Here's how you can typically add a remote:
* Purchase a new compatible remote: You'll need a remote specifically designed for a 2008 Chevy HHR. You can find these at dealerships, auto parts stores (like AutoZone, Advance Auto Parts, etc.), or online retailers. Make sure it's the correct frequency (usually 315 MHz or 433 MHz - check your owner's manual if you're unsure). Some remotes might be labeled as "factory" or "OEM" for original equipment manufacturer, indicating a closer match to the original.
* Programming the remote: There are two main ways to program the remote:
* Dealership Programming: This is the most reliable method. A Chevy dealership has the proper equipment and expertise to quickly program the remote correctly to your vehicle's system. Expect to pay a fee for this service.
* DIY Programming (if possible): Some 2008 HHR models *may* allow for DIY programming using a specific procedure involving the ignition and lock/unlock buttons. However, the process varies depending on the specific year, trim level, and even the option packages. Searching online for "2008 Chevy HHR remote programming DIY" will yield various results and potential procedures, but always check multiple sources and proceed cautiously. If you're not comfortable with this, a dealership is the safer bet. Incorrect programming can lock you out of your car entirely.
Important Considerations:
* Keyless entry system: Make sure you're working with the correct type of remote. Some HHRs had different keyless entry systems.
* Owner's Manual: Your owner's manual *might* contain instructions on programming a new remote, but it's unlikely to be detailed.
* Professional Help: If you're unsure about any part of the process, it's strongly recommended to take your car to a qualified locksmith or a Chevrolet dealership for programming. This prevents potential problems and ensures the remote is properly programmed.
In short, buying a replacement remote and getting it professionally programmed is the easiest and most reliable method. Trying to DIY program it carries the risk of failure.