Service Bulletin

Bulletin No.:

19-NA-071

Date:

June, 2020

TECHNICAL
Subject:

Forward Collision/Active Safety System Inoperative, No Messages or Alerts, DTC’s
B390A 45, B390A 58 and/or DTC B390A 67 are set.

Brand:

Model:

Cadillac

Escalade Models

Model Year:
from

to

2016

2020

VIN:
from

Engine:

Transmission:

All

All

to

Involved Region or Country

North America, Europe, Russia, Middle East, Japan, Cadillac Korea (South Korea)

Condition

Customer may comment on finding the forward collision/active safety system inoperative,
while receiving no other messages or alerts.
Technicians may find DTC’s B390A 45, B390A 58 and/or DTC B390A 67 set.

Cause

The cause of the condition may be a combination of the following:
• The B233 Radar Sensor Module — Short Range performs internal fault detection on
itself, and the module continually runs the program to detect faults.
• If the B233 Radar Sensor Module — Short Range has detected an internal
malfunction, it will not function and the Active Safety System will be inoperative.

Correction

• If DTC B390A 58 is set, check for anything that can interfere with the radar signal.
Verify that the area in front of the radar is clean of mud, ice, snow, etc. Also verify the
fascia panels in front of the radar are damage-free, and not obstructed by any add-on
accessories such as emblems, stickers, etc.
• If the vehicle fascia is clean, unobstructed, and damage free, and B390A 58 is still
set as current, the radar sensor has detected a blockage condition and will not been
able to clear it until certain conditions are met.
It will be necessary to drive the vehicle at a speed greater than 9 km/h (6 mph) and
allow the radar sensor to be exposed to other vehicles/traffic in the direction of the
radar sensor field of view. Usually, a short drive in normal traffic conditions will allow
the radar sensor to clear the blockage condition.
• The B233 Radar Sensor Module — Short Range cannot be swapped from side to side
once they have been installed on a vehicle. DTC B390A 67 may set if a B233 Radar
Sensor Module — Short Range is reinstalled on the incorrect side of the vehicle.
• If DTC B390A 45 is set, it is most often due to the radar not learning the vehicle
position correctly, rather than an indication of an actual Software programming issue.
To correct, run or re-run the set-up function within the appropriate programming tool.
Make sure to perform both the programming and set-ups steps in SPS.
If further information is needed, refer to DTC B390A - Circuit/System Verification, in SI.

Copyright 2020 General Motors LLC. All Rights Reserved.

Page 2

June, 2020

Bulletin No.: 19-NA-071

Labor Operation

Description

Labor Time

2810655

Radar Sensor Module - Short Range Reprogramming with SPS

Use Published Labor
Operation Time

Warranty Information
For vehicles repaired under warranty, use:

Version

3

Modified

Released April 08, 2019.
Revised May 29, 2020— Added the 2016, 2017, and 2020 Model Years, Also removed
Yukon, Tahoe and Suburban Models.
Revised June 11, 2020 — Added Export Regions

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.

WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION