Standard - Just The Facts
Just The Facts
Accelerator Pedal Sensors
Air Charge and Manifold Temperature Sensors
Airbag Clock Springs
Anti Lock (ABS) Sensors
Anti Lock Brake (ABS) Sensors Testing
Barometric Pressure (BARO) Sensors
Brake Pad Wear Sensors
Camshaft and Crankshaft Position Sensors
Camshaft Synchronizer Assemblies
Coolant Temperature Sensors
COP Boot and Pigtail Socket Assortments
Daytime Running Light Kits
DIS Control Modules
Don't Get PO'ed with PO401 Codes
EGR Position and EGR Pressure Sensors
EGR Valves
Fuel Injectors
Fuel and Water Separator Sensor
Ignition Coil Testing
Ignition Coil on Plug (COP)
Knock (Detonation) Sensors
MAF (Mass Air Flow) Sensors
MAP (Manifold Absolute Pressure) Sensors
Oxygen (O2) Sensors
T Series Fuel Injector line addition
Throttle Position Sensors
Tire Pressure Monitoring (TPMS) Sensors
TPMS Service and Repair
Two or Four, That is the Question
Vehicle Speed Sensors
Vehicle Warning Lights
Water Intrusion and Premature Coil Failure (UF303)
YAW Rate Sensors

There are several questions concerning two General Motors Blower Motor Resistors. The resistors below are used on the same vehicles, with respect to year, make and model. To make things more complex, the Standard RU571 requires the original resistor mounting plate be discarded and the replacement unit bolt directly to the blower case. The GM replacement resistor is not the same as the OE part. Use the information below to help decide which resistor each vehicle requires.

Standard RU571
GM 89019088, Delco 15-81086
  • Discard the existing mounting plate to install the replacement unit
  • Mount this resistor directly to the blower case
  • This resistor has 4 mounting holes
  • In most cases, vehicles without a console will use the RU571
Standard RU371
GM 89019089, Delco 15-81087
  • This resistor mounts with no modifications
  • It has 2 mounting holes
  • In most cases, vehicles with a console will use the RU371
  • and may cause failure of the anti-lock braking system to operate safely and properly.

Application Data
06-02, 00-99 Cadillac Escalade
06-02 Chevrolet Light Truck Avalanche
06-99 Chevrolet Light Truck Fullsize Pickup
06-99 Chevrolet Light Truck Suburban/Fullsize Blazer/Tahoe
06-99 GMC Light Truck Fullsize Pickup
06-00 GMC Light Truck Suburban/Fullsize Jimmy/Yukon

GM TSB Information
GM TSB 05-01-38-012C concerns the failure of the OE blower
motor resistor and the subsequent damage to the vehicle harness connector. This TSB recommends replacement of the
vehicle harness pigtail when replacing the blower motor resistor. We offer this replacement pigtail as our Standard S-916. Please refer to the actual TSB for further details

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