Product review (5 stars): Heat the belt up first!
2 tips: Heat the belt up before you try to install it and use a zip tie to tightly secure it to the pulley.  The belt is smaller than the pulley so you will have to use force to stretch it after warming it up.  Here is a great video on Youtube to help with the install:  [...]
We own a GE Washing Machine model number WHDSR316G1WW and the original belt had this number printed on it: 175D5131P003.  I ordered belt WH01X10302 based on the GE Appliance Part website but the belt that arrived had 175D5131P001 printed on it.  It seemed way too tight at first so I called GE.  They said that the 003 is no longer available and the 001 is the correct replacement belt and it is very tight and you need to apply force to stretch the belt.  The install tool would have been nice but I read that others installed without the tool so I was determined that I could do it without the tool also.  I also borrowed a small tire from one of our childrens LEGO trucks that fit on the bottom of the motor shaft perfectly and helped hold the belt in position as I turned the pulley.