Pulled Pork Barbecue

15% calorie reduction from traditional recipe

1 whole pork tenderloin, (about 1 pound), all fat trimmed
1 teaspoon chili powder
1/2 teaspoon garlic powder
Vegetable cooking spray
1/2 cup finely chopped onion
1 1/2 teaspoons minced garlic
1 can (15 ounces) crushed tomatoes, undrained
1 tablespoon cider vinegar
1 tablespoon prepared mustard
1 to 2 teaspoons chili powder
1/4 teaspoon maple extract
1/4 teaspoon liquid smoke
1/3 cup Equal