I recently bought a 2006 GMC Savana cargo van to use as a work van and the only heater it has is the one under the dash in the front cab area. The cargo area has no heat and without a partition between the cab area and cargo area the heater under the dash doesn’t do much to heat the van. It already has a walk through heavy-gauge steel mesh cargo safety barrier behind the seats and I would really rather not have to replace the steel mesh barrier with a full solid partition. So does anyone have any ideas on how I can heat the cargo area?