2025 Chevrolet Suburban Engine Parts

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

4 Camshaft parts for the 2025 Chevrolet Suburban come from 2 brands — GM GENUINE and MELLING.

Part numbers include GM GENUINE 40009063, GM GENUINE 12723516 and GM GENUINE 12664912, among others listed above.

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

2 Camshaft Bearing parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 12679049 and GM GENUINE 12686894.

This table covers the Camshaft bolts. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 55496367 and GM GENUINE 11561455.

This table covers the Camshaft Dowel pins. Read more

This group shows a single part: 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 are listed for the 2025 Chevrolet Suburban, from FEL-PRO and GM GENUINE.

Listed part numbers: FEL-PRO ES73115 and GM GENUINE 12589016.

This table covers the connecting rods between each piston and the crankshaft. Read more

2 Connecting Rod parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 12649190 and GM GENUINE 12714549.

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

3 Connecting Rod Bearing parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Listed part numbers: GM GENUINE 55490523, GM GENUINE 12668160 and GM GENUINE 12735504.

This table covers the Connecting Rod bolts. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 11570662 and GM GENUINE 11548432.

This table covers the Crankcase 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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12743331.

This table covers the crankshafts that turn piston motion into rotation. Read more

2 Crankshaft parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Part numbers include GM GENUINE 40009035 and GM GENUINE 12685650.

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

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

Part numbers include GM GENUINE 12729654 and GM GENUINE 12729655.

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

3 Crankshaft Main Bearing Cap Bolt parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes 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 are listed for the 2025 Chevrolet Suburban, from GM GENUINE and FEL-PRO.

Part numbers include FEL-PRO TCS46221, GM GENUINE 55509254 and GM GENUINE 40009072, among others listed above.

This table covers the Crankshaft Seal covers. Read more

2 Crankshaft Seal Cover parts for the 2025 Chevrolet Suburban come from 2 brands — DORMAN and GM GENUINE.

Part numbers include DORMAN 635786 and GM GENUINE 12705663.

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

This group shows a single part: GM GENUINE 12627520.

This table covers the kits that disable cylinder deactivation. Read more

One part is listed for the 2025 Chevrolet Suburban — MELLING MDK700HPT3.

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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12698289.

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

This group shows a single part: GM GENUINE 12570326.

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

3 Cylinder Head Bolt parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Part numbers include GM GENUINE 11547739, 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

3 Cylinder Head Gasket parts for the 2025 Chevrolet Suburban come from 2 brands — GM GENUINE and ENGINE PRO.

Listed part numbers: ENGINE PRO 2812058420, GM GENUINE 12622325 and GM GENUINE 12688943.

This table covers multi-piece gasket sets for a cylinder-head job. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

This group shows a single part: GM GENUINE 12700996.

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

GM GENUINE supplies the 3 Cylinder Head Plug parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 11570754, GM GENUINE 12691176 and GM GENUINE 24502262.

This table covers the Engine Block drain plugs. Read more

3 Engine Block Drain Plug parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Listed part numbers: GM GENUINE 11548315, GM GENUINE 11602951 and GM GENUINE 11546667.

This table covers the block heaters that warm the coolant or oil in cold weather. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12586687.

This table covers the Engine covers. Read more

5 Engine Cover parts for the 2025 Chevrolet Suburban come from 2 brands — TECHPRO and VARIOUS MFR. The "Popular" part is TECHPRO GM1228179. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

This group includes TECHPRO GM1228179, TECHPRO GM1228182 and TECHPRO GM1228173 and the remaining parts above.

This table covers the Engine Cover grommets. Read more

GM GENUINE supplies the 3 Engine Cover Grommet parts for the 2025 Chevrolet Suburban. 1 part fits every engine; the other 2 are engine-specific.

Listed part numbers: GM GENUINE 12594875, GM GENUINE 12737359 and GM GENUINE 12661056.

This table covers the Engine Cover retainers and clips. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 10121502 and GM GENUINE 11518792.

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

6 Exhaust Valve parts are listed for the 2025 Chevrolet Suburban, from MELLING, GM GENUINE and SBI.

Listed part numbers: GM GENUINE 12678745, GM GENUINE 12678746 and MELLING V5846, plus the other parts above.

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

2 Harmonic Balancer parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 55512109 and GM GENUINE 12680364.

This table covers the Harmonic Balancer bolts. Read more

2 Harmonic Balancer Bolt parts are listed for the 2025 Chevrolet Suburban, from FEL-PRO and GM GENUINE.

Listed part numbers: FEL-PRO 73372 and GM GENUINE 11547372.

This table covers the Intake insulators. Read more

This group shows a single part: GM GENUINE 12559120.

This table covers the Intake manifolds. Typical signs include an exhaust tick, a vacuum leak, or a gasket that has burned through. Replace the gaskets and hardware; a warped flange will leak with a new gasket alone. Read more

GM GENUINE supplies the 3 Intake Manifold parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 40009521, GM GENUINE 12623417 and GM GENUINE 12639087.

