MNJWS Blower Motor Resistor Control Module for 2003-2007 GM Trucks SUVs — Direct-Fit, Restores Multi-Speed Fan

If your vehicle’s HVAC fan only runs on one speed or stops altogether, the blower motor resistor (also called a blower control module) is often the failing component. This MNJWS replacement matches the OE mounting points and electrical connections for compatibility with a long list of GM models, offering an affordable way to bring back full blower control without visiting a dealer.

How will this module fix inconsistent fan speeds?

The resistor regulates current to the blower motor so the fan can operate at different speeds. When the original resistor heats up, burns out, or develops an open circuit, some speed positions fail or the fan works only on high. Swapping in this MNJWS module restores proper resistance values and allows the HVAC controls to select low, medium, and high blower settings again.

• Replaces failed resistor that limits current to the blower motor
• Restores low/medium/high speed functionality
• Direct-fit electrical connector and mounting holes for easy replacement

Which vehicles and part numbers does this fit?

Designed for many GM trucks and SUVs from model years 2003–2007, this module fits Chevrolet Silverado, Suburban, Tahoe, Avalanche, Trailblazer; GMC Sierra, Yukon, Envoy; Cadillac Escalade; and Buick Rainier where the OEM part numbers match. It replaces numerous aftermarket and OEM references so you can cross-check fitment before purchase.

• Compatible with 2003–2006 Silverados, Suburbans, Tahoes, Avalanches and select 2007 classics
• Cross-replaces GM numbers like 89018778, 52495874 and many common aftermarket codes
• Check your vehicle’s part number list to confirm exact match

Is installation difficult and what tools are needed?

Installation is straightforward for a basic DIYer: remove the glove box or lower dash panel to access the blower housing, unplug the old module, unbolt it, and fit the replacement. Typical install time is 20–45 minutes, depending on access and whether any screws are seized. No special programming is required; the new unit functions immediately after connection.

• Standard hand tools: screwdriver, socket set, ratchet
• No dealer reprogramming—plug-and-play direct fit
• Includes 12-month warranty and basic replacement guidance

What quality and warranty assurances come with the MNJWS module?

MNJWS builds this resistor module to meet or exceed OEM standards using durable materials and tested circuits to handle blower current and heat. Although not a genuine GM or ACDelco branded part, it is engineered for reliable service life and backed by a 12-month warranty to protect against manufacturing defects.

• Engineered to OEM fit and function criteria
• Durable construction resists heat and vibration in HVAC housings
• 12-month warranty with customer support for fitment or performance issues

Who is this for? If you own a compatible Chevrolet, GMC, Cadillac or Buick from the 2003–2007 model years and are experiencing partial or complete blower failure, this MNJWS blower motor resistor is a cost-effective, user-installable replacement. It’s ideal for DIY mechanics wanting a reliable direct-fit module, fleet maintenance teams replacing aging HVAC components, or owners avoiding costly dealership repairs while restoring full climate control operation.