Why does the manual state that one can pull up to 8700lbs. if the tahoe can barely handle 3500lbs? the springs have been replaced twice the manifold is cracked the fuel pump went out, the universal joint is going out, the transfer case is leaking and has only been used twice in 3 years, and has already been repaired once last year, the steering pump is going out, these are only the problems i can think of. *jb