Having Some Issues 2001 Gs430

[Rippaflow]

It's been snowing here as of late and after a drive to my work 2 miles away and back. Everything was fine. I parked my car. I had to move it, when I moved it the Speedometer stopped working. I've been using a Garmin GPS wedged into where the speedo is for speed reasons for the last couple of days.

Here's what I got-

-Dead Speedo

-Cruise Control works Fine (Tested with Garmin for speed, Speed remained consistant +/- 1.)

-All MPG information in the Stock Navi is at 0.00 and Mileage to empty is the same since then.

-All functions in the Navi still lock out when the car is in motion

-VSC/ABS/VSC Off lights are on in the vehicle, but we're on prior

Another thing, this has only happened since this happened, on 3-4 occasions, The navigation thinks I'm in some random street in Washington DC and freezes for about 3-4 minutes. Same roads I always drive on, and it claims to not have a GPS signal during such time. All functions that are normally blocked out when the car is moving all function. If I put in an address it will navigate me from whereever in Washington, DC to where I select. Eventually it straightens out, but still is a little slow/jumpy at times.

I would think if the VSS is the culprit...cruise control wouldn't work for one. In our cars do they trigger ABS/VSC/VSC off lights or a CEL?

I have pulled the negative battery cable and reset everything to no avail. Also, gas gauges seems overly sensitive on peddle input when getting low. Once the car is below a 1/4 of a tank, if I'm on the gas, it will drop low enough the gas light will flicker on. When I left off the gas, the needle jumps from the E line to a 1/4th tank again. When the car has more than that, its fine. Recent repair work involves upper control arms and the differential was replaced about a month ago.