One problem related to headlights has been reported for the 2000 GMC Jimmy. The most recently reported issues are listed below.
Head lights and air conditioner blower come on when motor was not running. Took vehicle to dealer twice, dealer couldn't find cause. Also, driver's, passenger's, and backseat squeaked/air conditioner had mildew in evaporator case, and warpped brake rotors. Consumer trying to return vehicle to GMC.