2004 Chevrolet TrailBlazer LS EXT 6cyl. I am having my Rack and Pinion replaced for the second time in two weeks. I am returning the first used replacement I purchased. What tricks are there to get the most life out of the truck and keep her on the road for years on? The replacement is used and 1,000 miles on it. I'm using Lucas Power Steering Stop Leak to help keep the seals tight. Please help me. I love my truck.