I have an 08 Duramax. This summer the ac started to kick on and off at idle. Mechanic says it is the Intercooler and that it’s not gettting good airflow. My pressures are too high. Some things that have been replace in the last few months is the injectors, new turbo, radiator, condenser. Everything I’ve read about the Intercooler does not mention how it effects the ac. Any suggestions. Or feedback?