Going out on a limb here...but I think this may be a COPO Chevelle.
Compare its trim tag to my previous COPO...now owned/restored by Jeff Latondress. Similar body numbers for the same build timeframe, and the special order code is fairly close.
Link to 1969 Chevelle eBay auction
Auction car trim tag, VIN 136379B396221
My old car, VIN 136379B394091