What happens is the throttle plate gets carbon soaked when the engine gets shut off and causes bad idle issues to where that IAC motor starts surging which causes stalled issues.
There's just enough air flow at closed throttle to pass by that throttle plate and when it's dirty idle issue happen...
Sorry meant to say Idle Air motor {IAC} you can un plug it while engine is running and it should maintain base idle if not next steps would take a can of carb cleaner and spray clean the throttle body flapper with engine off using your finger and a rag.
I would say more in line with the air ide motor are dirty throttle plates, Doe's the check engine light come on? if so there should be a stored diagnostic code.
I have a 25 Badlands with gray interior it's so so, my wife has a 24 Badlands with tan interior that's has suede inserts it's alot nicer than the 25/26 interiors.
The way we flushed cooling systems at the shop remove lower radiator hose let everything drain then run fresh water through radiator until it clears up reattach lower hose fill with water run engine till thermostat opens shut off then remove lower hose flush radiator again with fresh water...
I'm using this with decent results, also this quick spray between waxing. https://www.amazon.com/dp/B0009H51B2?psc=1&ref_=cm_sw_r_cp_ud_ct_NTSEG5TV7T5C4MJQS3G2 https://www.amazon.com/dp/B095KYDBRL?psc=1&ref_=cm_sw_r_cp_ud_ct_NTSEG5TV7T5C4MJQS3G2_1