This is the only thing I could find. It's about 3/4 down the page. This guy could be related, but was only born in 2009, so is the same age as your horse!
Helluva Chex is in Allbreed Pedigree
. San Antonio
HELLUVA TROUBLEMAKER - 2009 AQHA CREMELLO STALLION (Helluva Chex x dgtr of Doc O Boots) AQHA Incentive Fund, NRBC, APHA Breeder's Trust, NRHA Derby Eligible, Kentucky Incentive Fund, Palomino Breed Registry, Atlantic Breeders Incentive.