Marinate tenderloin in Sesame Ginger salad dressing for 4 hours.
Combine orange marmalade, ginger, garlic powder, thyme, pepper, and soy sauce in a bowl. Set aside.
Heat grill to 350°F. Remove tenderloin from marinade and discard marinade. Grill tenderloin on medium-high heat (350) with the lid on. Grill for 3 to 4 minutes turning once. After turning, take the lid off the grill and brush the marmalade mixture on the tenderloin. Grill an additional 3 to 4 minutes.
Remove tenderloin from grill and allow to rest and cool 5 minutes before cutting.