This morning I go out to start my truck and I put the key in and all I hear is just click, click, click. The only thing that was on was my cell phone and that is hardwired in. I thought it could be just the cold weather causing it. I was wondering if a block heater would help prevent this from happening again. It's a '95 F-250 460. I know block heaters are primarily for diesels, but is it possible for mine to need one? I live in NC and this year its been colder than normal, so that's why I suspect the weather. Thanks.