Have a 2000 Silohette. When you start it and it is cold (North Carolina type cold), it smells like the exhaust is being pumped into the van. If you set the heater on recirculate instead of fresh, it is a little better. Once the van warms up, or if it is warm outside, no smell. Any ideas what the problem may be and more importantly how to fix it!! THanks

have you had the exhaust system looked over for leaks? No tail pipe peices missing?