rancher

I have a 2002 Grand Cherokee limited addition. All of a sudden after the vehicle is turned off I get popcorn popping sounds coming from the left side under the dash. It's not electrical and it is random , so of course it never happens when I take it to the dealer. Any info or suggestions would be gratefully appreciated.

polarman

Are the climate controls still working properly?

rancher

they seem to be working fine?

losingxinsight

My buddy has a GMC sierra and his heater box randomly pops after starting/stopping the engine. Maybe similar problem.

syncview

Maybe its because of the HVAC controls that operated by vacuum and you are hearing the vacuum switches backing off.