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Loud Whining from HVAC Blower in 2017 Canyon

0

Mike T. · rep 0 · May 22, 3:47 AM · 1 replies · solved · Question

Vehicle: 2017 GMC Canyon SLE

Hello fellow Canyon owners,

I've got a 2017 GMC Canyon SLE, and recently I've noticed a really loud whining or squealing noise coming from the dashboard area, specifically when the HVAC fan is on. It's most noticeable on medium to high fan speeds, and it's getting progressively worse.

It sounds like a dying motor or something rubbing. The air still blows fine, but the noise is incredibly annoying. I'm wondering if this is a common issue with the blower motor in these trucks, or if it could be something else entirely.

Has anyone dealt with this before? Is it something I can tackle myself, or should I just take it to a shop? Any tips on diagnosing or replacing it would be great!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:47 AM

0

ClearTheCode admin answer:

  1. Identify the Noise: A loud whining or squealing noise from the dashboard when the HVAC fan is on is a classic symptom of a failing blower motor in your 2017 GMC Canyon. This is a relatively common wear-and-tear item.

  2. Common Causes:

    • Worn Blower Motor Bearings: Over time, the bearings within the blower motor can wear out, causing friction and producing a high-pitched whine or squeal.
    • Debris in Blower Housing: Leaves, dirt, or other foreign objects can get into the blower motor housing and rub against the fan blades, creating noise. This is less likely to be a consistent whine but can cause intermittent scraping or rattling.
    • Failing Blower Motor Resistor: While a failing resistor typically causes issues with fan speeds (e.g., only working on high), it's less likely to cause a direct whining noise from the motor itself.

  3. Diagnostic Steps:

    • Listen Closely: Try to pinpoint the exact location of the sound. The blower motor is usually located on the passenger side, under the glove box.
    • Vary Fan Speed: If the noise changes pitch or intensity with fan speed, it strongly points to the blower motor.
    • Inspect for Debris: You can often access the blower motor by removing a few screws from the panel under the glove box. Check for any visible debris.

  4. When to See a Shop (or DIY):

    • DIY Potential: Replacing a blower motor in a GMC Canyon is often a manageable DIY task for someone with basic mechanical skills. It typically involves removing the under-dash panel on the passenger side, disconnecting the electrical connector, and unbolting the old motor.
    • Tools & Parts: You'll need basic hand tools (screwdrivers, sockets) and a new blower motor (OEM or a reputable aftermarket brand). Ensure you get the correct part for your specific model year.
    • Shop Visit: If you're uncomfortable working under the dash, or if the noise persists after checking for debris, a professional shop can quickly diagnose and replace the motor. They can also rule out other less common issues like a faulty HVAC control module.
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