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Peterbilt 587 HVAC Blower Motors

Peterbilt 587 Hvac blower motors

Starting at low prices, AutoBuffy stocks multiple HVAC blower motor options for the Peterbilt 587 from brands including top OE-quality brands. The blower motor is the fan that pushes conditioned air through your vents for heat, A/C, and defrost. When it fails, airflow stops or becomes erratic, leaving you without climate control in any weather.

Signs your Peterbilt 587 needs a new HVAC blower motor

  • No air comes from the vents at any fan speed setting, even though the A/C or heat is on
  • Airflow only works on certain fan speeds — commonly high speed only — because the resistor or motor windings are failing
  • A loud squealing, rattling, or grinding noise from behind the dashboard that changes with fan speed
  • Burning or musty smell from the vents when the blower is running, indicating a failing motor or debris caught in the fan cage
  • Blower motor cuts in and out intermittently, especially after the cabin warms up, pointing to a heat-sensitive electrical fault
  • Weak or reduced airflow on all settings even though cabin air filters are clean and ducts are unobstructed

Which HVAC blower motor should you buy for your Peterbilt 587?

The main decisions are OE-replacement versus premium grade, and whether to buy the motor alone or as a pre-assembled unit with the fan cage already attached. Choosing the right configuration saves installation time and avoids compatibility issues with the Peterbilt 587's housing.

OE-Replacement Motor (motor only)
Best for
Budget-conscious owners who can reuse the existing fan cage
What you get
Direct-fit motor matched to factory specs; you transfer your existing squirrel-cage fan
Motor + Fan Cage Assembly
Best for
Fastest swap or when the cage is cracked, out of balance, or corroded
What you get
Pre-balanced fan already mounted; drop-in install with no parts transfer needed
Premium / Heavy-Duty Motor
Best for
High-mileage vehicles or climates with extreme heat or cold
What you get
Upgraded brushes and thermal protection for longer service life beyond stock
Remanufactured Motor
Best for
Owners wanting a middle ground between new and budget pricing
What you get
Rebuilt to OE specs, often with a warranty; cores may be required for exchange

Replacing the HVAC blower motor on a Peterbilt 587

Easy⏱ 1–2 hoursScrewdrivers (flathead and Phillips)Trim panel removal tool or pry toolSocket and ratchet setNeedle-nose pliersFlashlight or work light

The blower motor on most vehicles is located in the HVAC housing under the passenger-side dash, held in place by a few screws and a wiring connector. After removing any trim panels and disconnecting the harness, the motor unbolts and pulls straight out — and if you bought a motor-only unit, the fan cage transfers to the new motor before reinstallation. Reconnect the harness, reassemble the trim, and test all fan speeds before considering the job complete.

Frequently asked questions

How much does it cost to replace blower motors on a Peterbilt 587?
Parts start at low prices for the Peterbilt 587 at AutoBuffy. Add shop labor of roughly one to two hours if you're not doing it yourself. Total out-of-pocket cost varies by grade — a basic OE-replacement motor is the most affordable route, while a motor-plus-cage assembly or premium unit costs more upfront but can reduce long-term comebacks.
Can I drive my Peterbilt 587 with a failed blower motor?
You can drive short distances, but it is not advisable for long. Without a working blower motor, you lose defrost airflow for the windshield and rear glass, which is a safety hazard in cold or humid conditions. Heat and A/C also become unavailable, making the cabin uncomfortable and potentially dangerous in extreme temperatures.
Why does my Peterbilt 587 blower motor only work on high speed?
This is almost always the blower motor resistor, not the motor itself. The resistor controls lower fan speeds, and it fails more often than the motor because it handles the most heat. Before replacing the blower motor on your Peterbilt 587, test or replace the resistor — it is a cheaper fix and a very common cause of this exact symptom.
How long does a blower motor last on a Peterbilt 587?
Blower motors typically last anywhere from 50,000 to over 100,000 miles, though lifespan varies with climate, cabin filter maintenance, and how often the fan runs at high speed. Clogged cabin air filters force the motor to work harder and shorten its life, so keeping filters fresh is the simplest way to protect the blower motor on your Peterbilt 587.
Do I need to replace the blower motor resistor at the same time?
It is good practice to inspect the resistor whenever replacing the blower motor on a Peterbilt 587. The two components work together and share similar service life. If the resistor shows heat damage, corrosion, or burn marks, replace it at the same time — the parts are inexpensive, and doing both jobs together avoids a second round of dashboard disassembly.
Is replacing a blower motor on a Peterbilt 587 a DIY job?
For most Peterbilt 587 owners with basic mechanical experience, yes. The blower motor is usually located under the dashboard on the passenger side and is accessible without removing major components. The job typically takes one to two hours. A motor-plus-cage assembly simplifies the work further since no fan transfer is required.

More parts for your Peterbilt 587

A/C CondenserHVAC Blend Door ActuatorShock Absorber SetHVAC System SwitchDiesel Exhaust Fluid (DEF) Urea FilterA/C Clutch Cycle SwitchSerpentine Belt Drive Component KitSteering Drag Link

Hvac blower motors for other Peterbilt models

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