Exhibit 99.1

GM Financial Automobile Leasing Trust 2018-3

3.81% Exchange Note

Class A-1 2.41515% Asset Backed Notes

Class A-2A 2.89% Asset Backed Notes

Class A-2B Floating Asset Backed Notes

Class A-3 3.18% Asset Backed Notes

Class A-4 3.30% Asset Backed Notes

Class B 3.48% Asset Backed Notes

Class C 3.70% Asset Backed Notes

Class D 3.80% Asset Backed Notes

Servicer’s Certificate

Beginning of Period:	12/01/20
End of Period:	12/31/20
Number of days in Interest Period (Actual/360):	30
Number of days in Collection Period:	31
Report Due Date:	01/15/21
Distribution Date:	01/20/21
Transaction Month:	28

					Original Agg.
2018-3 Designated Pool	Units		Start Date	Closing Date	Securitization Value
		56,655	08/01/2018	09/26/2018	$	1,362,465,324

Total		56,655			$	1,362,465,324

RECONCILIATION OF 2018-3 DESIGNATED POOL AGGREGATE SECURITIZATION VALUE

{1}

Beginning of period Aggregate Securitization Value

{1}

280,557,710

{2}

Reduction in Agg. Securitization Value due to payments

{2}

3,326,093

{3}

Reduction in Agg. Securitization Value due to Defaulted Leases

{3}

219,623

{4}

Reduction in Agg. Securitization Value due to early terminations, dealer buyouts, cancellations, repurchases

{4}

40,067,199

{5}

Other adjustments

{5}

{6}

Total change in Agg. Securitization Value

{6}

43,612,915

{7}

End of period Aggregate Securitization Value

{7}

236,944,795

{8}

Seller’s Exercise of 10% Option

{8}

236,944,795

{9}

Pool Factor

{9}

17.390886

RECONCILIATION OF 2018-3 EXCHANGE NOTE

{10}	Original Exchange Note Balance	{10}	$	1,295,000,000

{11}	Beginning of period Exchange Note Balance	{11}	$	213,092,386

{12}	Exchange Note Principal Payment Amount	{12}		51,314,251

{13}	With Optional Purchase, the Exchange Note shall be discharged and released	{13}		161,778,135

{14}	End of period Exchange Note Balance	{14}	$	0

{15}	Note Pool Factor	{15}		0.000000	%

RECONCILIATION OF THE ASSET BACKED NOTES

			Class A-1			Class A-2A			Class A-2B			Class A-3			Class A-4
{16}	Original Note Balance	{16}	$	192,000,000		$	340,000,000		$	70,000,000		$	410,000,000		$	86,140,000

{17}	Beginning of period Note Balance	{17}	$	0		$	0		$	0		$	0		$	0

{18}	Noteholders’ Principal Distributable Amount	{18}		0			0			0			0			0
{19}	Noteholders’ Accelerated Principal Amount	{19}		0			0			0			0			0
{20}	Aggregate Principal Parity Amount	{20}		0			0			0			0			0
{21}	Matured Principal Shortfall	{21}		0			0			0			0			0

{22}	End of period Note Balance	{22}	$	0		$	0		$	0		$	0		$	0

{23}	Note Pool Factor	{23}		0.000000	%		0.000000	%		0.000000	%		0.000000	%		0.000000	%

			Class B			Class C			Class D			TOTAL
{24}	Original Note Balance	{24}	$	59,270,000		$	55,180,000		$	34,060,000		$	1,246,650,000

{25}	Beginning of period Note Balance	{25}	$	55,071,178		$	55,180,000		$	34,060,000		$	144,311,178

{26}	Noteholders’ Principal Distributable Amount	{26}		55,071,178			55,180,000			34,060,000			144,311,178
{27}	Noteholders’ Accelerated Principal Amount	{27}		0			0			0			0
{28}	Aggregate Principal Parity Amount	{28}		0			0			0			0
{29}	Matured Principal Shortfall	{29}		0			0			0			0

