How to Replace Heater Blower Motor 01-02 GMC Sierra 2500 HD
Difficulty: Intermediate · About 40 min · Gmc Sierra
Replace the heater blower motor on a 2001–2002 GMC Sierra 2500 HD by removing the lower dash cover and motor retainer, then securing and testing the replacement.
Tools you will need
- 7mm socket
- 7/32-inch socket
- T25 Torx driver
- Ratchet
Parts and supplies
- Heater blower motor
Steps
- Remove the lower dash cover
Remove the four 7mm fasteners holding the under-dash cover and lower the panel to access the blower assembly. Support the cover as the last fastener comes out.
- Disconnect the motor and resistor
Unplug the blower motor and resistor connectors by releasing their locks. Check the terminals for damage and keep the wiring clear of the fan opening.
- Remove the blower assembly
Take out the blower's 7/32-inch mounting fasteners and the screws securing its retainer. Lower the motor carefully from beneath the dash, noting the retainer orientation.
- Position the replacement motor
Align the replacement blower with the housing and guide it upward into place. Reinstall its fasteners and tighten them evenly to the vehicle's specification.
- Reconnect and test the system
Reconnect the motor and resistor wiring, then refit the lower dash cover with its four fasteners. Run the fan at several settings and listen for contact or abnormal noise.
Check your vehicle’s repair manual for exact specifications and fit.