2011 smelly A/C problems

[kyleag89]

I have a 2011 sierra and it has developed the all too normal with this body style smell in the A/C system.  I have searched and read many posts on this and have verified the drain is clear and I have also cleaned the evaporator coil with cleaning product.  It started at the end of last summer and I cleaned the evaporator and started letting the blower fan run for 2 min before shutting the truck off.  Well this summer is just starting and I already have the odor back!  I have owned over 30 vehicles in my life already and never had this issue once.  Does anyone know what the BAD design is on these trucks that cause this?  It's extremely annoying to remember and have to run the blower fan Everytime before shutting the truck off!

[swathdiver]

It's not the design.  It's how you use it and where you live.

 

A bi-directional scan tool can activate the "Afterblow" process.  This will dry out the evaporator when conditions are right.