Chevrolet 2010 HHR Owner's Manual page 116

The key has a bar-coded key tag that the dealer/retailer
or qualified locksmith can use to make new keys. Store
this information in a safe place, not in your vehicle.
If you are locked out of your vehicle, contact Roadside
Assistance. See
for more information.
See
information regarding Part 15 of the Federal
Communications Commission (FCC) Rules and
RSS-210/211 of Industry Canada.
Changes or modifications to this system by other than
an authorized service facility could void authorization to
use this equipment.
3-4
If there is a decrease in the RKE operating range,
try this:
Check the distance. The transmitter may be too
far from the vehicle. Stand closer during rainy or
snowy weather.
Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the left
or right, hold the transmitter higher, and try again.
Check the transmitter's battery. See Battery
Replacement later in this section.
If the transmitter is still not working correctly, see
your dealer/retailer or a qualified technician for
for
service.
The Remote Keyless Entry (RKE) transmitter functions
work up to 60 feet (18 m) away from the vehicle.
There are other conditions which can affect the
performance of the transmitter. See
.