2026 Cadillac Optiq Electrical Parts

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

5 Battery parts are listed for the 2026 Cadillac Optiq, from ACDELCO, DEKA and FVP. ACDELCO 47AGM carries the "Popular" badge.

This group includes ACDELCO 47AGM, ACDELCO EVLN2AGM and ACDELCO 47SAGM and the remaining parts above.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

This group shows a single part: GM GENUINE 86331812.

This table covers the Battery Terminal Bolt nuts. Read more

2 Battery Terminal Bolt / Nut parts for the 2026 Cadillac Optiq come from GM GENUINE.

This group includes GM GENUINE 11546449 and GM GENUINE 11570961.

This table covers the body-control modules that run lighting, locks and wipers. Read more

2 Body Control Module (BCM) parts for the 2026 Cadillac Optiq come from GM GENUINE.

This group includes GM GENUINE 13563015 and GM GENUINE 13568206.

This table covers the brackets that mount the Body Control Module (BCM). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 85040303.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

25 Fuse parts are listed for the 2026 Cadillac Optiq, from GM GENUINE and ACDELCO. GM GENUINE 12004008 carries the "Popular" badge.

The 10 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 19209792 is listed in this group.

The 100 Amp section lists 2 options from GM GENUINE — grouped under the catalog's "100 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 84070942 is listed in this group.

In the 15 Amp grade, GM GENUINE and ACDELCO supply 3 parts: grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 12004008.

In the 150 Amp grade, GM GENUINE supplies 1 part: grouped under the catalog's "150 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 84070922.

The 175 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "175 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 15305191 is listed in this group.

In the 20 Amp grade, GM GENUINE and ACDELCO supply 2 parts: grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 12004009.

The 25 Amp section lists 3 options from ACDELCO and GM GENUINE — grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. ACDELCO ATM2525 is listed in this group.

The 250 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "250 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 84116255 is listed in this group.

The 30 Amp section lists 3 options from ACDELCO and GM GENUINE — grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. ACDELCO ATC30 is listed in this group.

In the 350 Amp grade, GM GENUINE supplies 1 part: grouped under the catalog's "350 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 84116257.

In the 40 Amp grade, ACDELCO and GM GENUINE supply 2 parts: grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO MAX405.

The 5 Amp section lists 1 option from ACDELCO — grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. ACDELCO ATC525 is listed in this group.

The 50 Amp section lists 1 option from ACDELCO — grouped under the catalog's "50 Amp" designation — the notes column spells out what sets them apart. ACDELCO MAX50 is listed in this group.

In the 60 Amp grade, ACDELCO supplies 1 part: grouped under the catalog's "60 Amp" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO MAX605.

The 70 Amp section lists 2 options from GM GENUINE — grouped under the catalog's "70 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 84070937 is listed in this group.

This table covers the Fuse Box covers. Read more

GM GENUINE supplies the 4 Fuse Box Cover parts for the 2026 Cadillac Optiq.

Part numbers include GM GENUINE 85524381, GM GENUINE 87861034 and GM GENUINE 87861035, among others listed above.

This table covers the horns mounted in the front of the vehicle. Read more

GM GENUINE supplies both parts for the 2026 Cadillac Optiq.

Listed part numbers: GM GENUINE 86326188 and GM GENUINE 86326189.

This table covers the horn contacts in the steering column. Read more

One part is listed for the 2026 Cadillac Optiq — GM GENUINE 87840626.

This table covers the receivers that pick up the key-fob unlock signal. Read more

6 Keyless Entry Module / Receiver parts for the 2026 Cadillac Optiq come from GM GENUINE. The "Popular" part is GM GENUINE 85026368.

Listed part numbers: GM GENUINE 85026368, GM GENUINE 86320144 and GM GENUINE 86320145, plus the other parts above.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

4 Keyless Entry Remote parts for the 2026 Cadillac Optiq come from GM GENUINE.

This group includes GM GENUINE 13560554, GM GENUINE 85842469 and GM GENUINE 85842470 and the remaining parts above.

This table covers the modules that control the exterior lighting. Read more

This group shows a single part: GM GENUINE 13566314.

This table covers the Park Assist (PAS) Camera modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2026 Cadillac Optiq — GM GENUINE 86558042.

This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

This group shows a single part: GM GENUINE 87821667.

This table covers the totally-integrated power modules that distribute body electrical power. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2026 Cadillac Optiq — GM GENUINE 86285468.

This table covers the Rain sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

2 Rain Sensor parts for the 2026 Cadillac Optiq come from GM GENUINE.

This group includes GM GENUINE 85880852 and GM GENUINE 85880857.

This table covers the Serial Data Gateway modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 13566572.

This table covers the Side Object Sensor modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

2 Side Object Sensor Module parts for the 2026 Cadillac Optiq come from GM GENUINE.

Part numbers include GM GENUINE 85698872 and GM GENUINE 85698873.

This table covers the Wiring Harness clips. Read more

This group shows a single part: GM GENUINE 11589295.

This table covers the Yaw sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

One part is listed for the 2026 Cadillac Optiq — GM GENUINE 85532096.