Rainier CXL, Vortec 4200 4.2L I6 MPI DOHC, Leather, 17 x 7 8-Spoke Custom Aluminum Wheels, Steering wheel mounted audio controls, and Traction control. This great Buick is one of the most sought after used vehicles on the market because it NEVER lets owners down. Power and Associates gave the 2006 Rainier 4.5 out of 5 Power Circles for Overall Initial Quality Design Aluminum Wheels