the tracker on my truck freezes after coming out the tunnal anyone have the same problem
How do you know it freezes?
the tracker isn’t something that the driver sees. 
if you are refering to your satnav/gps, then this is normal when it’s searching for a satelite or two.
What make is it? Never had a problem with any of ours.
the reason i know is my transport manager keeps phoning to see were i am think its navman one apparently the simm card keeps freezing he cant blame me its hidden out of sight thought i was pulling the fuse i think