Yukon XL Denali 2WD V8-6.2L (2011)
30. Remove and discard the intake manifold gaskets (514).
31. If replacing the intake manifold, perform the following steps, otherwise proceed to step 21 of the installation procedure.
32. Place the intake manifold on a clean work surface.
33. Reposition the brake booster vacuum hose clamp at the intake manifold.
34. Remove the brake booster vacuum hose from the intake manifold nipple.