Does this part fit both sides of the upper rack?
Answer Hello Jennifer! The inner rail upr rack WD30X10039 can be used as the left or right side. Thanks!
Will this part WD30X10039 (Iinner rail) work on my GDWF100V40WW GE Dishwasher?
Answer Hello Rick! Yes, the upper rack inner rail WD30X10039 is the correct part listed for your model GDWF100V40WW. Thanks!