2025 Cadillac CT5 Engine Parts

This table covers the camshafts that open the valves. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12742438.

This table covers the Camshaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT5.

This group includes GM GENUINE 19260874 and GM GENUINE 12686894.

This table covers the Camshaft bolts. Read more

This group shows a single part: GM GENUINE 11561455.

This table covers the Camshaft Dowel pins. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 24575061.

This table covers the Camshaft Retainer / Thrust plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts. Read more

2 Camshaft Retainer / Thrust Plate parts for the 2025 Cadillac CT5 come from 2 brands — FEL-PRO and GM GENUINE.

This group includes FEL-PRO ES73115 and GM GENUINE 12589016.

This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12735504.

This table covers the Connecting Rod bolts. Read more

This group shows a single part: GM GENUINE 11548432.

This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

This group shows a single part: GM GENUINE 12729655.

This table covers the Crankshaft Main Bearing Cap bolts. Read more

GM GENUINE supplies the 3 Crankshaft Main Bearing Cap Bolt parts for the 2025 Cadillac CT5.

Listed part numbers: GM GENUINE 11546565, GM GENUINE 11548076 and GM GENUINE 11548075.

This table covers the front and rear seals that keep oil in at the crankshaft. 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

5 Crankshaft Seal parts for the 2025 Cadillac CT5 come from 4 brands — GM GENUINE, ACDELCO, FEL-PRO and 1 other brand. The "Popular" part is GM GENUINE 89060436.

This group includes GM GENUINE 89060436, ACDELCO 100085 and FEL-PRO TCS46221 and the remaining parts above.

This table covers the Crankshaft Seal covers. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12705665.

This table covers the gaskets that seal the Crankshaft Seal. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12627520.

This table covers the cylinder heads that close the top of the block. Read more

This group shows a single part: GM GENUINE 12699619.

This table covers the Cylinder Head Alignment Dowel pins. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12570326.

This table covers the bolts that clamp the cylinder head to the block. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT5.

This group includes GM GENUINE 11611976 and GM GENUINE 11546959.

This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12654622.

This table covers the Cylinder Head plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

This group shows a single part: GM GENUINE 24502262.

This table covers the Engine Block drain plugs. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11602951.

This table covers the Engine Cover grommets. Read more

This group shows a single part: GM GENUINE 12594875.

This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

2 Exhaust Valve parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

Listed part numbers: GM GENUINE 12678746 and MELLING V5815.

This table covers the crankshaft pulleys / harmonic balancers at the front of the engine. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12713718.

This table covers the Harmonic Balancer bolts. Read more

2 Harmonic Balancer Bolt parts for the 2025 Cadillac CT5 come from 2 brands — FEL-PRO and GM GENUINE.

Part numbers include FEL-PRO 73372 and GM GENUINE 11547372.

This table covers the Intake insulators. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12684570.

This table covers the Intake Manifold bolts. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11546958.

This table covers the Intake Manifold covers. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12684569.

This table covers the gaskets between the intake manifold and the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12679527.

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

2 Intake Valve parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

Listed part numbers: GM GENUINE 12650770 and MELLING V5814.

This table covers the mounts that hold the engine to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

2 Motor Mount parts for the 2025 Cadillac CT5 come from GM GENUINE.

Listed part numbers: GM GENUINE 84146161 and GM GENUINE 84288957.

This table covers the Motor Mount bolts. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11549341.

This table covers the brackets that mount the Motor Mount. 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

2 Motor Mount Bracket parts for the 2025 Cadillac CT5 come from GM GENUINE.

Part numbers include GM GENUINE 84146176 and GM GENUINE 84146182.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

2 Oil parts for the 2025 Cadillac CT5 come from MOBIL.

Listed part numbers: MOBIL 112628 and MOBIL 126870.

This table covers the Oil check valves. Read more

This group shows a single part: GM GENUINE 12670540.

This table covers the heat exchangers that cool engine oil. Typical signs include oil at the cooler fittings, or coolant that looks like a milkshake. Pressure-test both circuits after a cooler swap — a leak here mixes oil and coolant. Read more

This group shows a single part: GM GENUINE 12728454.

This table covers the gaskets that seal the Oil Cooler. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — DORMAN 66219.

This table covers the harness connectors at the Oil Cooler Line. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12662820.

