Tl* the contact owns a 2010 chevrolet suburban 1500. the contact owns a 2011 graco turbo booster seat, model number 1747302, manufactured on june 10, 2011. the contact stated the owner's manual does not provide adequate instructions for the attachment of the booster seat strap. the size of the hole that the strap travels through was extremely narrow; and both booster seat arms were poorly designed. the manufacturer was made aware of the failure. the vin and failure mileage were unavailable. updated 9/20/11 *cn\ the consumer stated significant assembly was required, the written assembly instructions were poor, and even with pictures provided they were not adequate to ensure safe installation. if the screws were not installed in the arms, they could easily detach from the seat and release the seat belt. the arms of the booster seat were not secure enough or strong enough to retain the shoulder strap in an accident. the arms of the booster seat does not prevent a child from removing the vehicle shoulder strap from its required position below the arm rest. the five slots on the back of the booster seat presented too many possible attachments points for the strap that was provided with the seat. the three slots on the back of the booster seat were too weak to secure the strap, but was the only location where the strap could easily be installed. the two corner slots located on the outer edges of the seat was strong enough to secure the straps, but they were too narrow to make installation of the strap easy. the seat belt attachment clip on the booster seat strap was slotted and could allow the vehicle seat belt to become detached in a violent accident or be removed by a determined child. updated 01/19/12