C0455 on GMC

Steering angle sensor fault (GM)

Severity: Severity not verified — if the car runs badly, have it inspected

The sources describe the fault and lamps but not drivability; stability control and steering input sensing are safety-critical, so have it checked.

It gets more serious if:

Stop: The red brake warning lamp comes on, the pedal feels soft or low, or steering assist is lost along with the ABS lamp.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on GMC. For what C0455 means, the ranked causes and the test order, see the C0455 guide.

What's different on GMC

GMC

2007–2016 · Sierra 1500
Supported by vehicle data
Same GM bulletin covers the Sierra. Bulletin currency not verified.

PI0639C (gmc)Status unverified
Service Stabilitrak message and DTC C0455 or C0710
2007–2016sierra-1500 · NHTSA 10112287
Apply dielectric grease and adhesive shim stock to the steering angle sensor connector.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Sources and review

GM PI0639C: Service Stabilitrak message and DTC C0455 or C0710, steering angle sensor connector — General Motors via NHTSA
NHTSA complaints ODI 10724228 (Silverado) and 11427758 (Suburban) — NHTSA ODI

Last reviewed: October 16, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error