2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 68

3-20 Seats and Restraints After the adjuster is set to the desired position, try to move it down without pushing in to make sure it has locked into position. They can help tighten the safety belts during the early stages of a moderate to severe frontal, near frontal, or rear crash if the threshold conditions for pretensioner activation are met. And, if the vehicle has side impact airbags, safety belt pretensioners can help tighten the safety belts in a side crash or a rollover event. Pretensioners work only once. If the pretensioners are activated in a crash, the pretensioners and possibly other parts of the safety belt system will need to be replaced. See Replacing Safety Belt System Parts after a Crash on page 3‑24. Safety Belt Pretensioners If the GVWR (Gross Vehicle Weight Rating) of the vehicle is below 3 855 kg (8,500 lb) then the vehicle has safety belt pretensioners for the front outboard occupants. See Vehicle Load Limits on page 9‑12 to locate the certification label which contains the GVWR. Although the safety belt pretensioners cannot be seen, they are part of the safety belt assembly. To move it down, pull on the center adjuster control labeled PULL. You can move the height adjuster up just by pushing up on the shoulder belt guide.