Chevrolet Malibu 2007 Malibu Owner's Manual page 94

If the frontal airbags inflate you will need to
replace the driver's and right front passengers
safety belt retractor assembly. Be sure to do so.
Then the new retractor assembly will be there
to help protect you in a collision.
After a crash you may need to replace the driver
and front passenger's safety belt retractor
assemblies, even if the frontal airbags have not
deployed. The driver and front passenger's safety
belt retractor assemblies contain the safety belt
pretensioners.
94
Have your safety belt pretensioners checked if
your vehicle has been in a collision, or if your
airbag readiness light stays on after you start your
vehicle or while you are driving. See Airbag
Readiness Light on page 204.