Engine-Codes - GMC - P0979 GMC

P0979 GMC Code - Shift Solenoid Valve 3 Control Circuit Low Voltage

- Code Popularity: 2,715 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code P0979 GMC?

  • Faulty Shift Solenoid Valve 3
  • Shift Solenoid Valve 3 harness is open or shorted
  • Shift Solenoid Valve 3 circuit poor electrical connection
  • Faulty Transmission Control Module (TCM)

|How to Fix the P0979 GMC Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code P0979 GMC?

Labor: 1.0

The cost to diagnose the P0979 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code P0979 GMC Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of power
  • Transmission shifting problems

|What Does the P0979 GMC Code Mean?

The Transmission Control Module (TCM) high side driver 1 supplies 12 V to pressure control solenoid valve 3. The TCM also provides a control circuit and uses a low-side driver to control shift solenoid valve 3. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module detects an open or a short to ground on the shift solenoid valve 3 control circuit for greater than 1 s.

P0979 GMC Code - Shift Solenoid Valve 3 Control Circuit Low Voltage

|Need more Information on the P0979 GMC Code?

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|Need Help with the P0979 GMC Code?

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