The Ford F-250 has replaced the Cadillac Escalade as the favorite target of thieves, the Highway Loss Data Institute (HLDI) reports. New antitheft technology on the Escalade, as well as its waning popularity, are two likely reasons the luxury SUV has fallen from first to sixth place in the ranking of vehicles with the highest rates of insurance claims for theft. "General Motors has put a lot of effort into new antitheft technology, so that may help explain the decline in the Escalade’s theft rate," says HLDI Vice President Matt Moore. "On the other hand, sales of the Escalade have fallen in recent years, so there may be less of a market for stolen Escalades or Escalade parts." Thieves continue to target large pickups and large SUVs at higher rates than other vehicles. No. 1 on this year’s list, the four-wheel-drive F-250 crew cab, has a claim frequency of 7 per 1,000 insured vehicle years, or nearly 6 times the average for all vehicles. An insured vehicle year is one vehicle insured for one year, two for six months, etc.