Based on naming of children of David & his siblings, it is probable that his parents were a William & Elizabeth Sloan.
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B.H. Stribling says that he came to America abt 1773 and settled in Mecklenburg Co. NC. After marriage settled on west bank of Seneca river [Sloan's ferry] in what is now Anderson Co. SC. 1791 received grant for 1,500 acres near fork of Seneca & Tugaloo rivers. Build log cabin in 1794. Originally buried on his plantation but later moved to Andersonville Baptist Church Cemetery prior to the forming of Lake Hartwell. At death owned 9,000 acres 54 slaves & $9,000. [see article for more info]
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Need to check DAR#551767 Eliz. Wilcox Blanton: #552921, #337806, #368648, #200032, #204869.
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Evidence of Revolutionary Service:
STATE TREASURY RECORDS, reel s.115.45p
MORGAN District:

Vol. K - p. 42 Comptrollers Office- Kingston
Sundries pd. by John Brown, Esq. - Treas. Morgan Dist.:
File #14 - To William Slone May 1781 - 250 16.8
To David Sloan May 1781 - 200 13.4
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Jan 2000, Beverly Sloan Shuler says: "David's brother (older?) William, served as a Lt., in same unit, if I remember correctly. Both got land in Franklin Co., GA, for their services - or rather, perhaps, just because they had served in the Revolution, and not directly "for their service." William got 400 acres (an Officers's grant), and David 200 acres (an enlisted man's grant) , on the waters of Martin's Creek and Coneross Creek. In 1787, this part of Franklin Co., GA, was put into Pendleton District, SC, when they moved the boundary line between the two states from the Keowee River to the Tugaloo River. This is really important in tracing his family. David was able to get lots of land (1900 acres, I've counted.) and slaves. William was not as enterprising as David, or just invested in Georgia land, rather than SC. Jo White Linn found David's and William's marriage records in Wilkes Co. for me, and as a special treat, a Catherine "Caty" Sloan who was close kin to them - a sister, I believe. She married first, Hugh Montgomery, then, in Wilkes, John Cleveland, brother of Benjamin Cleveland. David and Susannah Majors m. in 1784; William and Polly Perkins m. same year. There were two land grants there for William SLOAN, "on both sides of the Roaring River." It is a little settlement near Wilkesboro, NC."
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In an unrelated pension application:
Richard Gordon volunteered in the service of the United States the 16th of August 1781 in Wilkes County North Carolina in an expedition against the Indians for three months under Capt. John Beverly and Col. Hearn and marched to Pleasant Garden near the head of Kataboo River when we joined Gen. McDowel's army, was principally engaged in the Cherokee nation, what was called the middle settlements, scouring the country destroying Indian houses, towns, crops, etc. There were two companies that went in this expedition making near four hundred men that marched from Wilkes Court House to Pleasant Garden, one commanded by Capt. Sloan and the other by Capt. Berry, {Not really sure who this Capt. Sloan is, maybe he is the one on Mecklenburg Co. NC. f.e.m.}
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Some researchers believe this is the same family:
South-Carolina Gazette, No. 1657, June 22 to June 29, 1767.
the article reads in part."to the Humane and Charitable, Charles-Town, June 24th, 1767....the ship(The Nancy) from Ireland.....young children laying intirely naked,whose parents had expired but a few days ago." listed in the COUNCIL JOURNAL, page 190 are James Sloan, 15/William Sloan,14/David Sloan,12. per the SC Gazette, the Ship Nancy, Samuel Hannah, captain, departed Belfast on 6/15/1767.
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Originally buried in his own yard. Tombstones (graves?) relocated to New Andersonville Baptist Church on Dobbins Bridge Road, not far from Sloan's Ferry Road and Lake Hartwell.
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For transcript of his will go to:
http://boards.ancestry.com/mbexec?htx=message&r=rw&p=surnames.sloan&m=875
Other info found at:
http://ftp.rootsweb.com/pub/usgenweb/sc/anderson/cemeteries/a360.txt
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Same or not?
Wilks Co. NC. Gen. Soc. Vol. 7,8, or 9:
"David Sloan is listed as a laborer in 14 Jan 1783 criminal action papers and named in a bastardly bond 27 Apr 1784 with Sarah Nichols, no mention of child's name. Also listed as selling a horse for 31-0-0 when? Brother/Son of William Sloan?"
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5Dec 1791: Land grant 530 acres, Vol. 29, Pg. 251 to David Sloan in Pendleton Dist.
June 1799: Land grant 346 acres, Vol. 44, Pg. 461 to David Sloan in Pendleton Dist.
7Jul 1806: Land grant 92 acres, Vol. 52, Pg. 257 to David Sloan in Pendleton Dist.

