Heating and air conditioningModel years 2003–2006ManufacturerGovernment
HVAC blower motor resistor module / connector overheating
2003-2006 GMC Yukon, Yukon XL (and Avalanche, Suburban, Tahoe; 2003-2007 Silverado, Sierra) with manual HVAC (RPO CJ3) or heavy duty heater (C42). GM Special Coverage 10240A; Transport Canada recall 2011074.
FaultCrate・HVAC blower motor resistor module / connector overheating
This may be accompanied by a burning smell or smoke.
The blower may run continually with the ignition off.
The terminal interface between the relay resistor module and its power connector may be unable to carry higher current for sustained blower operation.
Moisture and contaminants may enter the fresh air intake plenum and reach the module's circuit or corrode the terminals.
Road de-icing materials are among the contaminants that may enter the fresh air intake plenum.
What to do
- Dealers install a new blower motor resistor and resistor module connector.
- Cut the wires back far enough to remove any melted insulation.
If left
- The relay resistor module or wiring connector could overheat and the HVAC blower may not function on certain blower settings or may be inoperative.→ loss of blower speeds / blower inoperative
- These warning signs could in some cases be leading indicators of an impending vehicle fire.→ vehicle fire
Caution
- The connector must be replaced even if it was replaced in an earlier repair.
In the records
- Airbag Sensor: replaced 1（result not stated: 1）
- Blower Resistor: replaced 1（result not stated: 1）
- Power Connector: replaced 1（result not stated: 1）
- Rear Shock: replaced 1（result not stated: 1）
Applies to
- The special coverage applies to 2003-2006 GMC Yukon and Yukon XL (and the other listed trucks) with manual HVAC (CJ3) or heavy duty heater (C42).
- The special coverage covers the condition for 10 years or 150,000 miles (240,000 km), whichever occurs first, from the in-service date, regardless of ownership.
See the evidence (2 documents, 12 passages)
| Document | Publisher | Date |
|---|---|---|
| [1]Bulletin 10240A: Special Coverage Adjustment - HVAC Blower Not Fully Functional or Inoperative ↗ | ManufacturerGeneral Motors (filed with NHTSA) | 2012-01-01 |
| [2]Recall 2011074: HVAC blower motor resistor module overheating | GovernmentTransport Canada | 2011-02-21 |
Applies toThe special coverage applies to 2003-2006 GMC Yukon and Yukon XL (and the other listed trucks) with manual HVAC (CJ3) or heavy duty heater (C42).
MODELS: 2003-2006 Chevrolet Avalanche, Suburban Tahoe 2003-2007 Chevrolet Silverado 2003-2006 GMC Yukon, Yukon XL 2003-2007 GMC Sierra Equipped with Manual HVAC (CJ3) or Heavy Duty Heater (C42)— [1] p.1
Why it happensThe terminal interface between the relay resistor module and its power connector may be unable to carry higher current for sustained blower operation.
the interface between the electrical terminals of the relay resistor module and the wiring connector that powers the module may be incapable of conducting higher current levels for sustained periods of blower motor operation.— [1] Condition
Why it happensMoisture and contaminants may enter the fresh air intake plenum and reach the module's circuit or corrode the terminals.
In addition, moisture and other contaminants may enter the fresh air intake plenum and contact the internal circuit of the module or corrode the terminals.— [1] Condition
If leftThe relay resistor module or wiring connector could overheat and the HVAC blower may not function on certain blower settings or may be inoperative.
If any of these were to occur, the relay resistor module or wiring connector could overheat and the HVAC blower may not function on certain blower settings or may be inoperative.— [1] Condition
First signsThis may be accompanied by a burning smell or smoke.
This may be accompanied by a burning smell or smoke.— [1] Condition
First signsThe blower may run continually with the ignition off.
The HVAC blower may run continually with the ignition in the OFF position— [1] Service Procedure
RepairDealers install a new blower motor resistor and resistor module connector.
Dealers are to install a new blower motor resistor and resistor module connector.— [1] p.1
CautionThe connector must be replaced even if it was replaced in an earlier repair.
Connector replacement is required even if the connector was replaced on a previous service repair.— [1] Service Procedure step 3
RepairCut the wires back far enough to remove any melted insulation.
Cut the wires back far enough from the connector to eliminate any melted insulation on the wire.— [1] Service Procedure step 5
Applies toThe special coverage covers the condition for 10 years or 150,000 miles (240,000 km), whichever occurs first, from the in-service date, regardless of ownership.
This special coverage covers the condition described above for a period of 10 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.— [1] p.1
Why it happensRoad de-icing materials are among the contaminants that may enter the fresh air intake plenum.
moisture and other contaminants (such as road de-icing materials) may enter the fresh air intake plenum— [2]
If leftThese warning signs could in some cases be leading indicators of an impending vehicle fire.
These warning signs could, in certain instances, be leading indicators of an impending vehicle fire, which could result in property damage and/or personal injury.— [2]
Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.
Records under this issue 6
Owner complaint 4Recall 1Manufacturer communication 1
Look into the records of this issue (6)List the records (6 that can be opened)
Records whose recall number, document number or text matches. Each line says why it matched.
- HVAC Blower Motor Resistor Module OverheatingRecall 2011-02-21・recall number matches
- General Motors HVAC Blower Service CampaignManufacturer communication 2011-06-27・document number matches
- Blower motor resistor failed; no air or heat for 3 yearsOwner complaint 2015-01-17・text contains "BLOWER MOTOR RESISTOR"
- Ventilation system malfunction with blower continuing to run when vehicle is offOwner complaint 2014-07-01・text contains "RESISTOR MODULE"
- Brake pedal mushy and brake fluid leak, with transmission line leakOwner complaint 2014-02-07・text contains "BLOWER MOTOR"
- Rear air conditioner malfunctionOwner complaint 2011-08-11・tied by reading the record: “THE CONTACT ALSO RECEIVED AN ADJUSTMENT OF SERVICE NOTICE FROM THE MANUFACTURER AND THE AIR CONDITIONER IN THE FRONT WAS REPAIRED, BUT NOT THE REAR. THE DEALER REPLACED THE POWER CONNECTER AND THE RESISTER BLOWER.”