i visually like the spelling of gauge over gage, but they both get the point across. in my tahoe, when you put the ign. in run, the dash light is "check gages" so both seem to be coming common. kinda like night and nite, colour and color, high and hi [like high temp -> hi temp] the computer age is making people lasy. it takes just a bit less time to type in one or two characters less so people do that.