {59} | Class A-4 | $ | 67,860,000 | 0 | 4.62 | % | 38 | 30/360 | 330,931 | |||||||||||||||
| {60} | Class B | $ | 49,450,000 | 0 | 4.71 | % | 38 | 30/360 | 245,849 | |||||||||||||||
| {61} | Class C | $ | 45,600,000 | 0 | 4.82 | % | 38 | 30/360 | 232,003 | |||||||||||||||
3
RECONCILIATION OF INDENTURE COLLECTION ACCOUNT
Available Funds:
| {62} | 2026-3 Exchange Note Collections | {62} | $ | 48,666,067 | ||||||||
| {63} | Investment Earnings | {63} | 0 | |||||||||
| {64} | Investment Earnings - transferred from Exchange Note Collection Account | {64} | 73,521 | |||||||||
| {65} | Investment Earnings - and amounts released from Reserve Account pursuant to Section 2.14(b)(ii) of Servicing Supplement | {65} | 4,917 | |||||||||
| {66} | Optional Purchase Price | {66} | 0 | |||||||||
| {67} | Indenture Section 5.4 disposition of Collateral | {67} | 0 | |||||||||
| {68} | Available Funds: | {68} | 48,744,505 | |||||||||
| {69} | Reserve Account Withdrawal Amount | {69} | 0 | |||||||||
| {70} | Total Distributable Funds: | {70} | 48,744,505 |
Distributions:
| {71} | To the Successor Servicer, unpaid transition expenses, pro rata | {71} | 0 | |||||||||
| {72} | To the Indenture Trustee, any accrued and unpaid fees & expenses, pro rata | {72} | 417 | |||||||||
| {73} | To the Issuer Owner Trustee, any accrued and unpaid fees & expenses, pro rata | {73} | 250 | |||||||||
| {74} | To the Asset Representations Reviewer, any accrued and unpaid fees & expenses, pro rata | {74} | 0 | |||||||||
| {75} | Class A-1 Noteholders’ Interest Distributable Amount pari passu | {75} | 594,918 | |||||||||
| {76} | Class A-2A Noteholders’ Interest Distributable Amount pari passu | {76} | 1,348,314 | |||||||||
| {77} | Class A-2B Noteholders’ Interest Distributable Amount pari passu | {77} | 389,276 | |||||||||
| {78} | Class A-3 Noteholders’ Interest Distributable Amount pari passu | {78} | 1,507,086 | |||||||||
| {79} | Class A-4 Noteholders’ Interest Distributable Amount pari passu | {79} | 330,931 | |||||||||
| {80} | Class A Noteholders’ Principal Parity Amount or Matured Principal Shortfall | {80} | 0 | |||||||||
| {81} | Class B Noteholders’ Interest Distributable Amount | {81} | 245,849 | |||||||||
| {82} | Class B Noteholders’ Principal Parity Amount or Matured Principal Shortfall | {82} | 0 | |||||||||
| {83} | Class C Noteholders’ Interest Distributable Amount | {83} | 232,003 | |||||||||
| {84} | Class C Noteholders’ Principal Parity Amount or Matured Principal Shortfall | {84} | 0 | |||||||||
| {85} | Noteholders’ Principal Distributable Amount | {85} | 31,582,483 | |||||||||
| {86} | To the Reserve Account, the Reserve Account Required Amount | {86} | 0 | |||||||||
| {87} | To the Noteholders, the Accelerated Principal Amount (as calculated below) | {87} | 11,158,898 | |||||||||
| {88} | To the Successor Servicer, any amounts in excess of the caps set forth, pro rata | {88} | 0 | |||||||||
| {89} | To the Indenture Trustee, any amounts in excess of the caps set forth, pro rata | {89} | 0 | |||||||||
| {90} | To the Asset Representations Reviewer, any amounts in excess of the caps set forth, pro rata | {90} | 0 | |||||||||
| {91} | To the Issuer Owner Trustee, any amounts in excess of the caps set forth, pro rata | {91} | 0 | |||||||||
| {92} | To the Issuer Trust Certificateholders, the aggregate amount remaining | {92} | 1,354,080 | |||||||||
| {93} | Total Distributions: | {93} | $ | 48,744,505 |
4
PRINCIPAL PARITY AMOUNT CALCULATION
| Class | (X) Cumulative Note Balance | (Y) Aggregate Securitization Value | (I) Excess of (X) - (Y) | (II) Total Available Funds in Indenture Collection Account | Lesser of (I) or (II) | |||||||||||||||||
