AutoCodes – GMC – P0880 GMC

P0880 GMC Code - Transmission Control Module Supply Voltage Circuit

Quick Answer

The Transmission Control Module (TCM) requires continuous battery voltage to operate. Common causes include Transmission Control Module (TCM) Power and/or Ground connection, Faulty Transmission Control Module, Transmission Control Module harness is open or shorted. 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: P0880 GMC indicates Transmission Control Module Supply Voltage Circuit.
Common causes: Common causes include Transmission Control Module (TCM) Power and/or Ground connection, Faulty Transmission Control Module, Transmission Control Module harness is open or shorted.
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 505

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 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0880 GMC Description

The Transmission Control Module (TCM) requires continuous battery voltage to operate. The TCM uses ignition voltage and or ignition accessory switch voltage for TCM wake-up and operation. When ignition voltage and ignition accessory switch voltage are switched off, the TCM starts to power down. The TCM determines if the battery voltage is lost prior to completion of the power down. The Diagnostic Trouble Code (DTC) will be set when the TCM detects battery power to the TCM is lost before the TCM power down process is complete.

OBDII Code P0880 GMC - Transmission Control Module Supply Voltage Circuit - AutoCodes.com — P0880 GMC Code - Transmission Control Module Supply Voltage Circuit

What does this mean?

What are the Possible Causes of the DTC P0880 GMC?

Transmission Control Module (TCM) Power and/or Ground connection
Faulty Transmission Control Module
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P0880 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 P0880 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 P0880 GMC code?

Need more information on how to fix the P0880 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P0880 2014 GMC Sierra — Transmission Control Module Supply Voltage Circuit
P0880 2015 GMC Sierra — Transmission Control Module Supply Voltage Circuit
P0880 2016 GMC Sierra — Transmission Control Module Supply Voltage Circuit
P0880 2017 GMC Sierra — Transmission Control Module Supply Voltage Circuit
P0880 2018 GMC Sierra — Transmission Control Module Supply Voltage 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 P0880 GMC Code

1. What does the P0880 code mean on a GMC vehicle?

The P0880 code indicates an issue with the Transmission Control Module (TCM) supply voltage circuit, which affects the TCM's ability to properly control the transmission.

2. What are the common symptoms of the P0880 code?

Symptoms may include the transmission being stuck in limp mode, hard shifting, no shifting, a check engine light, or reduced fuel efficiency.

3. What causes the P0880 code to appear on a GMC?

Common causes include a faulty Transmission Control Module (TCM), damaged or corroded wiring, a blown fuse, or a failing TCM power relay.

4. How do I diagnose the P0880 code on my GMC?

Start by checking the TCM fuse, inspecting wiring for damage or corrosion, testing the TCM power relay, and verifying the TCM is receiving the correct voltage.

5. Can I drive my GMC with the P0880 code?

Driving with the P0880 code is not recommended as it can cause further damage to the transmission and lead to unsafe driving conditions.

6. How do I fix the P0880 code on a GMC vehicle?

Repairs may include replacing a blown fuse, repairing or replacing damaged wiring, replacing the TCM power relay, or replacing the Transmission Control Module itself.

7. What tools are needed to troubleshoot the P0880 code?

Basic tools include a multimeter for testing voltage, an OBDII scanner for reading and clearing codes, and wiring diagrams for the TCM circuit.

8. How much does it typically cost to fix the P0880 code on a GMC?

Costs can vary depending on the issue, ranging from $10â€“$50 for a fuse or relay to $500â€“$1,000+ if the TCM needs to be replaced.

9. Can a dead battery cause the P0880 code?

Yes, a weak or dead battery can lead to low voltage supply to the TCM, triggering the P0880 code.

10. Does the P0880 code require reprogramming the TCM after repairs?

If the TCM is replaced, it may need to be reprogrammed to match the vehicle's specifications. Consult a dealership or qualified technician for this service.