24-NA-027

Bulletin No.: 24-NA-027
Date: Feb-2024
Subject:
Brand:
Cadillac
DTC U3000 Setting in Automated Map Module (HDLM) - SuperCruise Unavailable
Model:
Model Year:
VIN:
from
to
2022
2024
2022
2022
Silverado 1500
2023
2024
Suburban
2022
Escalade
from
Escalade ESV
Chevrolet
Silverado 1500 LTD (RPO
J21, VIN Digit 5 = W / Y)
Silverado 1500 New
(RPO J22, VIN Digit 5 = A
/ D)
Tahoe
GMC
Hummer EV
2022
2023
Hummer EV Pickup
2024
2024
2022
2022
Sierra 1500
2023
2024
Yukon
2022
Hummer EV SUV
Sierra 1500 Limited (RPO
J21, VIN Digit 5 = 8 / 9)
Sierra 1500 New (RPO
J22, VIN Digit 5 = H / U)
Yukon XL
1
Engine:
to
Transmission:
Involved Region or Country
North America, Europe, Kazakhstan, Uzbekistan, Middle East, Israel, Palestine, Argentina (Mercosur), Brazil
(Mercosur), Bolivia (West), Chile (West), Colombia (West), Ecuador (West), Paraguay (West), Peru
(West), Uruguay (West), Japan, Cadillac Korea (South Korea), Thailand (ASEAN), Australia/New Zealand,
Other Africa
Additional Options (RPOs)
Equipped with RPO UKL
Condition
Some customers may comment that when trying to engage SuperCruise, the cluster will display the
message “SuperCruise unavailable – No road info”.
Technician will find DTC U3000 setting in the module.
Cause
The cause of the condition may be due to a reset condition in the module causing the message to display
and the U3000 DTC to set in the HDLM.
Correction
Technicians are asked to verify the condition by driving on 2 different verified SuperCruise roads. Replace
the HDLM module if, and only if, the part number of the HDLM in the vehicle is listed in Parts Information.
If one of these Map module part numbers above is not installed in the vehicle, and the map module is setting
the U3000 DTC with SuperCruise being unavailable, do not replace the module until additional diagnostics
through SI are completed.
Service Procedure
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs
under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must
follow those applicable laws.
Important: This technical service bulletin (TSB) can only be completed by certified repair facilities who have met all specific training, tool and equipment
requirements pertaining to the vehicle Brand and Model serviced. Repairs must be performed by a technician who has successfully completed the required
training.
Parts Information
No parts are required for this repair.
* We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does not
endorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be available from
other sources.
Causal Part
Description
Part Number
Qty
X
Hummer EV Only
86812593, 87823820
1
85595235, 85595239
85548122, 85548127
2
X
85624159, 85624160
Truck and SUV ONLY
1
87845922, 87845923
87833362, 87833364
87819889, 87819892
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH) for coverage information.
Labor Operation
Description
Labor Time
*6486108
Replace Automated Map Module for SuperCruise Errors
1.3 hr
*This is a unique Labor Operation for Bulletin use only.
Version
3
Modified
Released February 06, 2024
Revised February 14, 2024 – Changed Labor Time under Warranty Information.
Revised February 19, 2024 – Added graphic and changed last sentence in Correction Section.
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
3