i recently just put a new 6 inch super lift on my 2009 gmc 2500 and it’s not sitting at the height it should. I have the keys maxed out and it’s only a 1/4 inch higher the the rear which still has the 3 inch blocks. The lift came with 5 inch blocks but I can barley even get it level with the 3 inch. I called the lift company and they stated that my tortiom bars are worn out. Never heard of it so is it true that that’s the cause.