Ah, sorry, I thought you meant can you travel to the us with your current Canadian visa. If it's not multiple entry, I wouldn't risk it, as if you aren't allowed back in, your PR app is cancelled.
From the IRCC site:
You can request to return to Canada on your original single-entry temporary resident visa, if:
you will only visit the U.S. or St. Pierre and Miquelon; and
you will return to Canada before the end of your approved stay in Canada.