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Engine-Codes – GMC – P2736 GMC

P2736 GMC Code - Transmission Control Solenoid Valve 6 Control Circuit Open

Quick Answer

The P2736 diagnostic trouble code (DTC) for GMC vehicles indicates that there is an open circuit detected in the control circuit for Transmission Control Solenoid Valve 6. Common causes include Faulty Transmission Control Solenoid Valve 6: The solenoid itself may be malfunctioning, causing the open circuit, Wiring Issues: Damage or corrosion to the wiring harness connected to the solenoid can lead to an open circuit, Poor Electrical Connection: A loose or poor electrical connection at the solenoid can also trigger this code. 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
P2736 GMC indicates Transmission Control Solenoid Valve 6 Control Circuit Open.
Common causes
Common causes include Faulty Transmission Control Solenoid Valve 6: The solenoid itself may be malfunctioning, causing the open circuit, Wiring Issues: Damage or corrosion to the wiring harness connected to the solenoid can lead to an open circuit, Poor Electrical Connection: A loose or poor electrical connection at the solenoid can also trigger this code.
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 Sep 09, 2024
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Code P2736 GMC Description

The P2736 diagnostic trouble code (DTC) for GMC vehicles indicates that there is an open circuit detected in the control circuit for Transmission Control Solenoid Valve 6. This solenoid is responsible for controlling the flow of transmission fluid in the transmission system, specifically in relation to gear shifting and overall transmission operation. An open circuit in this control circuit can lead to improper transmission performance, erratic shifting, or even a complete inability to shift gears.

OBDII Code P2736 GMC - Transmission Control Solenoid Valve 6 Control Circuit Open
P2736 GMC Code - Transmission Control Solenoid Valve 6 Control Circuit Open

Common Causes of P2736 GMC

  1. Faulty Transmission Control Solenoid Valve 6: The solenoid itself may be malfunctioning, causing the open circuit.
  2. Wiring Issues: Damage or corrosion to the wiring harness connected to the solenoid can lead to an open circuit.
  3. Poor Electrical Connection: A loose or poor electrical connection at the solenoid can also trigger this code.
  4. Faulty TCM: A malfunctioning Transmission Control Module may not be able to properly communicate with the solenoid.
  5. Internal Transmission Issues: In some cases, internal transmission problems may be causing the open circuit, such as a damaged internal wiring harness.

Symptoms of P2736 GMC

  1. Harsh or Delayed Shifting: The transmission may shift abruptly or take longer than usual to shift gears.
  2. Transmission Slipping: The transmission may slip out of gear or struggle to maintain gear engagement.
  3. Stuck in Gear: The vehicle may get stuck in a specific gear and not shift properly.
  4. Check Engine Light: The check engine light may illuminate on the dashboard, signaling a transmission issue.
  5. Reduced Fuel Efficiency: Improper transmission operation can lead to decreased fuel efficiency due to inefficient gear shifting.

How to Fix P2736 GMC

  1. Diagnose the Issue: Use a scan tool to read the DTC and pinpoint the specific cause of the open circuit.
  2. Inspect Wiring and Connections: Check the wiring harness and connections to the Transmission Control Solenoid Valve 6 for any damage or corrosion.
  3. Test Solenoid Valve: Test the solenoid valve for proper operation. If it is faulty, replace it.
  4. Check TCM Function: Ensure that the Transmission Control Module is functioning correctly and communicating with the solenoid.
  5. Clear DTC and Test Drive: Clear the DTC from the system and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P2736 GMC

The cost of repairing a P2736 code for a Transmission Control Solenoid Valve 6 Control Circuit Open can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of replacing a faulty solenoid valve can range from $150 to $300, while addressing wiring issues or electrical connections may cost between $100 to $200. The total repair cost, including parts and labor, could be anywhere from $250 to $500. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on location, vehicle make and model, and other factors. It's recommended to consult with a professional mechanic for a more accurate cost estimate tailored to your specific situation.

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Information for Specific GMC Models

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.

Frequently Asked Questions about P2736 GMC Code

What does the OBDII code P2736 mean for a GMC vehicle?

The P2736 code indicates an issue with Transmission Control Solenoid Valve 6, specifically an open circuit in its control system.

What are the common symptoms of code P2736 in a GMC?

Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel efficiency, the vehicle being stuck in one gear, and the Check Engine Light illuminating.

What causes the P2736 code to appear in a GMC?

Common causes include a faulty transmission solenoid, damaged or corroded wiring, a poor electrical connection, or a malfunctioning transmission control module (TCM).

Can I drive my GMC with the P2736 code active?

While it may be possible to drive, doing so is not recommended as it can lead to further transmission damage or unsafe driving conditions.

How do you diagnose the P2736 code on a GMC vehicle?

Diagnosis involves checking the transmission fluid level, inspecting the wiring and connectors, testing the solenoid for continuity, and using a scan tool to monitor TCM signals.

What tools are needed to repair the P2736 code on a GMC?

Common tools include a diagnostic scanner, a multimeter, basic hand tools, and possibly a transmission fluid service kit.

How much does it cost to fix the P2736 code on a GMC?

Repair costs vary but can range from $150 to $400 for solenoid replacement, while significant transmission repairs may cost more.

Can low transmission fluid cause the P2736 code in a GMC?

Yes, low or contaminated transmission fluid can affect solenoid operation and contribute to this error code.

What should I do if the P2736 code keeps coming back after a repair?

Recheck the wiring, connections, and solenoid. If the issue persists, the TCM may need further inspection or replacement.

Does the P2736 code always mean the solenoid is faulty?

No, the issue could be with the wiring, connectors, or TCM rather than the solenoid itself. Comprehensive diagnostics should be performed.

Discuss the causes and fixes for P2736 GMC OBDII Code

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