| {94} | Class A | $ | 905,480,000 | $ | 1,080,070,440 | $ | 0 | $ | 44,573,313 | $ | 0 | |||||||||||
| {95} | Class B | 954,930,000 | 1,080,070,440 | 0 | 44,327,464 | 0 | ||||||||||||||||
| {96} | Class C | 1,000,530,000 | 1,080,070,440 | 0 | 44,095,461 | 0 | ||||||||||||||||
ACCELERATED PRINCIPAL AMOUNT CALCULATION
| {97} | Excess Total Available Funds | {97} | $ | 12,512,978 | ||||||||||||||||
| {98} | Beginning Note Balance | {98} | 1,000,530,000 | |||||||||||||||||
| {99} | Principal payments through Indenture Section 8.3 (a) (i) through (xii) | {99} | 31,582,483 | |||||||||||||||||
| {100} | Pro-Forma Note Balance | {100} | 968,947,517 | |||||||||||||||||
| {101} | Ending Aggregate Securitization Value | {101} | 1,080,070,440 | |||||||||||||||||
| {102} | 11.0% of Aggregate Securitization Value as of Cutoff until Class A-2 is paid in full, 10.5% Thereafter ($122,281,821) | {102} | 122,281,821 | |||||||||||||||||
| {103} | Required Pro Forma Note Balance {101} - {102} | {103} | 957,788,619 | |||||||||||||||||
| {104} | Excess of Pro Forma Balance minus Required Pro Forma Balance {100} - {103} | {104} | 11,158,898 | |||||||||||||||||
| {105} | Lesser of Excess Total Available Funds and Excess of Pro Forma Note Balance | {105} | $ | 11,158,898 |
OVERCOLLATERALIZATION CALCULATIONS
Exchange Note:
| {106} | Ending Aggregate Securitization Value | {106} | $ | 1,080,070,440 | ||||||||
| {107} | End of Period Note Balance | {107} | 1,028,417,517 | |||||||||
| {108} | Overcollateralization | {108} | 51,652,923 | |||||||||
| {109} | Overcollateralization % | {109} | 4.78 | % |
Asset Backed Notes:
| {110} | Ending Aggregate Securitization Value | {110} | 1,080,070,440 | |||||||||
| {111} | End of Period Note Balance | {111} | 957,788,619 | |||||||||
| {112} | Overcollateralization | {112} | 122,281,821 | |||||||||
| {113} | Overcollateralization % | {113} | 11.32 | % |
5
RECONCILIATION OF 2026-3 CASH RESERVE ACCOUNT
| {114} | Specified Reserve Balance | {114} | $ | 2,779,132 | ||||||||
| {115} | Beginning of Period Reserve Account balance | {115} | $ | 2,779,132 | ||||||||
| {116} | Investment Earnings | {116} | 4,917 | |||||||||
| {117} | From the Indenture Collection Account, the Reserve Account Required Amount | {117} | 0 | |||||||||
| {118} | To the Indenture Collection Account, the Reserve Account Withdrawal Amount | {118} | 0 | |||||||||
| {119} | Total Reserve balance available: | {119} | 2,784,049 | |||||||||
| {120} | Specified Reserve Balance | {120} | 2,779,132 | |||||||||
| {121} | Release Excess Cash to Indenture Collection Available Funds | {121} | 4,917 | |||||||||
| {122} | End of period Reserve Account balance | {122} | $ | 2,779,132 |
ASSET REPRESENTATIONS REVIEW DELINQUENCY TRIGGER
| Dollars | Percentage | |||||||||||
| {123} | Receivables with Scheduled Payment delinquent 61 days or more | {123} | $ | 784,203 | 0.07 | % | ||||||
| {124} | Compliance (Trigger Violation is a Delinquency Rate Greater Than 1.40%) | {124} | Yes | |||||||||
CREDIT RISK RETENTION ¹
| Dollars | Percentage | |||||||||||
| {125} | Fair Value of Residual Interest | {125} | $ | 155,636,570 | 13.46 | % | ||||||
| {126} | Total Fair Value of Notes and Residual Interest | {126} | $ | 1,156,166,570 | 100.00 | % | ||||||
| {127} | Compliance (Fair Value must be at least 5% of the aggregate value of the Notes and Residual Interest) | {127} | Yes | |||||||||
| ⁽¹⁾ | Recalculated as of the closing date. Changes in the fair value methodology or inputs and assumptions as described in the prospectus include final interest rates and final tranche sizes as of the closing date and listed above. In determining the interest payments on the floating rate Class A-2-B Notes, 30-Day Average SOFR is assumed to reset consistent with the applicable forward rate curve as of August 13, 2026. |