{30}	End of period Note Balance	{30}	$	0		$	0		$	0		$	0

{31}	Note Pool Factor	{31}		0.000000	%		0.000000	%		0.000000	%		0.000000	%

EXCHANGE NOTE MONTHLY PRINCIPAL PAYMENT AND INTEREST CALCULATIONS

Principal payment calculation:

{32}

Beginning of period Designated Pool Balance

{32}

N/A

{33}

Ending Designated Pool Balance

{33}

236,944,795

{34}

Unpaid prior Exchange Note Principal Payment Amount

{34}

{35}

Sum of {33} + {34}

{35}

236,944,795

{36}

Exchange Note Principal Payment Amount {32} - {35}

{36}

N/A

	Interest calculation:
		Beg Note Balance		Interest Carryover		Interest Rate			Days	Days Basis	Interest
{37}		$	213,092,386	$	0		3.81	%	30	30/360	$	676,569

RECONCILIATION OF EXCHANGE NOTE COLLECTION ACCOUNT

Additions:

{38}

2018-3 Designated Pool Collections (net of Liquidation Proceeds and fees)

{38}

4,478,805

{39}

Net Liquidation Proceeds collected during period

{39}

47,745,813

{40}

Investment Earnings

{40}

700

{41}

Investment Earnings - transferred to Indenture Note Collection Account

{41}

(700

)

{42}

Deposit from Servicer

{42}

{43}

Total Additions:

{43}

52,224,618

Distributions:

{44}

To the Servicer, Designated Pool Servicing Fee

{44}

233,798

{45}

To the 2018-3 Exchange Noteholder, the Exchange Note Interest Payment Amount

{45}

676,569

{46}

To the 2018-3 Exchange Noteholder, the Exchange Note Principal Payment Amount

{46}

51,314,251

{47}

To the 2018-3 Exchange Noteholder, any funds available to pay obligations pursuant to Indenture Section 8.3 (a)(i) through (xvii)

{47}

{48}

To the 2018-3 Exchange Noteholder, all remaining funds to be applied as Excess Exchange Note Payments

{48}

{49}

Total Distributions:

{49}

52,224,618

NOTEHOLDERS’ MONTHLY PRINCIPAL PAYMENT AND INTEREST CALCULATIONS

Noteholders’ Principal Distributable calculation:

{50}

Beginning Agg. Securitization Value

{50}

N/A

{51}

Ending Agg. Securitization Value

{51}

236,944,795

{52}

Principal Distributable Amount {50} - {51}

{52}

N/A

{53}

Noteholders’ Principal Carryover Amount

{53}

{54}

Principal Distributable Amount + Noteholders’ Principal Carryover Amount

{54}

N/A

{55}

Amount required to reduce Outstanding Amount after giving effect to distributions made pursuant to Indenture Section 8.3 (i) through (xiii) to the Required Pro Forma Note Balance

{55}

{56}

Noteholders’ Principal Distributable Amount Lessor of {54} and {55}

{56}

N/A

	Noteholders’ Interest Distributable calculation:
	Class	Beg Note Balance		Interest Carryover		Interest Rate			Days	Days Basis	Interest
{57}	Class A-1	$	0	$	0		2.42	%	30	Actual/360	$	0
{58}	Class A-2A	$	0		0		2.89	%	30	30/360		0
{59}	Class A-2B	$	0		0		0.32163	%	30	Actual/360		0
{60}	Class A-3	$	0		0		3.18	%	30	30/360		0
{61}	Class A-4	$	0		0		3.30	%	30	30/360		0
{62}	Class B	$	55,071,178		0		3.48	%	30	30/360		159,707
{63}	Class C	$	55,180,000		0		3.70	%	30	30/360		170,139
{64}	Class D	$	34,060,000		0		3.80	%	30	30/360		107,857

RECONCILIATION OF INDENTURE COLLECTION ACCOUNT

Available Funds:

{65}

2018-3 Exchange Note Collections

{65}

51,990,820

{66}

Investment Earnings

{66}

{67}

Investment Earnings - transferred from Exchange Note Collection Account

{67}

700

{68}

Investment Earnings - and amounts released from Reserve Account pursuant to Section 2.14(b)(ii) of Servicing Supplement

