Chevrolet 2010 HHR Owner's Manual page 118

Press and hold for about one second to open the
rear driver side door.
Press and hold for about one second to open the
rear passenger side door.
Only RKE transmitters programmed to the vehicle will
work. If a transmitter is lost or stolen, a replacement
can be purchased and programmed through your
dealer/retailer. When the replacement transmitter is
programmed to the vehicle, all remaining transmitters
must also be programmed. Any lost or stolen
transmitters no longer work once the new transmitter
is programmed. Each vehicle can have up to four
transmitters programmed to it.
Replace the battery if the KEY FOB BATT LOW
message displays in the DIC. See KEY FOB BATT
LOW under
for additional information.
3-6
To replace the battery:
1. Separate the transmitter with a flat, thin object
inserted into the notch on the side.
2. Remove the old battery. Do not use a metal object.
3. Insert the new battery, positive side facing up.
Replace with a CR2032 or equivalent battery.
4. Snap the transmitter back together.