1999 Dodge RAM 1500

SEVERAL CRACKS ALL ALONG DASH BOARD FROM WINDOW SEAL TO FRONT OF AIRBAG/VENT SECTIONS, WHEN I SHOWED THE DEALER WHO I BOUGHT IT FROM, THEY BRUSHED ME OFF LIKE I WAS COMPLAINING OF COSMETIC DAMAGE. I CONSIDER THESE CRACKS A MANUFACTURER DEFECT THAT HOLD VITAL COMPONENTS IF I OR MY PASSENGERS WERE EVER IN A WRECK, MY VEHICLE INTERIOR WAS IN EXCELLENT CONDITION WHEN I BOUGHT IT FROM THE USED LOT IN OCTOBER 2001, I CAN'T SAY THE SAME FOR THE MECHANICS. THE FIRST DAY I HAD TO RETURN IT FOR THE HARMONIC BALANCER, THEN THE EMERG BRAKE LIGHT STAYED ON, THEN THE ABS BRAKE LIGHT WHICH LEAD TO REPLACEMENT OF DRUMS,ROTORS, AND CALIPERS. IN FEB 2003 I HAD TO TAKE IT IN FOR WINDSHIELD WIPER MOTOR BURN OUT, AND THIS LAST MONTH THE WATERPUMP WENT OUT. CAN YOU ADVISE ME AS TO WHAT IS NORMAL WEAR AND TEAR AND WHAT PARTS AREN'T SUPPOSED TO HAVE TO BE REPLACED ON A VEHICLE THAT NOW HAS 82,000 MILES AND REGULAR UPKEEP? AND IF THE SOUND OF AIR BLOWING THRU LOOSE METAL IS WHAT MY TRUCK SHOULD SOUND LIKE WHEN I ACCELERATE FROM A NORMAL STOP? THANK YOU FOR YOUR TIME,AMBER. *AK