2005 Chevy 1/2 Ton Model # 23221 Use straight lower brake arm. Use the illustrations below for reference to install the 901 in eight steps: 1.  Remove the lower retention strap from the accelerator arm and install as shown in illustration (1). 2. Attach the accelerator block on the accelerator arm as shown in illustration (2). 3.  Attach the lower brake assembly above the brake pedal at the position shown in illustration (3). 4.  Lift the brake arm and attach the column mount . 5. Attach the accelerator arm to the control handle . 6.Attach the lower retention strap to the upper short retention strap on the accelerator arm. 7. Attach the lower spring retention strap and adjust. 8. Safety Check Be sure to check that bolts and nuts are properly tightened, you should have full throttle and full brakes.       ***Vehicle can only be driven with the tilt steering wheel in the full up position or the next notch down from the full up position.***