TRANMISSION REPLACED BY PITRE, UNDER WARRANTY. SECOND TRANSMISSION FAILED THIS SUMMER. REASON? CRACKED HOUSING. NOTHING WRONG WITH MECHANICAL. I CONTACTED GM AND THEY WOULD DO NOTHING. I HAD TO REPLACE THE TRANSMISSION ONCE AGAIN. THE VEHICLE HAS NOT BEEN IN A COLLISION. I FEEL THE HOUSING IS FAULITY. NOW THE A/C UNIT FAILED. I WILL NEVER BUY ANOTHER GMC PRODUCT.