This table covers the seals at the Oil Cooler. 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

2 Oil Cooler Seal parts are listed for the 2025 Cadillac CT5, from ELRING and GM GENUINE.

This group includes ELRING B17840 and GM GENUINE 12733672.

This table covers the Oil Dipstick tubes. Read more

2 Oil Dipstick / Tube parts for the 2025 Cadillac CT5 come from GM GENUINE.

This group includes GM GENUINE 12660373 and GM GENUINE 12724824.

This table covers the seals at the Oil Dipstick / 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

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 24504031.

This table covers the drain plugs in the oil pan. Read more

4 Oil Drain Plug parts for the 2025 Cadillac CT5 come from 2 brands — DORMAN and GM GENUINE.

Listed part numbers: DORMAN 090034, DORMAN 090175 and GM GENUINE 11562588, plus the other parts above.

This table covers the crush washers and gaskets under the oil drain plug. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12616850.

This table covers the Oil Drain Plug inserts. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11503302.

This table covers the caps on the oil filler neck. Read more

This group shows a single part: ACDELCO FC265.

This table covers the gaskets that seal the Oil Filler Cap. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 24100002.

This table covers the Oil Filler tubes. Read more

This group shows a single part: GM GENUINE 12668614.

This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive. Read more

11 Oil Filter parts for the 2025 Cadillac CT5 come from 8 brands — FVP, WIX, ACDELCO and 5 other brands. The "Popular" part is WIX WL10290XP.

The Economy section lists 5 options from CHAMP / LUBER-FINER, FRAM, FVP and 2 other brands — the catalog's value-priced group. CHAMP / LUBER-FINER PH10064 is listed in this group.

The High Performance / Heavy Duty section lists 2 options from WIX and MOBIL — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. WIX WL10290XP is listed in this group.

In the Standard Replacement grade, ACDELCO, WIX and FVP supply 4 parts: built to original-equipment specification. A representative part number is ACDELCO PF64.

This table covers the Oil Galley plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

This group shows a single part: GM GENUINE 11546667.

This table covers the Oil Level 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 12696433.

This table covers the Oil Level Sensor Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

This group shows a single part: GM GENUINE 12638820.

This table covers the gaskets that seal the Oil Manifold. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12698625.

This table covers the Oil nozzles. Read more

This group shows a single part: GM GENUINE 12678499.

This table covers the oil pans that hold the engine's oil sump. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12739243.

This table covers the Oil Pan bolts. Read more

2 Oil Pan Bolt parts for the 2025 Cadillac CT5 come from GM GENUINE.

Listed part numbers: GM GENUINE 12554990 and GM GENUINE 11588725.

This table covers the gaskets between the oil pan and the block. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

2 Oil Pan Gasket parts for the 2025 Cadillac CT5 come from GM GENUINE.

Listed part numbers: GM GENUINE 12666993 and GM GENUINE 12621086.

This table covers the Oil Pressure filters. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12623757.

This table covers the Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

2 Oil Pump parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

This group includes GM GENUINE 12744612 and MELLING M595.

This table covers the Oil Pump bolts. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11610074.

This table covers the Oil Pump Control Valve solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12686431.

This table covers the seals at the Oil Pump Control Valve / Solenoid. 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 12626252.

This table covers the gaskets that seal the Oil Pump. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12638433.

This table covers the windage trays that keep crank windage out of the oil sump. Read more

This group shows a single part: GM GENUINE 12644848.

This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo. Read more

GM GENUINE supplies both parts for the 2025 Cadillac CT5.

Part numbers include GM GENUINE 19431932 and GM GENUINE 19431933.

This table covers the Piston Pin retainers. Read more

This group shows a single part: GM GENUINE 12569638.

This table covers the rings that seal each piston to the cylinder wall. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12735470.

This table covers the pushrods that transfer lifter motion to the rocker arms. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 12619828.

This table covers the rocker arms that transfer cam motion to the valves. Read more

2 Rocker Arm parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

This group includes GM GENUINE 12619829 and MELLING MR913.

This table covers the Supercharger Bypass Solenoid / Valve actuators. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

This group shows a single part: GM GENUINE 12718831.

This table covers the gaskets that seal the Supercharger. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: GM GENUINE 12642740.

