If you do not have fan speeds it may be a fuse or the blower motor resistor. For help with the issue visit our enthusiasts forum at
www.trailvoy.com
the blower switch located behind blower motor is shot or burned up. it cost me about $30 dollars at auto zone and 5 minutes to replace. you out.
under the hood by the engine
if you lost one or two fan speeds you need to change the blower motor resister. it sells for around $60.00 at a dealer only.
Where is the neutral safety switch on a 2003 trailblazer?
The 2002 Chevrolet trailblazer heater fan relay switch is located behind the dashboard. The relay switch will be on the drivers side of the vehicle.
I had the same problem then the other ones went out. It was a relay switch located on the blower fan under the dash
If your Trailblazer is a 4x4 the switch should be to the left of the radio on the dash.
where is the O2 sensor on a 2002 chevy trailblazer
no
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
If you have no speeds at all, including high speed and you have power at the fuse and the fuse is good, I would suspect the heater blower speed switch and or the electrical plug to the switch is cooked. If you have high speed only and the rest are dead, I would suspect the blower motor speed resistor.
Never mind....It was the blower resistor shorted on hi......