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P3260 GMC Code - Internal Control Module Drive Motor Control Performance

Quick Answer

The diagnostic code P3260 indicates a performance issue with the internal control module responsible for managing the drive motor in hybrid and electric vehicles. Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module circuit has a poor electrical connection. 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
P3260 GMC indicates Internal Control Module Drive Motor Control Performance.
Common causes
Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module circuit has a poor electrical connection.
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.
What is this?
Table of contents Created and updated by William Orellana on Nov 05, 2025
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Code P3260 GMC Description

The diagnostic code P3260 indicates a performance issue with the internal control module responsible for managing the drive motor in hybrid and electric vehicles. Specifically, this code is triggered when the hybrid/EV powertrain control module 1 detects that the engine speed and drive motor torque fall below predetermined calibrated limits while the transmission is in the Neutral position. This module is integral to the vehicle's power inverter system, which converts DC power from the battery into AC power to drive the electric motor. When the control module identifies a failure to maintain the necessary performance parameters, it can lead to a variety of operational issues.
OBDII Code P3260 GMC - Internal Control Module Drive Motor Control Performance
P3260 GMC Code - Internal Control Module Drive Motor Control Performance

Common Causes of P3260 GMC

  1. Faulty Power Inverter Module
  2. Power Inverter Module harness is open or shorted
  3. Power Inverter Module circuit has a poor electrical connection
  4. Software issues or outdated firmware in the control module
  5. Faulty sensors providing incorrect data to the control module

Symptoms of P3260 GMC

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced acceleration or sluggish performance
  3. Unusual noises from the power inverter module
  4. Increased energy consumption or decreased range
  5. Vehicle may enter limp mode, limiting speed and performance

How to Fix P3260 GMC

  1. Perform a thorough diagnostic scan to confirm the P3260 code and check for any additional codes.
  2. Inspect the Power Inverter Module and its harness for signs of damage, wear, or corrosion.
  3. Test the electrical connections and wiring for continuity and shorts.
  4. Update the control module software if necessary, or reprogram the module to ensure proper functionality.
  5. If the Power Inverter Module is determined to be faulty, replace it with a new or refurbished unit.

Cost to Fix P3260 GMC

The cost to diagnose and repair issues related to the P3260 code typically ranges from $200 to $1,500, depending on the specific cause of the problem and the parts required. Labor costs can vary widely, with most shops charging between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops may offer lower prices. The total cost will also depend on the make and model of the vehicle, as well as the complexity of the repair needed.

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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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