@Wakshaani Please don't make GridGuide too pervasive or mandatory. A lot of people like being hot-shot drivers, and/or buffing up their vehicles, and chase scenes can be a lot of fun when they work well. Too much GridGuide means having to really stretch willing suspension of disbelief in order to have some good pink mohawk fun. And honestly, in a dystopian setting nothing should work that well, part of the point of the whole world is that pettiness and greed and fear and so forth taint everything.
I'll be addressing that in (Future Product) if it gets greenlit. There's a big difference between what Joe Salaryman has and Sarah Shadowrunner. Your local Shadowmechanic will be all about, "Alright, step one..." *reaches under the hood, yanks out a giant chunk of wires and sparks, "...this has got to go."
Don't worry on that front.
As for GridGuide(tm) and GridLink, here's the difference (and why I was gonna kill Link off)
GridGuide(tm) is a way to control your vehicle, folding it effortless into the citywide traffic flow.
GridLink is a metal connector from your car that connects to the city's power grid, charging your car while you drive. It does not, ina ny way, shape, or form, control your car.
(This is how they worked back when they were invented. It's gone a bit off the, uh … rails … since then, but this would be getting it back to those roots.)
Needless to say, having live power coursing through the city streets for a moving vehicle to tap into is … well, "Dangerous" is too soft a word. Better, by far, to have charging stations. There's a HUGE host of reasons why to do this and nearly as many why live power feed from the stretes is a bad, bad idea.
As for all cars havng GridGuide(tm)? It'll be standard issue at some point for all but certain cars. When that happens, they'll be a big ol' fluff note about it and talk about how to buy cars from before the changeover. Again, Shadowrunners look for options that normal people don't. Ways to cut the feature off/remove it and similar adjustments (cough) would be in the same area.
I'm a huge proponent of the Rule of Cool and, while today, we have electric cars that can match speed and acceleration with gas cars, in Shadowrun, gas-burners always go faster. Why? Because they're loud and belch smoke and so on. So a crook with a big loud obnoxious engine with pipes sticking out? Always faster than an electric car. (They also jump over creeks better. Yeee-haw!)