This table covers the Supercharger pressure sensors. Typical signs include a check-engine light for MAP or fuel-rail pressure, or a limp mode under load. A vacuum leak or a clogged reference line will fake a bad pressure sensor. Read more

2 Supercharger Pressure Sensor parts for the 2025 Cadillac CT5 come from GM GENUINE.

This group includes GM GENUINE 25203651 and GM GENUINE 12711681.

This table covers the timing chains that keep the cams in time with the crank. Read more

2 Timing Chain parts are listed for the 2025 Cadillac CT5, from GM GENUINE and MELLING.

Part numbers include GM GENUINE 12646387 and MELLING 3SRH60.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

2 Timing Chain & Component Kit parts for the 2025 Cadillac CT5 come from MELLING.

This group includes MELLING 33SRH60SX and MELLING 33SRH60SE.

This table covers the tensioners that keep the timing chain taut. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

3 Timing Chain Tensioner parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

Part numbers include GM GENUINE 11515758, GM GENUINE 12630107 and MELLING BT5174.

This table covers the Timing covers. Read more

2 Timing Cover parts are listed for the 2025 Cadillac CT5, from GM GENUINE and SKP.

Listed part numbers: GM GENUINE 12691692 and SKP SK12691692.

This table covers the crankshaft sprockets that drive the timing chain or belt. Read more

2 Timing Crank Sprocket parts for the 2025 Cadillac CT5 come from 2 brands — GM GENUINE and MELLING.

Listed part numbers: GM GENUINE 12713934 and MELLING S1355.

This table covers the Valve Cover Bolt screws. Typical signs include a rounded head, a seeping bleeder, or a fastener that will not hold torque. Do not force a new screw into a stripped hole — repair the thread first. Read more

One part is listed for the 2025 Cadillac CT5 — GM GENUINE 11547061.

This table covers the gaskets that seal the valve cover to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

2 Valve Cover Gasket parts for the 2025 Cadillac CT5 come from 2 brands — FEL-PRO and GM GENUINE.

This group includes FEL-PRO VS50907R and GM GENUINE 12619787.

This table covers the Valve Lash caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

This group shows a single part: GM GENUINE 12596509.

This table covers the lifters / tappets that transfer cam motion to the valves. Read more

4 Valve Lifter parts for the 2025 Cadillac CT5 come from 3 brands — GM GENUINE, MELLING and QUALCAST.

Listed part numbers: GM GENUINE 12698945, GM GENUINE 12740071 and MELLING JB8011, plus the other parts above.

This table covers the guides that keep each lifter aligned. Read more

2 Valve Lifter Guide parts for the 2025 Cadillac CT5 come from GM GENUINE.

Listed part numbers: GM GENUINE 12669185 and GM GENUINE 12669184.

This table covers the springs that close each intake and exhaust valve. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

2 Valve Spring parts are listed for the 2025 Cadillac CT5, from GM GENUINE and MELLING.

Part numbers include GM GENUINE 12728729 and MELLING VS2488.

This table covers the Valve Spring retainers. Read more

3 Valve Spring Retainer parts are listed for the 2025 Cadillac CT5, from GM GENUINE and MELLING.

Listed part numbers: GM GENUINE 12654813, GM GENUINE 10166344 and MELLING VSR709.

This table covers the keepers that lock each valve-spring retainer to the stem. Read more

2 Valve Spring Retainer Keeper parts are listed for the 2025 Cadillac CT5, from GM GENUINE and MELLING.

This group includes GM GENUINE 10166345 and MELLING VL760.

This table covers the seals on each valve stem that control oil into the guides. 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

2 Valve Stem Seal parts for the 2025 Cadillac CT5 come from GM GENUINE.

Listed part numbers: GM GENUINE 12689006 and GM GENUINE 12689007.

This table covers the oil-control solenoids that command the cam phasers. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

2 Variable Valve Timing (VVT) Solenoid / Actuator parts for the 2025 Cadillac CT5 come from GM GENUINE.

This group includes GM GENUINE 12675031 and GM GENUINE 12746597.

This table covers the seals at the Variable Valve Timing (VVT) Solenoid Gasket. 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 CT5 — GM GENUINE 12623437.

This table covers the cam phaser sprockets used by the variable-valve-timing system. Read more

This group shows a single part: GM GENUINE 12682501.