2025 Cadillac CT4 Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 84938163.

This table covers the Alternator / Generator bolts. Read more

This group shows a single part: GM GENUINE 11611102.

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

22 Battery parts for the 2025 Cadillac CT4 come from 7 brands — ACDELCO, DEKA, EXIDE and 4 other brands. The "Popular" part is DEKA 9A48.

In the AGM (Extended Life) grade, DEKA, ACDELCO, BOSCH and 3 other brands supply 8 parts: grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. A representative part number is DEKA 9A48.

In the Performance AGM (Extended Life + Increased Power) grade, FULLRIVER supplies 1 part: grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. A representative part number is FULLRIVER FT85094R.

13 further parts sit outside the graded sections, with the same engine-level match.

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

GM GENUINE supplies the 4 Battery Cable parts for the 2025 Cadillac CT4. 1 part fits every engine; the other 3 are engine-specific.

Listed part numbers: GM GENUINE 42934095, GM GENUINE 86801288 and GM GENUINE 85011509, plus the other parts above.

This table covers the clamps and brackets that secure the battery. Read more

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 11609585.

This table covers the Battery Vent tubes. Read more

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 85665279.

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

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 13548775.

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

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 84930206.

This table covers the resettable circuit breakers in this vehicle's electrical system. Read more

This group shows a single part: GM GENUINE 84215440.

This table covers the Cruise Control Distance 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

This group shows a single part: GM GENUINE 86558605.

This table covers the Cruise control modules. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT4.

This group includes GM GENUINE 85031657 and GM GENUINE 85776845.

This table covers the engine-control modules that run fuel, spark and emissions. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT4.

This group includes GM GENUINE 12725415 and GM GENUINE 12740833.

This table covers the Engine Control Module (ECM Computer) bolts. Read more

This group shows a single part: GM GENUINE 11519377.

This table covers the brackets that mount the Engine Control Module (ECM Computer). 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

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 84799323.

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

8 Fuse parts for the 2025 Cadillac CT4 come from 2 brands — GM GENUINE and ACDELCO. The "Popular" part is GM GENUINE 15305191.

In the 100 Amp grade, GM GENUINE supplies 1 part: grouped under the catalog's "100 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 84070942.

The 150 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "150 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 84070922 is listed in this group.

In the 175 Amp grade, GM GENUINE supplies 1 part: grouped under the catalog's "175 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 15305191.

In the 250 Amp grade, GM GENUINE supplies 1 part: grouped under the catalog's "250 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 84116255.

The 350 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "350 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 84116257 is listed in this group.

In the 50 Amp grade, ACDELCO supplies 1 part: grouped under the catalog's "50 Amp" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO MAX50.

In the 70 Amp grade, GM GENUINE supplies 2 parts: grouped under the catalog's "70 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 84070937.

Part numbers include GM GENUINE 15305191, GM GENUINE 84070942 and GM GENUINE 84070922, among others listed above.

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

2 Horn parts for the 2025 Cadillac CT4 come from GM GENUINE.

This group includes GM GENUINE 84849439 and GM GENUINE 84849440.

This table covers the Jumper cables. 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

GM GENUINE supplies both parts for the 2025 Cadillac CT4.

Listed part numbers: GM GENUINE 86801278 and GM GENUINE 86807282.

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

9 Keyless Entry Remote parts are listed for the 2025 Cadillac CT4, from GM GENUINE and DORMAN. DORMAN 99762ST carries the "Popular" badge.

Listed part numbers: DORMAN 99762ST, GM GENUINE 13560906 and GM GENUINE 85043355, plus the other parts above.

This table covers the Lane Departure 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 2025 Cadillac CT4 — GM GENUINE 86517920.

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

This group shows a single part: GM GENUINE 84761801.

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

2 Parking Aid Sensor parts are listed for the 2025 Cadillac CT4, from GM GENUINE and TECHPRO.

Listed part numbers: GM GENUINE 84586217 and TECHPRO GM1175107.

This table covers the brackets that mount the Parking Aid Sensor. 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

GM GENUINE supplies both parts for the 2025 Cadillac CT4.

Part numbers include GM GENUINE 84637866 and GM GENUINE 84637867.

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

This group shows a single part: GM GENUINE 13563696.

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

GM GENUINE supplies the 3 Rain Sensor parts for the 2025 Cadillac CT4.

This group includes GM GENUINE 85880852, GM GENUINE 85880857 and GM GENUINE 85880858.

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

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 13545362.

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

GM GENUINE supplies the 4 Side Object Sensor Module parts for the 2025 Cadillac CT4.

Part numbers include GM GENUINE 85826110, GM GENUINE 85826109 and GM GENUINE 86558606, among others listed above.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

10 Speed Sensor parts for the 2025 Cadillac CT4 come from 2 brands — GM GENUINE and STANDARD MOTOR PRODUCTS. The "Popular" part is GM GENUINE 24299509.

This table covers the Speed Sensor Reluctor rings. Read more

This group shows a single part: GM GENUINE 24293560.

This table covers the Starter bolts. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT4.

Listed part numbers: GM GENUINE 11588740 and GM GENUINE 11588749.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

4 Starter Motor parts are listed for the 2025 Cadillac CT4, from GM GENUINE, REMY and TERREPOWER.

In the New grade, GM GENUINE supplies 1 part: brand-new units rather than rebuilt ones. A representative part number is GM GENUINE 12652028.

In the Remanufactured grade, REMY and TERREPOWER supply 2 parts: factory-rebuilt units with new wear components. A representative part number is REMY 26012.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

Part numbers include GM GENUINE 12652028, REMY 26012 and TERREPOWER 19289, among others listed above.

This table covers the Video control modules. Read more

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 42937248.

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

This group shows a single part: GM GENUINE 85532096.