suspention

[PITTSBURGHLTZ07]

Hi all.... ive owned my 2007 tahoe ltz for 3 days now lol on day 2 the service suspension soon notification came on and i was hearing a clunking coming from the pass rear? it only does it when the notification is displayed???which isnt all the time. when its not displayed and i hit bumps it sounds normal. i had a 2004 with autoride before this and i just put my own set of bags in the back and disabled autoride. but it seems the newer tahoes are a little more touchy. i found out that resistors which i already purchased can be installed where the solinoid wires are to trick the system which is what im gonna do. but the couple questions i have are 1.... what is the clunking i hear and why does it only do it when the notification is on???? is this because they are electric controlled shocks.....and 2 what normal shocks can i get to replace the electric ones in the rear....brand part# cost? thanks in advance!