Costco Auto predicts GM promotion sales will top 52,000

#hashtags: #Costco #Buick #Cadillac #Chevrolet #GMC #Jan

Costco's auto sales arm is predicting that its members will purchase at least 52,000 new Buick, Cadillac, Chevrolet and GMC cars and trucks under a special 90-day promotion that will run Oct. 2 through Jan. 4.