2005 GMC ENVOY Vehicle Speed Control Problems

I purchased my vehicle in oct of 2021 in Nov 2021 is when my car started failing my car started to lose power also started smoking from the lower passenger side no warning lights came on besides the oil warning light since Nov 2021 my car has been losing power it only goes up to about 40 m.p.h I have been smelling fuel coming from some where my tail and license plate light and back driver side inside car light stopped working the engine light turns on and off the steering wheel makes the car lose a little bit of power when I turn the wheel or when I roll up and down the windows or adjust my seat my ac does not work the back ac turns on by it's self to the heater does not work when I have it turned all the way to the 5 I...

This suv made a loud sound, began to drift, in the rear, at hwy speeds before it tipped over and began to roll, ejecting my two minor sons from the passenger cab before it eventually landed on its side. the roof was molded in a triangular shape, preventing it from resting on the roof as it tilted back onto inside and remains after the last roll The triangular shape was created in the metal after the stabilizing structures gave way almost immediately providing possibly no protection to the patrons inside the carrier cab of suv. demonstrating its inability protect its occupants.

VEHICLE WAS STATIONARY AND IN DRIVE WHEN IT HAD A UNCONTROLLED ACCELERATION RESULTING IN A COLLISION WITH A GARAGE WHERE IT WAS BEING PARKED. EXTENSIVE DAMAGE RESULTED TO THE HOME AND VEHICLE. NO INJURIES.

WHILE DRIVING MY 2005 GMC ENVOY MY SPEEDOMETER WILL STOP WORKING AND REGISTER AS 0 MPH EVEN WHEN I AM MOVING. IT ALSO HAS SHOWN ME TRAVELLING AT A MUCH HIGHER SPEED AT TIMES. THERE ARE MANY ISSUES WITH THIS THAT I'VE FOUND WHILE SEARCHING THE WEB. IT IS UNNERVING AND DANGEROUS TO NOT KNOW THE SPEED YOU ARE TRAVELING. I HAVE STARTED TO USE A GPS SYSTEM WHEN I DRIVE TO SHOW MY SPEED