95 c1500 5.0 liter keeps killing map sensors
 

it showed 33 code (map sensor) i replaced .month later did it again replaced lasted 1 day so im thinking pcm replaced it,showed a 44 code (o2 sensor) replaced drove good for about 10 miles then started lugging down,now shows 33 code again,,,any ideas i really want to keep this truck oh yeah 257000 miles