In this primer on how to replace a car key fob, Consumer Reports says getting another high-tech key fob can be a pricey proposition.

The latest key fobs for the Silverado are even built so that the key can be used as a screw driver. Older ones are less convenient, and some aftermarket fobs have the shell held in place by a screw.

New key fobs must be programmed with codes that the vehicle has to read before it unlocks the door or allows starting the engine.

Late Model Chevrolet Fobs Changing the battery in the latest-generation Chevrolet key fob, like the one for the current Chevrolet Silverado, is easy to do.

But maybe you’ve experienced the downside: The cost to replace the latest key fobs can be as much as $400 depending on the brand. Then add another $20 to $130 to program it to work with your car.

How to Replace Your Car's Key Fob Consumer Reports looks at what you should know before heading out to find an expensive new key fob.

Watch this video to see how to change the battery in your key fob. How to replace car key battery Most key fobs have a little slot you can use to pop them open with a small flatheaded screwdriver ...

Like anything else relying on a battery, you car key fob can die—often at the worst time. Thankfully, these batteries are easy to replace.