07 gmc envoy denali ac stopped blowing air, replaced the blower resistor but now still no air comes out, like no powere through... so what next, what module needs replacing?

Since you did not list your year, 2 or 4 wheel drive, denali..etc.. this info wil be generic to a 2009 envoy 2WD..

Blower Motor Resistor

https://www.oreillyauto.com/shop/cooling---heating-16773/blower-motor-resistor-12386/1996/chevrolet/corvette?viewName=redirect%3A%2Fshop%2Fcooling---heating-16773%2Fblower-motor-resistor-12386%2F1996%2Fchevrolet%2Fcorvette


https://www.oreillyauto.com/shop/lighting---electrical-16777/relays-16479/a-c-relays-16537/blower-motor-relay-11581/1996/chevrolet/corvette?q=Blower%20Motor%20relay

please mark as helpful.. thanks

Duplicat question.

Doesn't have a resistor. It has a blower motor control processor. When they go bad, the blower motor defaults to always on (go figure that logic). Pull the AUX blower motor fuse until you can get a replacement. The processor is located back by the rear blower motor.
Blower motor wont shut off Ricks Free Auto Repair Advice

SOUND LIKE BAD BLOWER MOTOR RESISTOR.CHECK BLOWER MOTOR HI BLOW FUSE AND RELAY.YOU WILL NEED OWNERS MANUAL IN GLOVE COMPARTMENT TO LOCATED BLOWER MOTOR FUSES AND RELAYS.

Your problem is the Relay which is encased inside the Heater/AC Resistor Module. This is a very common problem with GMC and Chevy Trucks. The Relay's return spring fails and the relay is held closed by gravity. The only fix is to replace the Resistor Module. I have a 2004 Silverado and have replaced the Module 3 times and the Blower Motor twice. The Orange wire feeding the Module is always Hot (12V) and feeds the Relay Contact for Highest Blower Speed. Hence the Blower runs all the time even with the Key off and removed.

Check your fuses.

check the connections at the blower motor and blower resistor under the right sie of the dash. If the connections look green or burnt replace the resistor connector

Check Fuse #3 in the under hood fuse block it is the only common connection I can make.

Changing the blower motor resistor will solve the problem of the unchanging fan speeds and the blower motor having power when the ignition is turned to the off position. Beware that there are three different kinds of blower motor resistors. There is a manual, automatic, and a digital that in appearance is greatly different from the first two. The blower motor resistor is located on the passenger side below and behind the glove box. The kick-plate under the glove box will need to be removed by two screws and wha-la, behold is the motor and resistor.

wiggle the blower resistor wire harness it is next to blower motor bad about connector melting