AutoCodes – GMC – P0826 GMC

P0826 GMC 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 GMC 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 6,110

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

What does this mean?

What are the Possible Causes of the DTC P0826 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P0826 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0826 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0826 2014 GMC Sierra — Up And Down Shift Switch Circuit
P0826 2015 GMC Sierra — Up And Down Shift Switch Circuit
P0826 2016 GMC Sierra — Up And Down Shift Switch Circuit
P0826 2017 GMC Sierra — Up And Down Shift Switch Circuit
P0826 2018 GMC Sierra — Up And Down Shift Switch Circuit

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 GMC Code

1. What are the common symptoms of OBDII code P0826 in a GMC vehicle?

Common symptoms include issues with shifting gears, hesitation during acceleration, and the inability to shift into certain gears.

2. What can cause the Up And Down Shift Switch Circuit error code P0826 in a GMC vehicle?

Possible causes include a faulty upshift/downshift switch, damaged wiring or connectors in the shift switch circuit, or a malfunctioning transmission control module.

3. How can I diagnose the OBDII code P0826 in my GMC vehicle?

Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the condition of the upshift/downshift switch, inspecting the wiring for any damage, and testing the transmission control module.

4. Can a DIY enthusiast repair the Up And Down Shift Switch Circuit issue (P0826) in a GMC vehicle?

While some may attempt to repair this issue themselves, it is recommended to consult a professional mechanic due to the complexity of diagnosing and repairing transmission-related problems.

5. Are there any temporary solutions for the Up And Down Shift Switch Circuit error code in a GMC vehicle?

Resetting the vehicle's computer by disconnecting the battery for a few minutes may temporarily clear the code, but it is not a permanent solution. The underlying issue should still be diagnosed and repaired.

6. Is it safe to continue driving with OBDII code P0826 triggered in a GMC vehicle?

Continuing to drive with this code may lead to further transmission problems and potential safety hazards. It is best to address the issue promptly to avoid costly repairs or breakdowns.

7. How much does it typically cost to repair the Up And Down Shift Switch Circuit problem (P0826) in a GMC vehicle?

The cost of repairs can vary depending on the exact cause of the issue, the model of the GMC vehicle, and labor costs. It is advisable to get a few quotes from reputable mechanics before proceeding with repairs.

8. Can weather conditions or driving habits trigger the Up And Down Shift Switch Circuit error code P0826 in a GMC vehicle?

Extreme weather conditions or aggressive driving habits can sometimes exacerbate existing issues with the transmission, potentially leading to the triggering of the P0826 trouble code.

9. Will resetting the OBDII code P0826 in a GMC vehicle make it go away permanently?

Simply resetting the code without addressing the underlying problem will not make it disappear permanently. The issue must be diagnosed and repaired to prevent the code from reoccurring.

10. How long does it typically take to repair the Up And Down Shift Switch Circuit problem (P0826) in a GMC vehicle?

The repair time can vary based on the specific cause of the issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues could take longer to resolve.