{68}

{69}

Optional Purchase Price

{69}

144,748,881

{70}

Indenture Section 5.4 disposition of Collateral

{70}

{71}

Available Funds:

{71}

196,740,499

{72}

Reserve Account Withdrawal Amount

{72}

6,812,327

{73}

Total Distributable Funds:

{73}

203,552,826

Distributions:

{74}

To the Successor Servicer, unpaid transition expenses, pro rata

{74}

{75}

To the Indenture Trustee, any accrued and unpaid fees & expenses, pro rata

{75}

417

{76}

To the Issuer Owner Trustee, any accrued and unpaid fees & expenses, pro rata

{76}

208

{77}

To the Asset Representations Reviewer, any accrued and unpaid fees & expenses, pro rata

{77}

{78}

Class A-1 Noteholders’ Interest Distributable Amount pari passu

{78}

{79}

Class A-2A Noteholders’ Interest Distributable Amount pari passu

{79}

{80}

Class A-2B Noteholders’ Interest Distributable Amount pari passu

{80}

{81}

Class A-3 Noteholders’ Interest Distributable Amount pari passu

{81}

{82}

Class A-4 Noteholders’ Interest Distributable Amount pari passu

{82}

{83}

Class A Noteholders’ Principal Parity Amount or Matured Principal Shortfall

{83}

{84}

Class B Noteholders’ Interest Distributable Amount

{84}

159,707

{85}

Class B Noteholders’ Principal Parity Amount or Matured Principal Shortfall

{85}

{86}

Class C Noteholders’ Interest Distributable Amount

{86}

170,139

{87}

Class C Noteholders’ Principal Parity Amount or Matured Principal Shortfall

{87}

{88}

Class D Noteholders’ Interest Distributable Amount

{88}

107,857

{89}

Class D Noteholders’ Principal Parity Amount or Matured Principal Shortfall

{89}

{90}

Noteholders’ Principal Distributable Amount

{90}

144,311,178

{91}

To the Reserve Account, the Reserve Amount Required Amount

{91}

{92}

To the Noteholders, the Accelerated Principal Amount (as calculated below)

{92}

{93}

To the Successor Servicer, any amounts in excess of the caps set forth, pro rata

{93}

{94}

To the Indenture Trustee, any amounts in excess of the caps set forth, pro rata

{94}

{95}

To the Asset Representations Reviewer, any amounts in excess of the caps set forth, pro rata

{95}

{96}

To the Issuer Owner Trustee, any amounts in excess of the caps set forth, pro rata

{96}

{97}

To the Issuer Trust Certificateholders, the aggregate amount remaining

{97}

58,803,320

{98}

Total Distributions:

{98}

203,552,826

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)
{99}	Class A	$	0	$	236,944,795	$	0	$	203,552,201	$	0
{100}	Class B		55,071,178		236,944,795		0		203,392,494		0
{101}	Class C		110,251,178		236,944,795		0		203,222,355		0
{102}	Class D		144,311,178		236,944,795		0		203,114,498		0

ACCELERATED PRINCIPAL AMOUNT CALCULATION

{103}

Excess Total Available Funds

{103}

58,803,320

{104}

Beginning Note Balance

{104}

144,311,178

{105}

Principal payments through Indenture Section 8.3 (a) (i) through (xv)

{105}

144,311,178

{106}

Pro-Forma Note Balance

{106}

{107}

Ending Aggregate Securitization Value

{107}

236,944,795

{108}

11% of Aggregate Securitization Value as of Cutoff until Class A-2 is paid in full,10% Thereafter ($136,246,532)

{108}

N/A

{109}

Required Pro Forma Note Balance {107} - {108}

{109}

N/A

{110}

Excess of Pro Forma Balance minus Required Pro Forma Balance {106} - {109}

{110}

N/A

{111}

Lesser of Excess Total Available Funds and Excess of Pro Forma Note Balance

{111}

N/A

OVERCOLLATERALIZATION CALCULATIONS

Exchange Note:

{112}

Ending Aggregate Securitization Value

{112}

236,944,795

{113}

End of Period Note Balance

{113}

{114}

Overcollateralization

{114}

{115}

Overcollateralization %

{115}

0.00

Asset Backed Notes:

