And if so how do you get to it to replace it? The old man's '97 C1500 WT has been not blowing the most air volume lately and he lives on a gravel road. He's owned the truck since new so if the truck does have a cabin filter I know it's never been changed. If this truck has one, where is it? I'd like to help him with this one.

 

no cabin filter. probably stopped up evap core.

 

he may have a nest buildup in the blower motor.

 

Anyone have a dash diagram as to where the ac evap is located? How hard is this to get to?