2025 Cadillac CT4 Ignition Parts

This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor. Read more

7 Camshaft Position Sensor parts for the 2025 Cadillac CT4 come from 4 brands — AUTOTECNICA, GM GENUINE, WELLS and 1 other brand. The "Popular" part is GM GENUINE 12684186.

The Economy section lists 3 options from AUTOTECNICA and HOLSTEIN — the catalog's value-priced group. AUTOTECNICA GM1322533 is listed in this group.

In the Standard Replacement grade, GM GENUINE and WELLS supply 2 parts: built to original-equipment specification. A representative part number is GM GENUINE 12684186.

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

This group includes GM GENUINE 12684186, AUTOTECNICA GM1322533 and AUTOTECNICA GM1323054 and the remaining parts above.

This table covers the seals at the Camshaft Position Sensor. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

One part is listed for the 2025 Cadillac CT4 — GM GENUINE 12626252.

This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor. Read more

5 Crankshaft Position Sensor parts for the 2025 Cadillac CT4 come from 3 brands — GM GENUINE, WELLS and HOLSTEIN.

The Economy section: 1 option from HOLSTEIN. HOLSTEIN 2CRK0307 is listed in this group.

Standard Replacement: 2 parts, from GM GENUINE and WELLS. A representative part number is GM GENUINE 2134573.

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

Part numbers include HOLSTEIN 2CRK0307, GM GENUINE 2134573 and WELLS 5S12643, among others listed above.

This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off. Read more

8 Ignition Coil parts for the 2025 Cadillac CT4 come from 7 brands — GM GENUINE, SKP, HOLSTEIN and 4 other brands. The "Popular" part is SKP SKIC087.

The Economy section: 3 options from SKP, HOLSTEIN and STANDARD MOTOR PRODUCTS. SKP SKIC087 is listed in this group.

In the Premium grade, ASTEMO / HITACHI supplies 1 part: a step above OE specification in materials, tolerances or warranty terms. A representative part number is ASTEMO / HITACHI IGC0173.

Standard Replacement: 3 parts, from GM GENUINE, DENSO and WELLS. A representative part number is GM GENUINE D515C.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include SKP SKIC087, HOLSTEIN 2IGC0137 and STANDARD MOTOR PRODUCTS UF569T, among others listed above.

This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine. Read more

5 Spark Plug parts are listed for the 2025 Cadillac CT4, from ACDELCO, NGK and SKP.

This group includes ACDELCO 41106IP, ACDELCO 41147 and NGK 94956 and the remaining parts above.

This table covers the silicone and rubber boots that insulate the coil-to-plug spark path. Typical signs include a misfire in the rain, carbon tracking on the boot, or a snap when you pop the coil off. Replace boots as a set on a high-mileage engine; one cracked boot will take the coil with it. Read more

This group shows a single part: GM GENUINE 12711622.

This table covers the seals at the Spark Plug Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: GM GENUINE 12607600.