What is the fram oil filter number for a 2003 Chevy Suburban?

There isn't one single Fram oil filter number for a 2003 Chevy Suburban. The correct filter depends on the engine size. You'll need to check your owner's manual or the oil fill cap for the correct specifications. Once you know the specifications (like the ACDelco or GM part number), you can then use a cross-reference chart (available online or at an auto parts store) to find the equivalent Fram filter number.