Personaly, I keep a transistor/shortwave radio in mine, as the ability to communicate will be important after all forms of mass electronic media go down. My radio was about $20 and I get signal as far away as Florida. (I'm in Houston, so that's like, totally far!)
My other preparing-for-the-apocalypse-fantasy involves dropping an old non-electronic diesel engine in a newer vehicle. Non-electronic diesel engines will survive EMP because they are purely mechanical.
Look, if your close enough to a nuclear explosion to be effected by an “emp” pulse, Worrying about your car stalling will be the last thing on your mind.
I think the flesh dripping off your arms will be a priority, if you can still see that is...