My daughter's car, 2004 Buick Lesabre 148K, runs like a top; I've changed serpentine belts numerous times, GM OEM #12569591, Goodyear Gatorback, Dayco, Bando, the old OEM belt back on....I have 5 belts, 4 of them less than 10K each. No matter which belt I use, it runs for awhile after being...