my hummer h3 wont start...

i hate this ive had this problem had it sent to fix and came back the same
way...wondering whats wrong with it ...ready to buy big tires but if this continues ..im
thinking maybe it time for a trade in...im tired of tell people it thinks its getting stolen
and it shuts off...and wait till 10 mins...sucks what if emeragey then want....ive had to
walk or take other car this sucks im ganna write a letter to the hummer dealerships to
let them know i've had it .....