The issue with your Grand Design RV roller shade not rolling back up is most commonly caused by a broken or weakened spring inside the roller tube. To fix this, you will likely need to replace the roller spring. It's important to measure the outside diameter of the aluminum roller tube—typically either 3/4 inch for Value Line shades or 1.25 inches for Premium shades—as this determines the correct spring size. If the roller tube or hardware is damaged, you may need a full replacement assembly, but usually, a spring replacement suffices. You can remove the shade to measure the tube diameter or check your model specifications. Elkhart RV Parts offers replacement springs for these common sizes, which can restore smooth rolling operation and extend the life of your shade.