| By: | /s/ Randal L. Willis | ||
| Name: | Randal L. Willis | ||
| Title: | Senior Vice President, Securitization & Conduit Reporting | ||
| Date: | September 16, 2026 |
6
GM Financial
GMALT 2026-3
Supplemental Monthly Data
August 31, 2026
| Aggregate Securitization Value | Residual Value | |||||||||
| Beginning of Period | $ | 1,111,652,923 | $ | 879,648,343 | ||||||
| Change | (31,582,483 | ) | (10,633,050 | ) | ||||||
| End of Period | $ | 1,080,070,440 | $ | 869,015,293 | ||||||
| Residual Value as % of Agg. Securitization Value | 80.46 | % | ||||||||
Delinquency
| Leases with scheduled payment delinquent | Number of Leases | Agg. Securitization Value | Percentage(1) | |||||||||||
| 0 - 30 days | 31,381 | 1,076,266,214 | 99.65 | % | ||||||||||
| 31 - 60 days | 87 | 3,020,023 | 0.28 | % | ||||||||||
| 61 - 90 days | 23 | 763,050 | 0.07 | % | ||||||||||
| 91 - 120 days | 1 | 21,153 | 0.00 | % | ||||||||||
| Total | 31,492 | 1,080,070,440 | 100.00 | % | ||||||||||
Lease Terminations
| Current Period | Cumulative | |||||||||||||||||
| Number of Leases | Agg. Securitization Value | Number of Leases | Agg. Securitization Value | |||||||||||||||
| Retained vehicles by lessee | ||||||||||||||||||
| Early terminations | 289 | 10,268,877 | 289 | 10,268,877 | ||||||||||||||
| Standard terminations | 0 | 0 | 0 | 0 | ||||||||||||||
| Total retained by lessee | 289 | 10,268,877 | 289 | 10,268,877 | ||||||||||||||
| Returned Vehicles | ||||||||||||||||||
| Early terminations | 16 | 469,241 | 16 | 469,241 | ||||||||||||||
| Standard terminations | 0 | 0 | 0 | 0 | ||||||||||||||
| Total returned to dealer | 16 | 469,241 | 16 | 469,241 | ||||||||||||||
| Charged off leases / Repossessed vehicles | 82 | 2,735,676 | 82 | 2,735,676 | ||||||||||||||
| Repurchases | 0 | 0 | 0 | 0 | ||||||||||||||
| Other | 0 | 0 | 0 | 0 | ||||||||||||||
| Total terminations | 387 | 13,473,794 | 387 | 13,473,794 | ||||||||||||||
Lease Extensions/Deferments
| Current Period | ||||||||||||||
| Number of Leases | Agg. Securitization Value | Percentage | ||||||||||||
| Term Extensions | 0 | 0 | 0.00 | % | ||||||||||
| Deferments | 10 | 408,411 | 0.04 | % | ||||||||||
7
Net Credit (Gain) Loss
| Current Period | Cumulative | |||||||||||
| Agg. Securitized Value of early term defaults | 2,735,676 | 2,735,676 | ||||||||||
| less: Sales proceeds | 1,958,361 | 1,958,361 | ||||||||||
| less: Excess wear and excess mileage received | 0 | 0 | ||||||||||
| less: Other amounts received | 0 | 0 | ||||||||||
| Net Credit (Gain) Loss | 777,315 | 777,315 | ||||||||||
Residual (Gain) Loss on Returned Vehicles
| Agg. Securitized Value of returned vehicles sold by Servicer | 504,186 | 504,186 | ||||||||||
| add: Reimbursement of outstanding residual advance | N/A | N/A | ||||||||||
| less: Sales proceeds | 524,460 | 524,460 | ||||||||||
| less: Excess wear and excess mileage received | 0 | 0 | ||||||||||
| less: Other recovery amounts | 0 | 0 | ||||||||||
| Residual (Gain) Loss | (20,274 | ) | (20,274 | ) | ||||||||
| Current Period | Prev. Month | ||||||||||
| Prepay Speed | 1.2168 | % | |||||||||
| Return Rate based on Scheduled to Terminate(2) | 0.0000 | % | |||||||||
| Return Rate based on Terminated Leases(3) | 4.1344 | % | |||||||||
| (1) Percentages may not add to 100% due to rounding. |
| (2) Percentage of total number of vehicles returned to dealer over number of vehicles scheduled to terminate per month. |
| (3) Percentage of total number of vehicles returned to dealer over number of vehicles terminated per month. |
8