Engine-CodesGMC – P1682 2015 GMC Sierra

P1682 2015 GMC Sierra Code - Ignition 1 Switch Circuit 2

Quick Answer

The P1682 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Ignition 1 Switch Circuit 2. Common causes include Faulty ignition switch, Wiring issues or shorts in the circuit, Loose or corroded connections. 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
P1682 2015 GMC Sierra indicates Ignition 1 Switch Circuit 2.
Common causes
Common causes include Faulty ignition switch, Wiring issues or shorts in the circuit, Loose or corroded connections.
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.
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1682 2015 GMC Sierra Description

The P1682 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Ignition 1 Switch Circuit 2. This code indicates a problem with the electrical circuit that controls the ignition switch, specifically the second circuit. The ignition switch is a crucial component that allows the driver to start the vehicle by turning the key. When this circuit malfunctions, it can lead to various issues that affect the vehicle's performance and overall functionality.

OBDII Code P1682 2015 GMC Sierra - Ignition 1 Switch Circuit 2
P1682 2015 GMC Sierra Code - Ignition 1 Switch Circuit 2

Common Causes of P1682 2015 GMC Sierra

  1. Faulty ignition switch
  2. Wiring issues or shorts in the circuit
  3. Loose or corroded connections
  4. Malfunctioning ignition switch relay
  5. Electrical system issues

Symptoms of P1682 2015 GMC Sierra

  1. Difficulty starting the vehicle
  2. Intermittent stalling while driving
  3. Loss of power to essential systems
  4. Inability to turn the key in the ignition
  5. Dashboard warning lights related to the ignition system

How to Fix P1682 2015 GMC Sierra

  1. Diagnose the issue using a scan tool to retrieve the DTC and inspect the ignition switch circuit.
  2. Check for loose or corroded connections and repair as necessary.
  3. Test the ignition switch and relay for proper functionality and replace if faulty.
  4. Inspect the wiring for any damage or shorts and repair or replace as needed.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1682 2015 GMC Sierra

The typical repair costs for addressing the P1682 code on a 2015 GMC Sierra can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's essential to consider that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence the overall repair costs. It is advisable to consult with a trusted mechanic or repair shop to get a more accurate estimate based on your specific circumstances.

Tech Notes for P1682 2015 GMC Sierra

There is a Factory Service Bulletin for the following Chevrolet models:

2016-2018 Chevrolet Silverado 1500

2019 Chevrolet Silverado LD

Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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