Have you checked out TotalLoadControl™ air suspension?
We introduced TLC™ on the Z last year and have many happy customers.
Simply put - TLC uses the largest air springs ever used on a 1/2-ton truck and bigger is definitely better
. TLC will keep your truck level no matter what you haul or tow (of course, never exceed the GVWR). TLC is a patented air suspension represents a major advance in truck suspension.
And the TLC does not interfere with the smooth factory ride - in fact, TLC improves steering, handling and braking when hauling or towing heavy loads. We think your truck with TLC will perform better than what RAM has announced as their optional air suspension in 2013 - and you can have it on your truck now.
TLC is a bolt-on kit that can be ordered with an air compressor to easily inflate or deflate.
If you have any questions, please check us out on the Z vendor forum or on our website or shoot me a PM.