SINCE PURCHASING SUV NEW, I HAVE HAD 3 FAILURES TO CRANK DUE TO A DESIGN DEFECT IN THE HOT LEAD CABLES THAT ATTACH TO THE BATTERY. THE LEAD WASHER USED BETWEEN THE TWO LEADS BECOMES MISSHAPED AND LOSES THE ABILITY TO CAUSE A CONNECTION. THE DANGER TO HUMAN LIFE IS DIRECTLY RELATED TO WHERE THE DRIVER HAPPENS TO BE WHEN THIS CONNECTION FAILS TO OCCUR. I HAVE BROKEN DOWN AT HOME (WHICH WAS SAFE) , 200 MILES FROM HOME AT A HOTEL (WHICH WAS NOT SAFE) AND IN THE SCHOOL PARKING LOT. THIS IS A COMMON PROBLEM AMONG THE MANY I KNOW THAT HAVE GMC SUV'S OR TRUCKS THAT USE THIS DUAL HOT LEAD SYSTEM. IT IS A DEFECT IN THE DESIGN BECAUSE THE LEAD WASHERS THEY USE BECOME MISSHAPED OVER TIME. AS YOU CAN SEE I HAVE LESS THAN 35,000 MILES ON THIS VEHICLE. A VEHICLE WITH THAT MILEAGE SHOULD BE MORE DEPENDABLE. GMC SHOULD FIX THE DEFECT OR EXTEND THE WARRANTY FOR THESE FAILURES.*AK