A-NAFTULY HVAC Blower Motor Resistor 973-407 for Chevrolet Express & GMC Savana 1996–2014 — Direct-Fit, Manual HVAC Restore

A-NAFTULY 973-407 blower motor resistor restores multi-speed control to the HVAC fan in compatible Chevrolet, GMC and select Isuzu trucks and vans.

If your vehicle's heating or air-conditioning fan only runs on one speed, doesn't run at all, or behaves unpredictably, the blower motor resistor is a common and affordable component to check and replace. This A-NAFTULY 973-407 unit is a direct-fit replacement designed for manual HVAC control systems on a wide range of Chevrolet Express, GMC Savana, C-Series Kodiak/Topkick, and some Isuzu models listed for 1996–2014. It replaces multiple OEM part numbers and installs in minutes without specialized tools.

Which vehicles and original part numbers does this resistor fit?

This resistor is compatible with many GM van and medium-duty truck platforms and replaces a variety of OEM references. Always verify your vehicle year, model, and whether you have manual climate controls before ordering to ensure fitment.

• Chevrolet Express 1500/2500/3500/4500 (1996–2014) and GMC Savana 1500/2500/3500/4500.
• GM C4500–C7500 Kodiak/Topkick models (2003–2009) and select 2005–2008 Isuzu HTR/HVR units.
• Replaces OEM numbers such as 973-407, 1580560, 22941007, 89018770, 12135104 and related cross-references.

How does this blower motor resistor fix HVAC fan speed problems?

The blower motor resistor controls current to the fan motor, creating discrete speed steps for your vehicle's HVAC blower. When resistor elements fail, certain speed positions stop working or the fan runs only on high; replacing the resistor restores normal multi-speed operation.

• Restores low, medium and high fan speed stages for manual controls.
• Resolves symptoms like fan stuck on one speed or no airflow from vents.
• Prevents further strain on the blower motor by ensuring correct current regulation.

Is installation difficult and what tools are needed?

Installation is straightforward and designed as a direct OEM-style swap. The resistor module sits on the lower passenger side of the HVAC housing; removing a few screws and the electrical connector is typically all that’s required.

• No specialized tools or advanced skills needed—basic hand tools suffice.
• Direct replacement form, fit and function comparable to OEM parts.
• Typical install time: 15–30 minutes depending on vehicle access.

What warranty and support does A-NAFTULY provide?

Each resistor ships individually and is covered by A-NAFTULY’s warranty and customer support. If you encounter fitment or performance problems, reach out to the seller for guidance or replacement under the stated warranty.

• Package contains one A-NAFTULY blower motor resistor (973-407 compatible).
• 18-month limited warranty and 24/7 customer service available.
• Recommendation: confirm OEM reference and manual HVAC control before purchase.

Who is this for: This replacement blower motor resistor is aimed at owners and mechanics of Chevrolet Express and GMC Savana vans, GM Kodiak/Topkick medium-duty trucks, and compatible Isuzu models who need a reliable, OEM-style repair for manual HVAC systems. It's ideal for DIYers who want a quick, cost-effective fix for fan speed issues and for repair shops that require a direct-fit part that meets or exceeds factory specifications.