{116}

Ending Aggregate Securitization Value

{116}

236,944,795

{117}

End of Period Note Balance

{117}

{118}

Overcollateralization

{118}

236,944,795

{119}

Overcollateralization %

{119}

0.00

RECONCILIATION OF 2018-3 CASH RESERVE ACCOUNT

{120}

Specified Reserve Balance

{120}

6,812,327

{121}

Beginning of Period Reserve Account balance

{121}

6,812,327

{122}

Investment Earnings

{122}

{123}

From the Indenture Collection Account, the Reserve Account Required Amount

{123}

{124}

To the Indenture Collection Account, the Reserve Account Withdrawal Amount

{124}

(6,812,425

)

{125}

Total Reserve balance available:

{125}

{126}

Specified Reserve Balance

{126}

6,812,327

{127}

Release Excess Cash to Indenture Collection Available Funds

{127}

{128}

End of period Reserve Account balance

{128}

ASSET REPRESENTATIONS REVIEW DELINQUENCY TRIGGER

Dollars

Percentage

{129}

Receivables with Scheduled Payment delinquent 61 days or more

{129}

560,285

0.24

{130}

Compliance (Trigger Violation is a Delinquency Rate Greater Than 2.90% )

{130}

Yes

By:	/s/ Randal L. Willis
Name:	Randal L. Willis
Title:	Senior Vice President, Securitization & Conduit Reporting
Date:	January 14, 2021

GM Financial

GMALT 2018-3

Supplemental Monthly Data

December 31, 2020

	Aggregate Securitization Value			Residual Value
Beginning of Period	$	280,557,710		$	266,243,228
Change		(43,612,915	)		(266,243,228	)
End of Period	$	236,944,795		$	0

Residual Value as % of Agg. Securitization Value					0.00	%

Delinquency

Leases with scheduled payment delinquent	Number of Leases		Agg. Securitization Value		Percentage⁽¹⁾
0 - 30 days		12,314		234,536,890		98.98	%
31 - 60 days		85		1,847,620		0.78	%
61 - 90 days		22		403,466		0.17	%
91 - 120 days		7		156,819		0.07	%
Total		12,428		236,944,795		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		379		8,380,141		6,219		144,073,303
Standard terminations		409		8,993,163		4,011		79,982,299
Total retained by lessee		788		17,373,304		10,230		224,055,602
Returned Vehicles
Early terminations		629		10,639,278		17,096		298,892,518
Standard terminations		662		12,054,617		15,375		273,394,090
Total returned to dealer		1,291		22,693,895		32,471		572,286,608
Charged off leases / Repossessed vehicles		12		219,623		1,525		31,443,271
Repurchases		0		0		1		61,724
Other		0		0		0		0
Total terminations		2,091		40,286,822		44,227		827,847,205

Lease Extensions/Deferments

	Current Period
	Number of Leases		Agg. Securitization Value		Percentage

Term Extensions		313		5,348,270		1.91	%

Deferments		4		65,660		0.02	%

Net Credit (Gain) Loss

	Current Period			Cumulative
Agg. Securitized Value of early term defaults		219,623			31,443,271
less: Sales proceeds		362,315			32,783,121
less: Excess wear and excess mileage received		1,816			18,384
less: Other amounts received		-			0
Net Credit (Gain) Loss		(144,508	)		(1,358,234	)

Residual (Gain) Loss on Returned Vehicles

Agg. Securitized Value of returned vehicles sold by Servicer	22,553,036		567,773,570
add: Reimbursement of outstanding residual advance	N/A		N/A
less: Sales proceeds	26,616,449		642,137,008
less: Excess wear and excess mileage received	302,508		4,005,969
less: Other recovery amounts	-		0
Residual (Gain) Loss	(4,365,921	)	(78,369,407	)

	Current Period			Prev. Month
Prepay Speed		-5.9072	%		-1.9807	%

Return Rate based on Scheduled to Terminate⁽²⁾		42.9760	%		51.5681	%

Return Rate based on Terminated Leases⁽³⁾		61.7408	%		62.2126	%

(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.

GM Financial Automobile Leasing Trust 2018-3 10-D