B3387 GMC Code - Right Front Window Up Switch Circuit Low
Quick Answer
The B3387 GMC code indicates a problem with the right front window up switch circuit being low. Common causes include Faulty right front window switch, Damaged wiring in the right front window circuit, Malfunctioning right front window motor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B3387 GMC indicates Right Front Window Up Switch Circuit Low.
- Common causes
- Common causes include Faulty right front window switch, Damaged wiring in the right front window circuit, Malfunctioning right front window motor.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code B3387 GMC Description
The B3387 GMC code indicates a problem with the right front window up switch circuit being low. This means that there is a malfunction in the electrical circuit that controls the right front window going up. The switch circuit is responsible for sending signals to the window motor to raise the window. When this circuit is low, it can prevent the window from functioning properly, leading to issues with opening and closing the window.
Common Causes of B3387 GMC
- Faulty right front window switch.
- Damaged wiring in the right front window circuit.
- Malfunctioning right front window motor.
- Issues with the control module that controls the right front window.
- Corrosion or loose connections in the electrical system related to the right front window.
Symptoms of B3387 GMC
- Inability to raise the right front window using the switch.
- Unresponsive or intermittent operation of the right front window.
- Strange noises coming from the right front window when attempting to raise it.
- The right front window gets stuck halfway when trying to raise it.
- Illumination of the check engine light on the dashboard.
How to Fix B3387 GMC
- Begin by diagnosing the issue using a diagnostic scanner to retrieve the specific fault codes and pinpoint the problem area.
- Inspect the right front window switch for any signs of damage or malfunction. Replace the switch if necessary.
- Check the wiring in the right front window circuit for any breaks, frays, or damage. Repair or replace any damaged wiring.
- Test the right front window motor to ensure it is functioning correctly. Replace the motor if it is faulty.
- Verify the control module's functionality by testing its connections and signals. Replace the control module if it is the source of the issue.
Cost to Fix B3387 GMC
The typical repair costs for addressing the B3387 GMC code can vary depending on the specific cause of the issue and the parts and labor required. On average, the cost of parts for this repair can range from $50 to $200, while the labor costs can range from $100 to $300. Overall, the total repair cost can be estimated to be between $150 and $500. It is important to note that these costs are approximate and can vary based on the location, vehicle make and model, and the rates of the auto repair shop. It is advisable to consult with a professional mechanic to get an accurate estimate for the repair.
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Frequently Asked Questions about B3387 GMC Code
1. What does the OBDII code B3387 mean on a GMC vehicle?
The B3387 code indicates a "Right Front Window Up Switch Circuit Low," meaning there’s a problem in the electrical circuit for the right front window's "up" switch.
2. What are the symptoms of the B3387 code on a GMC?
Symptoms may include the right front window not rolling up, intermittent operation of the window, or the window switch not responding.
3. What causes the B3387 code to appear?
Common causes include a faulty window switch, damaged wiring or connectors in the circuit, or a malfunctioning window motor.
4. How do I diagnose the B3387 code on my GMC?
Start by inspecting the window switch, checking for damaged wires or loose connections, and testing the circuit with a multimeter to verify voltage and continuity.
5. Can a faulty window motor trigger the B3387 code?
Yes, if the window motor is drawing too much current or failing to respond, it can cause the circuit to register a low voltage, triggering this code.
6. Is it safe to drive with the B3387 code on a GMC?
Yes, it’s generally safe to drive, but the right front window may not function properly, potentially causing inconvenience or safety concerns.
7. How can I fix the B3387 code on my GMC?
Repairs may involve replacing the window switch, repairing damaged wiring, cleaning corroded connectors, or replacing the window motor if necessary.
8. What tools are needed to fix the B3387 code?
You’ll typically need a multimeter, wiring diagrams, and potentially basic tools like a screwdriver and pliers to remove panels and access the switch or motor.
9. Can a blown fuse cause the B3387 code?
While a blown fuse can affect the window circuit, it typically wouldn’t cause this specific code, which points to a low voltage issue in the switch circuit.
10. Do I need to clear the code after repairs?
Yes, after completing repairs, use an OBDII scanner to clear the code and verify that it doesn’t return during operation.
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