squeaky tailgate

For a while now, whenever I hit any bumps in the road, the tailgate and the glass squeaks. It wont squeak when the glass is open, and I've tried greasing the suspension attached to the glass, but havent been able to stop it. Any suggestions?

loosen all screws on hinges they are very tight be sure you use a #3 phillips head screwdriver remove one of the screws at a time find two o-rins for each hole find some that fit tight in there aroun the part the scre goes into stack two to three in there and reinstall the screws this should help