Alternator/generator/regulator problems of the 1996 Chevrolet Astro

We bought this van as a conversion van. We have been very unhappy with the perofrmance of the van. We have had the airconditing repaired twice. The battery failed many times. One time the alternator was replaced. There has always been a clonking noise when braking that the dealer can identify. The tires wore out just after they were a year old. The van has also been taken to the dealer for numerous other repairs. ( dot number: ).

Abs light is on, and when brakes are applied stopping distance is not normal. Dealer has been contacted. Consumer has had numerous repairs on vehicle, differential was overhauled, windshield wipers work intermittenly, fule injection system was repaired, ignition switch cylinder was replaced, as well as alternator, the entire abs system has been rebuilt, consumer states rattle sound from front of engine drivebelt was replaced as well as tensioner, also fule/air filter was replaced. Automatic transmission was replaced. Front and rear shocks were replaced.