AutoCodes – GMC – P0826 2017 GMC Sierra

P0826 2017 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 2017 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 277

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 2017 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 2017 GMC Sierra - Up And Down Shift Switch Circuit - AutoCodes.com — P0826 2017 GMC Sierra Code - Up And Down Shift Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P0826 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What does the OBDII code P0826 mean on a 2017 GMC Sierra?

P0826 indicates a malfunction in the up and down shift switch circuit, which is part of the manual shift control system in vehicles with an automatic transmission.

2. What are the common symptoms of P0826 in a 2017 GMC Sierra?

Symptoms may include illuminated check engine light, inability to manually shift gears, erratic shifting, or the transmission being stuck in one gear.

3. What causes the P0826 code to appear on a 2017 GMC Sierra?

Common causes include a faulty shift switch, damaged wiring or connectors in the shift switch circuit, or a malfunctioning transmission control module (TCM).

4. Can I drive my 2017 GMC Sierra with the P0826 code?

While the vehicle may still be drivable, it could experience shifting issues or reduced performance. Prompt diagnosis and repair are recommended to avoid further damage.

5. How is the P0826 code diagnosed?

Technicians typically use a scan tool to confirm the code, inspect the shift switch and wiring for damage, and test the circuit for continuity and proper voltage.

6. How can the P0826 code be fixed on a 2017 GMC Sierra?

Repairs may involve replacing a faulty shift switch, repairing damaged wiring or connectors, or reprogramming or replacing the transmission control module if necessary.

7. What is the up and down shift switch in a 2017 GMC Sierra?

The up and down shift switch allows the driver to manually control gear shifting in automatic transmissions, often via buttons or a lever on the steering column or shifter.

8. How much does it cost to fix a P0826 code in a 2017 GMC Sierra?

Repair costs can vary but typically range from $150 to $500, depending on whether the issue is with the shift switch, wiring, or TCM.

9. Can a dead battery cause the P0826 code on a 2017 GMC Sierra?

A dead or weak battery can cause electrical issues, but it is not a common cause of the P0826 code. However, itâ€™s always good to ensure proper battery voltage before diagnosing further.

10. Will clearing the P0826 code fix the issue on a 2017 GMC Sierra?

Clearing the code may turn off the check engine light temporarily, but the underlying issue will need to be repaired to prevent the code from returning.