2005 GMC Envoy SLE blower fan speed #5 is not working

Might be the Resistor pack located close to the blower. It has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.

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.

The blower motor is located behind the glove box. Open the glove box and at the left rear is a wire catch mechanism, push on this and the box will move further down. The motor and blower motor resistor module can be accessed here. Does the blower work on any of the speeds? If yes, then suspect the resistor module. If no, check for a blown fuse or bad motor.

If high speed went out first, then it is the switch.
There is the most arcing in the switch at high speed.
If there was motor or relay trouble, it would effect all speeds.
If there were problems with the ballast resistor, it would effect lower speeds.

if the other speeds work it is probably the blower resistor; if applies varying resistance to the voltage running the blower; this allows the fan to run at different speeds; should be located very close to the blower motor; behind a panel under the passenger side of the dash

this problem is caused by a defective blower speed control resistor, it is located near the blower motor, very cheap to replace, part is around $35

all speeds??? could be resistor pack or the blower itself. rap on the blowe and see if it tries to run, if it does, replace it.

If only some of the fan speeds work this is always the blower motor resistor located in the hvac case inside the right front of the vehicle where your passenger feet would be.the blower motor resistor is available at most larger parts places.I replace 2 or 3 of these a week. Good luck

if u replaced the blower resister,then ur fan speed switch is bad

It sound like to control panel switch. Can you get to the back of the control panel??? If so, bypass the switch, and connect the two wires with a jumpper wire to see if it start blowing????