B064C - Understanding DTC B064C: Common Issues in 2015-2018 Chevrolet Silverado and GMC Sierra

Quick Answer

B064C means: B064C indicates an issue with the left seat heater control circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B064C? Address the problem soon to avoid further electrical issues.

Common Questions

What does B064C mean and how does it affect my car?

The B064C code refers to a malfunction in the left seat heater control circuit. This can lead to your seat heater not working, causing discomfort during colder months. If ignored, it may lead to further electrical problems.

What are the most common causes of B064C and how much does it cost to fix?

Common causes include a faulty seat heater element, damaged wiring, or a malfunctioning switch. Repair costs typically range from $50 for wiring repairs to $300 for complete element replacements.

Can I drive my car with B064C or should I stop immediately?

While it's generally safe to drive, it's advisable to address the B064C code soon to prevent potential electrical issues, especially if you rely on heated seats for comfort.

How can I diagnose B064C myself using GeekOBD APP?

You can use the GeekOBD APP to scan for diagnostic codes. Once you have the code, check the seat heater element and wiring. The app can help you monitor electrical signals while testing components.

What vehicles are most commonly affected by B064C?

Vehicles like the 2015-2018 Chevrolet Silverado and GMC Sierra frequently experience the B064C code due to their seat heating systems.

How can I prevent B064C from happening again?

Regularly inspect the wiring and connections for wear, avoid spilling liquids on the seats, and ensure proper maintenance of electrical systems to reduce the risk of B064C.

What is B064C?

The diagnostic trouble code B064C indicates a problem with the 'Left Seat Heater Control Circuit' in your vehicle, particularly prevalent in models like the 2015-2018 Chevrolet Silverado and GMC Sierra. This code signifies that the Body Control Module (BCM) has detected an issue with the left seat heater's electrical circuit. When the BCM receives abnormal input from the seat heater, it triggers this code. Real-world implications include a malfunctioning seat heater, which may not provide warmth during colder months, leading to discomfort for the driver and passengers. Additionally, ignoring this code can potentially lead to further electrical issues within the vehicle, particularly in the comfort and convenience systems. If your car is equipped with heated seats, it's essential to address this problem promptly. The B064C code could also be linked to a faulty seat heater switch, a damaged wiring harness, or issues within the BCM itself. Therefore, understanding this code is crucial for ensuring both comfort and safety in your vehicle.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B064C is present:

  • The left seat heater does not activate, leaving the seat cold, especially in winter.
  • The dashboard warning light for the seat heater illuminates, indicating a malfunction.
  • Intermittent operation of the seat heater, where it may work occasionally but fails at other times.
  • Unusual smells or sounds from the seat area when attempting to activate the heater.
  • Inconsistent heating levels, where the left seat heater is either too hot or not warm at all.

Possible Causes

Most common causes of B064C (ordered by frequency):

  1. Faulty seat heater element - 40% likelihood, often due to wear and tear or damage.
  2. Damaged wiring or loose connections - 30% likelihood, especially in older models where wiring may degrade.
  3. Malfunctioning seat heater switch - 20% likelihood; a faulty switch can fail to send the correct signals to the BCM.
  4. Body Control Module (BCM) issues - 10% likelihood; sometimes the BCM itself can malfunction, leading to incorrect readings.
  5. Less common cause: Short circuit in the seat heater circuit, often due to moisture intrusion or insulation failure.

B064C Repair Costs

Cost Breakdown by Repair Type

Seat Heater Element Replacement

Replacing the faulty seat heater element usually resolves the B064C code.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connections can fix the issue if the wiring is at fault.

  • Total: $50 - $100
  • Success rate: 70%
Switch Replacement

If the seat heater switch is defective, replacing it can resolve the code.

  • Total: $100 - $150
  • Success rate: 75%
Money-Saving Tips for B064C
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B064C Diagnosis Process

Follow these systematic steps to accurately diagnose B064C. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of the seat wiring and connectors for any visible damage (5-10 minutes)

Step 1: Conduct an initial visual inspection of the seat wiring and connectors for any visible damage (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use a diagnostic scanner, like the GeekOBD APP, to read the codes and check for any related trouble codes (10-15 minutes)

Step 2: Use a diagnostic scanner, like the GeekOBD APP, to read the codes and check for any related trouble codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Test the seat heater element with a multimeter to check for continuity and any breaks in the circuit (20-30 minutes)

Step 3: Test the seat heater element with a multimeter to check for continuity and any breaks in the circuit (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Inspect the seat heater switch for functionality; replace if necessary (15-20 minutes)

Step 4: Inspect the seat heater switch for functionality; replace if necessary (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Once repairs are made, clear the codes and conduct a road test to ensure the seat heater operates correctly (15-20 minutes)

Step 5: Once repairs are made, clear the codes and conduct a road test to ensure the seat heater operates correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: 2017 Chevrolet Silverado B064C Repair

Vehicle: 2017 Chevrolet Silverado, 45,000 miles

Problem: Customer reported that the left seat heater was not functioning.

Diagnosis: After scanning with GeekOBD, the B064C code was confirmed. A visual inspection revealed damaged wiring.

Solution: Replaced the damaged wiring harness and cleared the code, restoring seat heater functionality.

Cost: $150 (including parts and labor)

Result: Post-repair, the seat heater worked perfectly, and the customer was satisfied.

Case Study 2: 2018 GMC Sierra Seat Heater Issue

Vehicle: 2018 GMC Sierra, 30,000 miles

Problem: The left seat heater was intermittently working.

Diagnosis: The GeekOBD scan showed B064C, and testing revealed a faulty seat heater element.

Solution: Replaced the seat heater element and tested the system. The heater functioned correctly afterward.

Cost: $250 (including parts and labor)

Result: The repair resolved the issue, and the customer reported complete satisfaction with the outcome.

Diagnose B064C

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: B064C
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes