Which windshield washer pump is front/rear?

2001 Suburban 1500 with rear wiper. I pulled out my leaking reservoir and noticed that one of the pumps is in bad shape, though it might have been working. Now I am trying to determine if it is the front or the rear pump. The good pump has a blue connector on it and the fluid tubing elbow is black. The bad pump has a red connector and a white elbow. Which is front and which is rear? I believe the one with the blue connector sits in the lower perch on the washer reservoir on the driver's side but am not positive.