GMC

18NA092

Manufacturer communications

Publication date: 2018-03-28
Received by NHTSA: 2018-05-21
NHTSA record numbers: 10137424

Manufacturer summary

Original wording in English

This technical bulletin provides a procedure to repair a bad terminal and re-route the harness to prevent the future event of Radio Audio Randomly Cuts Out DTC U18B4 - Lost Communication with Radio on Ethernet Bus from happening again.

NHTSA manufacturer communications ↗

Reported code forms

U18B4

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

GMCU18B4

Lost Communication with Radio on Ethernet Bus from happening again

NHTSA 10137424

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Make	Model	Model year
GMC	TERRAIN	2018

Data coverage →