From the BTN:

This Saturday, the Big Ten Network is airing four games at noon ET, including the Wolverines’ matchup against the University of Massachusetts. The network will make all of these games available to all of our cable and satellite providers to make sure Wolverine fans can access their game. Cable systems assign different channel numbers in every market. If you want to make sure you have the UM-UMass game on your cable system, go to www.BigTenNetwork.com/Gamefinder and enter your zip code to find the channel your game is on. If your game isn’t there, contact your provider.

If you receive the Big Ten Network via satellite or telco, your channel numbers are below.

SATURDAY, SEPTEMBER 18 NOON ET

DIRECTV
UMass @ Michigan – 610 SD / 610-1 HD

DISH Network
UMass @ Michigan – 439 SD / 9500 HD

AT&T U-Verse
UMass @ Michigan - 650 SD / 1650 HD

VERIZON
UMass @ Michigan – 85 SD / 585 HD

BTW, the gamefinder works pretty well. If you don't see your cable provider above, click on the link to find out who's airing the game in your area.