How to Replace the Key Fob Battery in a Chevrolet Cobalt

Steps from the 2010 Chevrolet Cobalt owner's manual.

Separate the transmitter by inserting a flat, thin object into the notch on the side.
Remove the old battery without using a metal object.
Insert the new CR2032 or equivalent battery with the positive side facing up.
Snap the transmitter back together.

Replace the battery when the KEY FOB BATT LOW message displays in the DIC.
Do not touch the circuitry on the transmitter, as static could damage it.

Source: 2010 Chevrolet Cobalt owner's manual, PDF page 112. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.

Confirm with your own manual, dipstick or door-jamb label.
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