2026 Cadillac CT5 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 2026 Cadillac CT5 — GM GENUINE 13561037.

This table covers the Alternator / Generator bolts. Read more

This group shows a single part: GM GENUINE 11611102.

This table covers the sirens in the anti-theft system. Read more

This group shows a single part: GM GENUINE 13569122.

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

6 Battery parts for the 2026 Cadillac CT5 come from 4 brands — DEKA, ACDELCO, BOSCH and 1 other brand. The "Popular" part is DEKA 9A48.

Part numbers include DEKA 9A48, DEKA 9A94R and ACDELCO 94RAGMHR, among others listed 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

GM GENUINE supplies both parts for the 2026 Cadillac CT5.

Listed part numbers: GM GENUINE 42934096 and GM GENUINE 86801288.

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

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 11609585.

This table covers the Battery Terminal Bolt nuts. Read more

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 11610091.

This table covers the Battery Vent tubes. Read more

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 85665279.

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

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 13559486.

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 2026 Cadillac CT5 — 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 engine-control modules that run fuel, spark and emissions. Read more

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 12725415.

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 2026 Cadillac CT5 — GM GENUINE 84743868.

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

13 Fuse parts for the 2026 Cadillac CT5 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 125 Amp section lists 1 option from GM GENUINE — grouped under the catalog's "125 Amp" designation — the notes column spells out what sets them apart. GM GENUINE 12177251 is listed in this group.

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.

In the 30 Amp grade, ACDELCO and GM GENUINE supply 3 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 22917202.

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 5 Amp grade, ACDELCO supplies 1 part: grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO ATC525.

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.

This table covers the Hands Free Vehicle Access 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 CT5 — GM GENUINE 85860567.

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

2 Horn parts for the 2026 Cadillac CT5 come from GM GENUINE.

Part numbers include 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

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 86801276.

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

4 Keyless Entry Remote parts are listed for the 2026 Cadillac CT5, from GM GENUINE and DORMAN.

This group includes DORMAN 99762ST, GM GENUINE 13560906 and GM GENUINE 85043351 and the remaining parts above.

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

One part is listed for the 2026 Cadillac CT5 — 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

This group shows a single part: GM GENUINE 84983035.

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

GM GENUINE supplies the 3 Parking Aid Sensor parts for the 2026 Cadillac CT5.

Listed part numbers: GM GENUINE 84586217, GM GENUINE 87821667 and GM GENUINE 87821666.

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 the 4 Parking Aid Sensor Bracket parts for the 2026 Cadillac CT5.

Listed part numbers: GM GENUINE 42799262, GM GENUINE 42799263 and GM GENUINE 42799274, plus the other parts above.

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 both parts for the 2026 Cadillac CT5.

Listed part numbers: GM GENUINE 85880852 and GM GENUINE 85880857.

This table covers the Security System Infrared 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 CT5 — GM GENUINE 85827058.

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

GM GENUINE supplies both parts for the 2026 Cadillac CT5.

This group includes GM GENUINE 13545362 and GM GENUINE 13558602.

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 3 Side Object Sensor Module parts for the 2026 Cadillac CT5.

This group includes GM GENUINE 85698872, GM GENUINE 86558606 and GM GENUINE 85698873.

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

4 Speed Sensor parts for the 2026 Cadillac CT5 come from GM GENUINE.

Part numbers include GM GENUINE 24060865, GM GENUINE 24043446 and GM GENUINE 24293126, among others listed above.

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

One part is listed for the 2026 Cadillac CT5 — 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

One part is listed for the 2026 Cadillac CT5 — GM GENUINE 12730141.

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.