Four Seasons
Resistor Block

Four Seasons 20299 HVAC Blower Motor Resistor - Front

Brand Four Seasons 20299
Position Front
Connector Gender Female / Male
Connector Shape Rectangular
Description Resistor Block
Meets / Exceeds OEM? Yes
Number of Terminals 7 / 2
Speed Fixed # 4
Terminal Type Pin/ Wire Lead
Type Switches
Product line Resistor Block
Fits Chevrolet, GMC, Isuzu, Buick, and Oldsmobile · 41 vehicles

OE direct replacement. Meets OEM standards for dependable HVAC blower control.

Resistor block design. Provides fixed speed control for consistent blower operation.

Rectangular connector. Female and male terminals support a secure electrical connection.

Cross-references Four Seasons 20299, 973008 and 973405 for the same application. See all 15.

$51.69Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $51.69
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Four Seasons 20299 Resistor Block

Four Seasons 20299 is a HVAC blower motor resistor block for vehicles that use fixed speed control for blower operation. It is built as a direct replacement resistor block with a rectangular connector layout and pin/wire lead terminals for service on the HVAC blower circuit.

Key Features

  • Brand: Four Seasons Resistor Block
  • Part number: 20299
  • HVAC blower motor resistor for fixed speed #4 operation
  • Connector gender: female / male
  • Connector shape: rectangular
  • Terminal type: pin / wire lead
  • 7 / 2 terminal configuration
  • Meets or exceeds OEM requirements

Product Details

The Four Seasons Resistor Block 20299 is used in HVAC systems to control blower motor speed through the resistor circuit. This resistor block is listed for Chevrolet Trailblazer, GMC Envoy, GMC Envoy XL, GMC Envoy XUV, Buick Rainier, Oldsmobile Bravada, Chevrolet Trailblazer EXT, and Isuzu Ascender applications across 2002-2009 model years. It is a direct-fit style replacement for service work where the original blower resistor has failed or the blower speed circuit is no longer operating correctly. Four Seasons 20299 also cross-references A07828 for the same application.

Common Issues This Part Can Address

  • Blower motor only works on one speed setting
  • Loss of one or more HVAC fan speeds
  • Intermittent cabin airflow from the blower circuit
  • HVAC resistor failure causing reduced fan control
  • Electrical resistance issues in the blower motor speed circuit

Installation Notes and Fitment

  • Fits 2007-2009 Chevrolet Trailblazer, N/A
  • Fits 2007-2009 GMC Envoy, N/A
  • Fits 2003-2008 Isuzu Ascender, front
  • Fits 2004-2007 Buick Rainier, front
  • Fits 2003-2006 Chevrolet Trailblazer, front
  • Fits 2003-2006 Chevrolet Trailblazer EXT, front
  • Fits 2002-2006 GMC Envoy, front
  • Fits 2002-2006 GMC Envoy XL, front
  • Fits 2004-2005 GMC Envoy XUV, front
  • Fits 2002-2004 Oldsmobile Bravada, N/A
  • Fits 2002 Chevrolet Trailblazer, front
  • Fits 2002 Chevrolet Trailblazer EXT, front

Verify the connector style and terminal layout before installation, especially on applications noted with ATC relay connector incompatibility to the HVAC blower motor resistor harness. Confirm the vehicle’s HVAC configuration and match the original resistor block before replacement.

Quality Assurance

Four Seasons 20299 is listed as meeting or exceeding OEM requirements for this resistor block application. The Four Seasons Resistor Block line is built for service replacement use in HVAC blower motor circuits.

This part fits 41 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2009ChevroletTrailblazerN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2009GMCEnvoyN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2008ChevroletTrailblazerN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2008GMCEnvoyN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2008IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2007BuickRainierFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2007ChevroletTrailblazerN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2007GMCEnvoyN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2007IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006BuickRainierFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006ChevroletTrailblazerFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006ChevroletTrailblazer EXTFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006GMCEnvoyFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006GMCEnvoy XLFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2006IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005BuickRainierFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005ChevroletTrailblazerFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005ChevroletTrailblazer EXTFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005GMCEnvoyFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005GMCEnvoy XLFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005GMCEnvoy XUVFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2005IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004BuickRainierFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004ChevroletTrailblazerFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004ChevroletTrailblazer EXTFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004GMCEnvoyFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004GMCEnvoy XLFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004GMCEnvoy XUVFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2004OldsmobileBravadaN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003ChevroletTrailblazerFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003ChevroletTrailblazer EXTFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003GMCEnvoyFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003GMCEnvoy XLFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003IsuzuAscenderFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2003OldsmobileBravadaN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2002ChevroletTrailblazerFrontResistor Block
2002ChevroletTrailblazer EXTFrontResistor Block
2002GMCEnvoyFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2002GMCEnvoy XLFrontATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
2002OldsmobileBravadaN/AATC relay connector incompatible with HVAC blower motor resistor harness.; Resistor Block
Directly replaces or cross-references 15 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 20299973008973405973410158177211120299153734371541578922807121890184398901860489019100A07828DR755MT1802