NHTSA ID Number: 11028740
Manufacturer Communication Number: CC-26-90-01
TSB/Document Date: 2026-02-11
Summary
BL1035 update, A software update for MY2025 Karma
Vehicles
CC-26-90-01
Type: Campaign
Year: 2026
System: Electrical (90)
Sequence: 01
Title: BL1035 update
Applicability: MY2025 Revero
Market Region: All
PRIORITY: See provided list
PURPOSE: A software update for MY2025 Karma Vehicles
Selected Model Year 2025 Revero vehicles require n update to a couple of modules. Do to the required
update these two modules need to be shipped to Karma Automotive headquarters in Irvine, California.
These will be returned promptly to the vehicle at the service center, on a first received first served basis,
as quickly as possible. Create a TSS case for the operation, request a shipping label from Karma. Label
the modules with tape to indicate the VIN and the current mileage of the vehicle.
Remove the modules as per normal operation and as noted int he workshop service manual.
Remember to perform a 12-volt disconnect prior to removing the modules.
12-volt disconnect
ECM location underhood
HCU location, passenger
foot-well under carpet
Hybrid Control Unit
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 1 of 5
Published: February 2026
CC-26-90-01
Type: Campaign
Year: 2026
System: Electrical (90)
Sequence: 01
Title: BL1035 update
Applicability: MY2025 Revero
Market Region: All
After installation of the updated modules, the new software IDs should be as follow for the affected
modules. Check the Touch Panel (TPI) to verify the ECU version and CIU version after reinstall.
Module
HCU
primary
ECM
OLD BL1030 ID
New BL1035 ID
055CC112
055C–C1–13
612-21-94
621–21–96
BL1035 Module Checklist. Through TPI only
Module
Expected Software
Vehicle Version (CIU)
25.34.82.2
VIN
Verify against VIN plate at windshield
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 2 of 5
Published: February 2026
CC-26-90-01
Affected VINs
50GEE4SLXSA000027
50GEE4SL3SA000029
50GRE4SL8SA000030
50GRE4SLXSA000031
50GRE4SL1SA000032
50GRE4SL7SA000035
50GRE4SL9SA000036
50GRE4SL0SA000040
50GEE4SL2SA000040
50GRE4SL6SA000043
50GEE4SL8SA000043
50GRE4SL8SA000044
50GRE4SLXSA000045
50GRE4SL3SA000047
50GRE4SL5SA000048
50GRE4SL3SA000050
50GRE4SL5SA000051
50GRE4SL7SA000052
50GRE4SL9SA000053
50GRE4SL0SA000054
50GRE4SL2SA000055
Page 3 of 5
50GRE4SL4SA000056
50GRE4SL8SA000058
50GRE4SL8SA000061
50GEE4SL7SA000065
50GRE4SL9SA000067
50GRE4SL2SA000069
50GRE4SL2SA000072
50GRE4SL1SA000077
50GRE4SL1SA000080
50GRE4SL3SA000081
50GRE4SL0SA000085
50GRE4SL4SA000090
50GRE4SL8SA000092
50GRE4SL3SA000095
50GRE4SL5SA000096
50GRE4SL9SA000098
50GRE4SL5SA000101
50GRE4SL8SA000111
50GRE4SL5SA000115
50GRE4SL7SA000116
50GRE4SL0SA000118
Published: January 2026
CC-26-90-01
After the update is complete, and modules are reconnected. Verify all the modules are updated correctly.
The table below shows the expected software per module. The electronic parking brake (EPB) is not updated at this time. Check through the touch panel (as above) in settings and check the “ECU versions.”
Module
AFRM
APM
ASM
AWCM
BECM
BSML
BSMR
DIS
DML
DMR
EBCM
ECM
EPB
EPB2
EPS
ESM
HCU
HCUc
HLML
HLMR
HVAC
OBCM
PDM
PIM_GEN
PIM_TM1
PIM_TM2
SCM
SVCS
SWCM
SWSL
SWSR
TPMS
VCMB
VCMS
Page 4 of 5
Expected Software
07220308
SW_3_1_4_0_6bc7565d
07620103
0712-02-00
05520305
0572-03-08
0572-03-08
0501-34-82
0681-00-14
0691-00-14
06260310
612-21-96
0537-01-06
0522-01-25
0732-01-17
055C-C1-13
0568-01-41
0652-01-09
0652-01-09
06320329
03210007
0702-03-01
05830246
05A30158
05B30158
0762-01-04
05420310
0742-05-00
0752-01-03
0757-01-03
0802-00-05
0661-00-26
0671-00-41
Published: January 2026
CC-26-90-01
Type: Campaign
Year: 2026
System: Electrical (90)
Sequence: 01
Title: BL1035 update
Applicability: MY2025 Revero
Market Region: All
PARTS REQUIRED:
PART NUMBER
N/A
DESCRIPTION
N/A
QUANTITY
N/A
Please contact the parts department ([email protected]) and order this part by email if
not available in on-line at time of repair.
SHOP SUPPLIES:
DESCRIPTION
N/A
SPECIAL TOOLS:
DESCRIPTION
N/A
CAUSAL PART: (use one of the parts for the complaint)
PART NUMBER
C131110103903
DESCRIPTION
Basic Control Unit - DME ECM
LABOR CODES: (use one appropriate for the part(s) replaced)
CODE
DESCRIPTION
TIME
90-20-40-05
MY2025 BL1035 Update
0.7
DEFECT CODE
99-20-20-68
SUBLET:
CODE
N/A
DESCRIPTION
AMOUNT
WARRANTY DISPOSITION: This repair is covered under the New Vehicle Limited Warranty, in effect
for four (4) years from the in-service date or 50,000 miles for Model Year 2025 Revero
Karma Automotive Bulletins and service documents are intended for use by experienced and trained Technicians. If you lack the skills, tools, equipment
and a suitable workshop for any procedure described in this document, we suggest you leave such repairs to a Karma retailer and service provider. See
your service provider for advice on whether your vehicle may benefit from the information contained within this document. The information contained in the
Karma Bulletin is accurate at the date of publication. However, Karma Automotive regularly updates technical information. Please check with your Karma
Automotive Retailer and Karma Automotive service provider that the bulletin you intend to use contains the latest available information.
Page 5 of 5
Published: February 2026
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TSB/Document ID: CC-26-90-01
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-09
MFR Internal Campaign ID/Software Version: ECM Version ID: 621–21–96
Communication Type: Service Campaign
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System: powertrain
MFR Component Subsystem: engine electrical
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