Having problems with your 2004 Chevrolet TrailBlazer ?
2004 trailblazer lost speeds 1 and 2 on the blower and then speeds 3 and 5 and then finally speed 4.
should i replace the blower motor switch............do i have a resistor pack under dash........and do i replace that ?
Sounds like a blower motor resistor to me.
Repair Help & Product Troubleshooting for 2004 Chevrolet TrailBlazer
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