C0710 on 2007-2011 GMC Yukon Denali: StabiliTrak Light Causes and Fixes

What's Unique About the 2007-2011 Gmc YUKON DENALI

The GMT900 platform, which includes the 2007-2011 Yukon Denali, is well-known for this specific issue. The primary cause is often not a failed sensor, but a poor connection at the sensor's electrical plug. Movement and vibration can cause the connector to become loose or for fretting corrosion to develop on the terminals, leading to signal loss. General Motors issued technical service bulletins, like PI0639C, specifically to address this connector problem, making it a recognized design quirk of this vehicle generation.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• "Service StabiliTrak" message on the Driver Information Center (DIC).
• "Service Traction Control" message on the DIC.
• StabiliTrak/Traction Control indicator light illuminated on the dash.
🎬 See common causes and fixes for the Service StabiliTrak light.
• ABS light may be illuminated.
• Unwanted stability control activation (e.g., braking or engine power reduction during normal turns).
• "Steering Assist Reduced" message may appear.
• A clicking or ticking sound from the steering column when turning, which could indicate the sensor housing itself has slipped out of position.

Most Likely Causes

1. Loose or Corroded Steering Angle Sensor Connector 🔴 High Probability → Shop Steering Angle Sensor The connector design allows for excessive movement, leading to fretting corrosion on the terminals, which increases resistance and disrupts the signal. This is a widely documented issue covered by multiple GM TSBs, most notably PI0639C.
   How to confirm: Physically inspect the steering angle sensor connector at the base of the steering column. Check for any up-and-down play. Disconnect it and look for small dark smudges (fretting corrosion) on the electrical terminals.
   Typical fix: Perform the TSB fix: disconnect the connector, apply dielectric lubricant (GM P/N 12377900 or 19260159) to the terminals, and add a shim to the male connector to eliminate play before reconnecting. Some owners have successfully used a small piece of a zip tie or felt tape as a shim.
   Est. part cost: $10-$25 for official GM dielectric grease and shim stock.
2. Faulty Steering Angle Sensor (SAS) 🟡 Medium Probability → Shop Steering Angle Sensor While less common than the connector issue, the sensor itself can fail internally. This often happens after the connector fix has been attempted without success, as documented by users in forum threads.
   How to confirm: Use a scan tool to monitor the steering angle sensor's live data while turning the steering wheel. The reading should be smooth and change consistently from approximately -500 to +500 degrees. If the data is erratic, jumps, freezes, or is stuck at 0, the sensor is likely bad.
   Typical fix: Replace the steering angle sensor. This requires partial disassembly of the steering column. 🎬 Watch: Expert tips and tricks for replacing the steering sensor. After replacement, a steering angle sensor calibration/relearn procedure MUST be performed with a capable scan tool for the system to function correctly.
   Est. part cost: $40-$150
3. Improper Steering Alignment ⚪ Low Probability If recent work was done on the steering or suspension (like replacing a rack and pinion), the steering wheel may not be centered when the wheels are straight. The EBCM sees a discrepancy between the vehicle's direction and the reported steering angle, triggering the code. One owner on a forum reported this exact issue after a rack replacement, where the steering was off by a full turn.
   How to confirm: Observe if the steering wheel is off-center when driving straight. A professional alignment check can confirm if the steering wheel center is out of sync with the wheel angles. A scan tool can also show a non-zero steering angle when driving straight.
   Typical fix: Perform a four-wheel alignment and ensure the technician correctly centers the steering wheel before setting the toe. A steering angle sensor relearn may be required afterward.
   Est. part cost: $100-$200 for a professional alignment.

Rare But Worth Checking

• Faulty Electronic Brake Control Module (EBCM): This is rare. Before replacing the EBCM, all other possibilities, especially wiring and the sensor itself, should be thoroughly exhausted. A user on a forum replaced the EBCM, but the codes returned, indicating the problem was elsewhere.
• Vehicle Modifications: As mentioned in TSB #PIT4322G, modifications like suspension lifts or significantly oversized tires can alter the steering geometry and cause the StabiliTrak system to receive unexpected data, potentially triggering a C0710 code.
• Dislodged Sensor Housing: A user on TahoeYukonForum.com reported solving their C0710 issue after discovering the entire sensor housing had slid down the steering shaft. Sliding it back up into its correct, clicked-in position resolved the problem without any parts replacement.

Diagnosis Steps

1. Check for any vehicle modifications (lift kits, large wheels) that could affect steering geometry, as noted in TSB #PIT4322G.
2. Scan the EBCM for all DTCs. Note if C0710 is present with C0455 or any U-codes like U2143.
3. Access live data with a scan tool. Observe the 'Steering Wheel Angle' parameter. Turn the wheel lock-to-lock. The value should change smoothly and consistently. A frozen or jumping value points to a sensor or connection issue.
4. If the data is erratic or frozen, locate the steering angle sensor at the base of the steering column.
5. Visually inspect the sensor housing. Ensure it has not slid down the steering shaft. It should be securely seated.
6. Inspect the sensor's electrical connector for looseness or play.
7. Disconnect the connector and inspect the male and female terminals for dark smudges indicating fretting corrosion.
8. If corrosion or looseness is found, perform the TSB PI0639C fix: apply a small adhesive shim (GM P/N 19178625) to the connector body to tighten the fit, and apply dielectric grease (GM P/N 12377900) before reconnecting.
9. Clear the codes and test drive the vehicle. If the code returns, the sensor itself is the next likely culprit.
10. If replacing the sensor, disconnect the battery and follow proper procedures for lowering the steering column.
11. After installing a new sensor, perform the Steering Angle Sensor Calibration/Relearn procedure using a compatible scan tool. This step is not optional.
🎬 Watch: How to perform the mandatory steering angle sensor calibration.

