some help

I just went on a trip on my '03 trailblazer ,v6(now 132000 miles), I drove less than a 1,000 miles on this trip, and during the trip I noticed that the cruise control just stop working, I have checked all fuses but I have'nt found anything that could cause the malfunction, any help? what shoul I look for? and how to fix it?
:banghead:

Use a scan tool and check for any codes first.