Yes. Check with the dealership for manufacturer's recommendations on how to go about doing this.
Yes
Yes. Any car can be flat towed, but some are easier to do this with than others. You should check with the Chevy dealer and get their recommendations on how it should be towed.
Can a 2011 Chev Impala be flat towed
The 2011 GMC Terrain has 16 valves.
Assuming you mean "flat" towed, yes
The 2011 GMC Terrain has an inline 4 engine.
The height of the 2011 GMC Terrain is 5 ft. 6.3 in. (66.3 in.).
The 2011 GMC Terrain has a 23.2 degrees angle of departure.
The 2011 GMC Terrain has a 14.8 degrees angle of approach.
The 2011 GMC Terrain has double overhead cam (DOHC).
The 2011 GMC Terrain's turning circle is 40.0 ft..
The maximum payload of the 2011 GMC Terrain is 1162 lbs..