I ordered a 2010 GMC Terrain SLT2 W/3.0 V6 engine, to be built the week so 12/14/09.The Montana dealer says he can't order this unit with an engine block heater. These cars are built in Canada and all Terrains there come with engine block heater as standard equipment. In northern Montana this heater is a must. Why can't I get it here?? Please help me!!! Who can I contact at GMC or anyone else who might help??