Okay, was thinking liftgate, not tailgate. The rod retainers break at the handle and the rods no longer release the latches. Follow instructions below to repair. The plastic retainers can be purchased at any parts store. Be careful when removing the bezel not to break the tabs that hold it in.
Integral Adhesive Foam Blocks
Integral Locking Tabs - Upper
TipGently pry downward with a small flat-bladed tool at the two locations in order to release the upper retaining tabs.
Integral Retention Tabs - Lower
Pick Up Box Endgate Latch Handle Bezel Replacement
TipOnce in position, gently wet out the adhesive foam blocks to the endgate panel.
In the illustration below, the rod #1 attaches to the handle at the center. There is another identical rod on the right side as well (not shown in the illustration). Make sure the rods are connected to the handle. The plastic retainers that attach the rods to the handle sometimes break.
Remove the bezel (black plastic piece around the handle). This will give you plenty of room to access the rods.
The bezel is held in place with two clips #2 in picture below. You can release the clips with a thin screwdriver blade placed between the bezel and the tailgate. Tape the blade of the screwdriver to avoid scratching the paint on your tailgate.
The clips could break off if you are not careful. The clips are at location #2 in the illustration below.