Indicated by the name, non prescription eyewear, without a lens prescription, also called clear lens glasses, is less important in function, but is quite critical and helpful in enhancing the wearer's facial look.
The 2011 Buick Enclave is rated for a maximum tow of 4,500 pounds. Back the Enclave up to the trailer's tongue. Ask someone to stand by and direct you. When the Enclave is in position, lower the trailer coupler onto the Enclave's hitch and lower the latch.
The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See your Chevrolet dealer for additional details. Trailer tongue weight should be 10% to 15% of total loaded trailer weight (up to 600 lbs.).