Parts You'll Likely Need

• Steering Angle Sensor (OEM #19418403 (supersedes 20910871)) — This sensor fails if the connector fix does not resolve the issue. It is the component that reads the steering wheel's position and rotation.
  Trusted brands: ACDelco (OEM), Dorman (e.g., 601-229), Standard Motor Products
  OEM price range: $80-$130
  Aftermarket price range: $40-$90
• Dielectric Grease and Adhesive Shim Stock (OEM #Grease: GM P/N 12377900 (US) or 10953529 (Canada); Shim: GM P/N 19178625) — These materials are required for the TSB-recommended fix to secure the loose connector and prevent terminal corrosion, which is the most common cause of the code.
  Trusted brands: ACDelco / GM Genuine Parts, Permatex, Kent Automotive
  OEM price range: $15-$30
  Aftermarket price range: $5-$15

Related Codes That Often Appear With This One

• C0455 — C0455 is for 'Steering Assist Control Solenoid - Malfunction'. Both codes relate to the steering system and are often triggered together by the same root cause, such as a faulty signal from the steering angle sensor, and are mentioned together in TSB PI0639C.
• U2143 — This code means 'Lost Communication With Steering Angle Sensor Module'. It indicates a complete loss of signal, often pointing directly to the connector or wiring issue that also causes C0710.

Technical Service Bulletins (TSBs) & Recalls

• PI0639C: The primary TSB for this issue. It describes the cause as fretting corrosion from a loose connector and provides the procedure for adding a shim and dielectric grease. It explicitly states not to replace the sensor unless this fix fails. It applies to a wide range of GM trucks and SUVs from 2007-2016.
• PIT4322G: Mentions unwanted stability activation and/or C0710 and advises checking for vehicle modifications before beginning diagnostics.

Platform-Specific Known Issues

• A loose electrical connector on the steering angle sensor is a well-documented weak point on 2007-2011 GMC Yukon Denalis and other GMT900 platform vehicles, with GM issuing multiple service bulletins (e.g., PI0639C, PIT4322G) to address it.

Mechanic-Grade Diagnostic Values

• Steering Angle Sensor Live Data (Angle) — expected: Smoothly changes from approx. -500 to +500 degrees turning lock-to-lock. Should read near 0 degrees with steering wheel centered.. Failure: Value is frozen, jumps erratically, or does not change when the wheel is turned.
• Steering Position Sensor Signals 1 and 2 (Voltage at PSCM) — expected: Both signals should read approx. 2.5V with the wheel centered. When turning, they should vary between approx. 0.1V and 5.0V.. Failure: When viewing live data in the EBCM, a failure often appears as one signal frozen at 2.5V and the other frozen at 0V, even while turning the wheel.

Hidden / Shadow Codes Worth Checking

• C0710-5A: Steering Wheel Angle Signal - Not Plausible. This indicates the signal received by the EBCM is irrational or doesn't correlate with other vehicle speed and yaw sensor data. (see via A professional-level scan tool (like GM Tech II/GDS2, Autel, Snap-on) capable of reading manufacturer-specific symptom bytes from the EBCM.)
• C0710-42: Steering Wheel Angle Signal - Calibration Not Programmed. This indicates that the mandatory steering angle sensor calibration has not been performed or was unsuccessful. (see via A professional-level scan tool capable of reading manufacturer-specific symptom bytes from the EBCM.)
• C0710-4B: Steering Angle Sensor - Calibration Data Not Learned. Similar to C0710-42, this points to a failure in the relearn process after a part replacement or alignment. (see via A professional-level scan tool capable of reading manufacturer-specific symptom bytes from the EBCM.)

Scan Tool Commands That Help

• GM Tech II / GDS2 or equivalent pro-level scanner: Steering Angle Sensor Calibration — This function is mandatory after replacing the steering angle sensor, replacing the EBCM, or performing a wheel alignment. It zeros the sensor's position relative to the straight-ahead position of the wheels. Failure to perform this will cause C0710 to set immediately.

Wiring & Ground Locations

• EBCM Ground — On the frame rail directly under the driver's side door area, often near the front body mount. It is a common point for multiple grounds to attach to a single stud.. The Electronic Brake Control Module (EBCM) processes the signal from the steering angle sensor. This ground is the main ground for the EBCM. If it becomes corroded or loose, which is common on these trucks, the EBCM can malfunction, lose communication, and set various codes, including C0710. Cleaning this ground point to bare metal is a critical and often overlooked diagnostic step.

Real Owner Repair Stories

• Tahoe Yukon Forum user (GMC Yukon/Tahoe (GMT900 platform)) — Service StabiliTrak and Traction Control lights with code C0710.
  ❌ Tried (didn't work) Multiple trips to the dealership could not diagnose the cause.
  ✅ What actually fixed it The vehicle had a rack and pinion replaced previously. A second technician discovered the steering was off by one full turn. The fix was to disconnect the steering shaft, center the steering gear to its '0' position, reconnect the shaft, and perform a proper wheel alignment. The code did not return.

OEM Part Supersession History

• 20910871 → 19418403 — Standard part revision and update by the manufacturer.
  Heads up: The new part number (19418403) is the correct and current replacement for the original. No known incompatibility issues exist when using the superseded part.

Model Year Variations Within This Range

• 2007-2011: The 2007-2011 GMC Yukon Denali uses a conventional hydraulic power steering system with a belt-driven pump, which also provides pressure for the hydroboost brake system. This is distinct from later vehicles that use Electric Power Steering (EPS). The C0710 fault on this platform is related to the electronic sensor within this hydraulic system, not an electric steering motor failure.