I have a 2014 GMC Sierra SLT Crewcab, 2 weeks old. I have noticed that when I have the air recirculating in the cabin, outside air closed off, I still am smelling outside air, cigarette smoke from the next car while sitting at a light, bus exhaust, skunk smell. I also have a Buick Enclave ('11) and my old Silvefrado ('03) which did not permit outside air from entering the passenger cabin when the 'recirculate' button was in use.
I is almost like the 'door' is not closed completely. Has anyone else experienced this?