C0045 on GMC

Left rear wheel speed sensor circuit fault (GM)

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

The sources describe the fault and lamps but not drivability; ABS and stability systems 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 C0045 means, the ranked causes and the test order, see the C0045 guide.

2008–2010 · Savana
Supported by vehicle data
Same GM bulletin covers the Savana. Bulletin currency not verified.
2010–2012 · Terrain
Supported by vehicle data
Same GM bulletin covers the Terrain. Bulletin currency not verified.

PIT-4648-B (gmc)Status unverified
ABS light or Service Stability message with C0045 and/or C0050
2008–2010savana · NHTSA 10036515
Wire pulling out of a crimp at connector X413 or X414 can cause the code.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PIT5171B (gmc)Status unverified
Intermittent Service Traction/Stability or ABS message with C0045 and C0050
2010–2012terrain · NHTSA 10112913
Inspect connector X411 and the harness for a wire break.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GM PIT-4648-B: ABS light and/or Service Stability message with C0045 and/or C0050 — General Motors via NHTSA
GM PIT5171B: intermittent Service Traction/Stability, ABS or AWD message with C0045 and C0050 symptom 06 — General Motors via NHTSA
GM 08-05-25-002: ABS code C0045 and/or C0050 (inspect connector X408 or left/right rear wheel speed sensor harness) — General Motors via NHTSA
NHTSA complaints ODI 11219167 (Cadillac SRX) and 11165895 (Chevrolet Equinox) — NHTSA ODI

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