GMC Emvoy Blower Motor will not turn off

Envoy blower motor will not turn off. Turn car off, motor keeps running. No response from switch. Had to pull fuse to prevent battery drain

any thoughts ?

You didn't mention your model year or whether you have automatic or manual A/C. In any event, if you have Automatic A/C, you need a new blower motor control module. If it is Manual A/C, you need a new blower motor resistor.

Put the appropriate part in the search box above and you will get full info on replacement instructions. Cheap and easy fix.

C.B.