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The blower motor is inside the heater core box on the firewall. It is not a simple job and usually will take 4 to 6 hours labor to correct a bad motor issue, What is the precise problem you are having? If you do not have some of the speeds, the problem may only be the motor resistor pack which is outside and easily accessible.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7