Safety Belt Pretensioners; Safety Belt Extender - GMC 2007 Sierra Owner's Manual

Safety Belt Pretensioners

Your vehicle has safety belt pretensioners for the
driver and right front passenger. Although you
cannot see them, they are part of the safety belt
assembly. They 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 your
vehicle has side impact rollover airbags, safety belt
pretensioners can help tighten the safety belts in a
side crash or a rollover event.
Pretensioners work only once. If they activate in a
crash, you will need to get new ones, and
probably other new parts for your safety belt
system. See Replacing Restraint System Parts
After a Crash on page 105.
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Safety Belt Extender

If the vehicle's safety belt will fasten around you,
you should use it.
But if a safety belt is not long enough, your
dealer/retailer will order you an extender. When
you go in to order it, take the heaviest coat you will
wear, so the extender will be long enough for
you. To help avoid personal injury, do not
let someone else use it, and use it only for the
seat it is made to fit. The extender has been
designed for adults. Never use it for securing child
seats. To wear it, attach it to the regular safety
belt. For more information, see the instruction
sheet that comes with the extender.