AutoCodes – GMC – P0826 2015 GMC Sierra

P0826 2015 GMC Sierra Code - Up And Down Shift Switch Circuit

Quick Answer

The Driver Shift Request (DSR) allows the driver to select the desired range of gears for current driving conditions. Common causes include Faulty Transmission Shift Lever, Transmission Shift Lever harness is open or shorted, Transmission Shift Lever circuit 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: P0826 2015 GMC Sierra indicates Up And Down Shift Switch Circuit.
Common causes: Common causes include Faulty Transmission Shift Lever, Transmission Shift Lever harness is open or shorted, Transmission Shift Lever circuit 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.

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Code Popularity 209

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0826 2015 GMC Sierra Description

The Driver Shift Request (DSR) allows the driver to select the desired range of gears for current driving conditions. The DSR shift system is activated when the gear selector is in the manual position. The DSR system is deactivated in all other range positions. Pressing the plus (+) switch once will command the Body Control Module (BCM) to signal the Transmission Control Module (TCM) to upshift to the next high gear. Pressing the minus (−) switch once will command the BCM to signal the TCM to downshift to the next lowest or previous gear. The TCM will not allow a downshift if the transmission is compromised by over-speeding. The automatic transmission manual shift switch is comprised of three different resistor values in series and two switches. The BCM supplies a 12-volt circuit to the automatic transmission manual shift switch. The signal circuit varies the voltage back to the body control module depending on which switch is depressed. The Diagnostic Trouble Code (DTC) will be set when the BCM detects an invalid voltage on the TAP up/down signal circuit for 1 minute.

OBDII Code P0826 2015 GMC Sierra - Up And Down Shift Switch Circuit - AutoCodes.com — P0826 2015 GMC Sierra Code - Up And Down Shift Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P0826 2015 GMC Sierra?

Faulty Transmission Shift Lever
Transmission Shift Lever harness is open or shorted
Transmission Shift Lever circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC P0826 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0826 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0826 2015 GMC Sierra code?

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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.

Frequently Asked Questions about P0826 2015 GMC Sierra Code

1. What does the OBDII code P0826 mean on a 2015 GMC Sierra?

P0826 indicates an issue with the up and down shift switch circuit, which is part of the transmissionâ€™s manual shift control system.

2. What are the common symptoms of the P0826 code on a 2015 GMC Sierra?

Common symptoms include difficulty shifting gears manually, the transmission stuck in a single gear, or the illumination of the check engine light.

3. What causes the P0826 code to appear on a 2015 GMC Sierra?

The code can be triggered by a faulty shift switch, damaged wiring or connectors in the shift circuit, or issues with the transmission control module (TCM).

4. Can I drive my 2015 GMC Sierra with the P0826 code?

While the vehicle may still be drivable, it may experience limited shifting functionality, which could lead to unsafe driving conditions. It's best to address the issue promptly.

5. How do I diagnose the P0826 code on a 2015 GMC Sierra?

Diagnosis typically involves scanning for additional codes, visually inspecting the shift switch wiring and connectors, and testing the shift switch and circuit for proper operation.

6. How do I fix the P0826 code on a 2015 GMC Sierra?

Repairs may include replacing the up and down shift switch, repairing or replacing damaged wiring, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to repair the P0826 code on a 2015 GMC Sierra?

Repair costs can vary, but replacing the shift switch might cost $100â€“$300, while more extensive repairs involving the TCM could cost $500 or more.

8. Can a bad battery cause the P0826 code on a 2015 GMC Sierra?

A weak or failing battery can cause voltage issues that might affect the shift switch circuit, but this is less common than other causes like wiring or switch failure.

9. Does the P0826 code require reprogramming the TCM on a 2015 GMC Sierra?

Reprogramming the TCM is only necessary if the issue stems from a software glitch or TCM malfunction, but itâ€™s not a common fix for this code.

10. How can I prevent the P0826 code on my 2015 GMC Sierra?

Regularly inspect and maintain the transmission system, ensure wiring and connectors are in good condition, and address any shifting issues promptly to prevent circuit-related faults.