It did. I replaced the blower motor and blower motor resistor which has solved my HVAC problems. For my truck when you have the blower on max with both the AC and cabin circulation buttons pushed the flap behind the blower motor opens which makes the motor more audible. When you switch the blower dial down or push off the cabin circulation button the flap closes some or completely and the sound goes down some. The flap is used in cabin air circulation and for my year and make has no cabin filter, others may be different.