I purchased my new 2001 SLT shortbed cummins 6spd high output on August 25th and have 658 miles on it. i love the truck but my lower back is killing me, the fixed lumbar support( i don't have the lumbar adjustment) hits me right in the butt instead of the lower back, i can last about an hours drive before my back ache is killing me. i am 6ft and only weigh 160 lbs so i think the problem is that i don't sink down very far in the seat and therefore the lumbar support is too low. has anyone else had this problem and how did the dealer or manufacturer solve it. thanks john skalet-Denver