UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-D

ASSET-BACKED ISSUER

DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the monthly distribution period from

March 1, 2017 to March 31, 2017

Commission File Number of issuing entity: 333-181915-06

Central Index Key Number of issuing entity: 0001637287

Ally Auto Receivables Trust 2015-SN1

(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-181915-01

Central Index Key Number of depositor: 0001477336

Ally Auto Assets LLC

(Exact name of depositor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001601846

Ally Bank

(Exact name of sponsor as specified in its charter)

Elliot Kahan

(866) 710-4623

(Name and telephone number, including area code, of the person to contact in connection with this filing)



DELAWARE		36-7659714
(State or other jurisdiction of incorporation or organization of the		(I.R.S. Employer Identification No.)
issuing entity)



Ally Auto Assets LLC		48226
500 Woodward Avenue, Detroit, Michigan		(Zip Code)
(Address of principal executive offices of the issuing entity)

(866) 710-4623

(Telephone number, including area code)

Registered / reporting pursuant to (Check One)



Title of Class	Section 12(b)	Section 12(g)	Section 15(d)	Name of Exchange
				(If Section 12(b))
Class A-2a			X
Class A-2b			X
Class A-3			X
Class A-4			X

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

PART I — DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information

Distribution and pool performance information of the asset pool of the issuing entity is set forth in the attached monthly Statement to Securityholder.

Item 1121(c) of Regulation AB. Repurchases and Replacements

No activity to report for the Period from March 1, 2017 to March 31, 2017 as required by Item 1121(c) of Regulation AB.

Date of most recent Form ABS-15G: February 8, 2017

Central Index Key (CIK) of Securitizer: 0001477336

Item 1A. Asset-Level Information

Not Applicable.

Item 1B. Asset Representations Reviewer and Investor Communication

Not Applicable.

PART II — OTHER INFORMATION

Item 2. Legal Proceedings

None.

Item 3. Sales of Securities and Use of Proceeds

None.

Item 4. Defaults Upon Senior Securities

None.

Item 5. Submission of Matters to a Vote of Security Holders

None.

Item 6. Significant Obligors of Pool Assets

None.

Item 7. Change in Sponsor Interest in the Securities

None.

Item 8. Significant Enhancement Provider Information

None.

Item 9. Other Information

None.

Item 10. Exhibits



EXHIBIT NO.		DESCRIPTION

99		Monthly Statement to Securityholder for the Period from March 1, 2017 to March 31, 2017

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.



	Ally Auto Receivables Trust 2015-SN1
	(Issuing Entity)

	by: Ally Financial Inc.
	(Servicer, not in its individual capacity but
	solely as Servicer on behalf of the Issuing Entity)



	/s/ David J DeBrunner
	David J DeBrunner,
	Vice President, Controller
	and Chief Accounting Officer

Date: April 26, 2017

EXHIBIT INDEX



EXHIBIT NUMBER		DESCRIPTION

99		Monthly Statement to Securityholder for the Period from March 1, 2017 to March 31, 2017

Ally Auto Receivables Trust 2015-SN1 10-D