Sources:
1. Census 1790: Pendleton Dist. SC. Pg. 83 [2 2 4 3slaves]
2. Census 1800: Pendleton Dist. SC. [21110 32010]
3. Census 1810: Pendleton Dist. SC. [22101 11001] 31 slaves
4. Census 1820: Pendleton Dist. SC. [020101 00101]
5. Census 1830: Anderson Co. SC. pg172 Susannah [000010000 0000000010]
6. Census 1840: Anderson Co. SC. pg104 Susan [000010000 0000000001]
7. Roster of Tex DAR Vol. III pg1948 by Tex DAR.
8. "Striblings of Walnut Hill and Related Familes" by Bruce H. Stribling, 1979 [dpob, dpod]
9. LDS: International Genealogial Index
10. Anderson Co. cemetery records [dod, age 73]
11. SC State Land Grant Index 1784 to 1821
11. Carpenter-Weir Family of Upper S.C. by Henry Bacon McKoy, 1959
12. Research of Beverly Sloan Shuler
13. William Weimar Sloan [photo DSloan0.jpg]
14. Nancy Crayton [house photos DSHouse1.jpg & DSHouse2.jpg & tombstone photo TS000049.jpg]

• Married: 19 JAN 1784 in WILKES Co. NC.

1. William Sloan b: 1786
2. David Sloan b: 19 MAY 1787 in Old Pendleton Dist. SC.
3. Susannah Sloan b: 19 MAY 1787 in Old Pendleton Dist. SC.
4. Elizabeth Sloan b: 16 APR 1788 in Old PENDLETON Dist. SC.
5. Nancy Sloan b: 2 JUL 1789 in Old Pendleton Dist. SC.
6. Mary Sloan b: 5 MAR 1791 in PENDLETON D Co. SC.
7. Rebecca Sloan b: 1794 in Old Pendleton Dist. SC.
8. Benjamin Franklin Sloan b: 2 DEC 1796 in Old Pendleton Dist. SC.
9. Thomas Majors Sloan b: 12 MAY 1799 in Old Pendleton District, SC.
10. Catherine Sloan b: 6 DEC 1802 in Old Pendleton Dist. SC.
11. William Sloan b: ABT 1805 in Old Pendleton Dist. SC.
12. James Madison Sloan b: ABT 1806 in Old Pendleton Dist. SC.

1. Title: "Carpenter - Weir Family of Upper South Carolina"
   Author: McKoy, Henry Bacon (1893-1991)
   Publication: Keys Printing Company, 1004 Congaree Rd Ext, Greenville, SC 29615-0000
   Repository:
   Media: Book
2. Title: Sloan, Philip Steven
   Publication: 170 Sunnifield Drive, Williston, SC. 29853: May 00 - 8 Apr 2007
   Repository:
   Note: Sloan-PS.doc: V Line
   Media: Letter
   Page: Tombstone photo: TS000072.jpg GPS = N34 29.052 x W82 48.270
   Text: [David Sloan, d. 9 Oct 1826 in his 75th year of age, burial]
3. Title: "Sloan Plantation Cemetery"
   Author: Alexandra Landrum
   Publication: Rootsweb Website: Feb 2005
   Repository:
   Note: http://ftp.rootsweb.com/pub/usgenweb/sc/anderson/cemeteries/a360.txt
   Media: Other
   Text: [David McCurdy Sloan]