My situation is that the lower seat feels like its angled down in t back too much. I had to replace the seat cushion and spring and both GMC and the dealership says EVERYTHIGN is within specs.. but it still feels wrong. I too have purchase some seat foam material and plan on sculpting it into a wedge and place it under the seat cushion to raise the back of it up to a more comfortable angle. My question is does ANYONE know how to take the lower seat apart. the dealership tech said it was pretty easy. something about removing the outer kick panel then popping the fabric off and that gives you access to the cushion. No sure how to get the side kick panel off though ....