One of the front wheel hub and bearing assemblies is bad and it chewed up the abs speed sensor. Don't drive any further than your nearest garage for repair.
The GMC Envoy was produced in 1998 and not again until 2002. The Envoy was produce until 2009. GMC is no longer producing a vehicle with the name Envoy.
I know this sounds silly, but check your e-brake. It will often do that when you have no tires on the wheels.
it depeneds on the size of the motor in the vehicle
BOTTOM OF VEHICLE NEXT TO THE FUEL TANK.
What do you mean you can't put gas in the vehicle? Why not?
Your forward gears are out in your transmission I recommend you take it to a shop.
Look under the vehicle - follow the fuel line from the tank
check this site 1st its not a straight forward job.. http://forums.trailvoy.com/search.php?searchid=1710816
Have vehicle scanned to determine the problem and have codes cleared
You would need to tell us the mileage of the vehicle, and the exact version. You did not do that.
The 2004 GMC Envoy can hold up to seven quarts of oil at one time. Before refilling the oil in your vehicle, make sure to drain all the old oil out.
A 2006 GMC Envoy can be bought at a car dealership that offers used vehicles. Before one buys this or any used vehicle, it is recommended to research the blue book pricing through a reliable source.