Here's what I got on the sn:
Organization: 450TH ORDNANCE COMPANY
Location: AIKEN, SOUTH CAROLINA
Nomenclature:TRUCK CARGO D/S 5-TON Model:M813A1 W/W NSN:2320000508905
Serial Number:C32910216 Registration Number:NL08C2 Year of Mfg:1980
Manufacturer:65909 Contract Number

AAE07-79-D-5015 Usage Miles: 3784
From there it was shipped to the 844th Engineer Company, Knoxville, TN but that unit failed to receive it in the maintenance system and no further record is available.