This table covers the Intake Manifold bolts. Read more

3 Intake Manifold Bolt parts for the 2025 Chevrolet Suburban come from GM GENUINE. 1 part fits every engine; the other 2 are engine-specific.

Listed part numbers: GM GENUINE 11610472, GM GENUINE 11588352 and GM GENUINE 11611692.

This table covers the Intake Manifold covers. Read more

This group shows a single part: GM GENUINE 40009488.

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

3 Intake Manifold Gasket parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 55503127, GM GENUINE 12626354 and GM GENUINE 12693081.

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

5 Intake Valve parts are listed for the 2025 Chevrolet Suburban, from MELLING, GM GENUINE and SBI.

Part numbers include GM GENUINE 12619825, MELLING V5847 and MELLING V3432, among others listed above.

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

10 Motor Mount parts are listed for the 2025 Chevrolet Suburban, from ANCHOR and GM GENUINE. GM GENUINE 85806750 carries the "Popular" badge.

This table covers the Motor Mount bolts. Read more

This group shows a single part: GM GENUINE 11548893.

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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 85126631.

This table covers the Motor Mount kits. Read more

ANCHOR supplies the 6 Motor Mount Kit parts for the 2025 Chevrolet Suburban.

This group includes ANCHOR 301046, ANCHOR 301045 and ANCHOR 300852 and the remaining parts above.

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

20 Oil parts are listed for the 2025 Chevrolet Suburban, from MOBIL, LIQUI MOLY, VALVOLINE and 3 other brands. ACDELCO 109302 carries the "Popular" badge.

In the Full Synthetic grade, LIQUI MOLY, MOBIL, VALVOLINE and 3 other brands supply 15 parts: full-synthetic oils. A representative part number is ACDELCO 109302.

The High Mileage (>75,000 Miles) section lists 2 options from MOBIL — oils grouped for high-mileage engines. MOBIL 122535 is listed in this group.

3 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the Oil check valves. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 55563957.

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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 40009478.

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

3 Oil Cooler Gasket parts for the 2025 Chevrolet Suburban come from 3 brands — ACDELCO, DORMAN and GM GENUINE. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include ACDELCO 55488933, DORMAN 66219 and GM GENUINE 23129010.

This table covers the Oil Cooler lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 85724972.

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

2 Oil Cooler Line Connector parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 11547061 and GM GENUINE 84240291.

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

This group shows a single part: GM GENUINE 55507117.

This table covers the Oil Dipstick tubes. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12664925.

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

2 Oil Dipstick / Tube Seal parts for the 2025 Chevrolet Suburban come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes GM GENUINE 24504031 and GM GENUINE 12670252.

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

7 Oil Drain Plug parts are listed for the 2025 Chevrolet Suburban, from GM GENUINE and DORMAN.

Listed part numbers: DORMAN 65416, DORMAN 090948CD and DORMAN 090948, 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

This group shows a single part: GM GENUINE 12616850.

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

4 Oil Filler Cap parts are listed for the 2025 Chevrolet Suburban, from ACDELCO, DORMAN and MOTORAD.

Part numbers include ACDELCO FC276, ACDELCO 12713785 and DORMAN 90202, among others listed above.

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

This group shows a single part: GM GENUINE 24100002.

This table covers the Oil Filler tubes. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12691785.

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

20 Oil Filter parts are listed for the 2025 Chevrolet Suburban, from WIX, ACDELCO, VARIOUS MFR and 5 other brands. WIX WL10255XP carries the "Popular" badge.

In the Economy grade, FVP, PRO-TEC, VARIOUS MFR and 1 other brand supply 7 parts: the catalog's value-priced group. A representative part number is FRAM FE10575.

In the High Performance / Heavy Duty grade, WIX and MOBIL supply 4 parts: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is WIX WL10255XP.

The Standard Replacement section lists 9 options from ACDELCO, WIX, HASTINGS / BALDWIN and 1 other brand — built to original-equipment specification. ACDELCO PF66 is listed in this group.

This table covers the Oil Filter adapters. Read more

This group shows a single part: GM GENUINE 12600225.

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

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 09427695 and 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

One part is listed for the 2025 Chevrolet Suburban — 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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12638820.

This table covers the Oil nozzles. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 40009357 and GM GENUINE 12678499.

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

2 Oil Pan parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 40009800 and GM GENUINE 12739177.

This table covers the Oil Pan bolts. Read more

GM GENUINE supplies the 3 Oil Pan Bolt parts for the 2025 Chevrolet Suburban.

Part numbers include GM GENUINE 11548002, GM GENUINE 12554990 and GM GENUINE 11588725.

This table covers the Oil Pan covers. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12630766.

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

GM GENUINE supplies the 6 Oil Pan Gasket parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 55496126, GM GENUINE 55500219 and GM GENUINE 55502649 and the remaining parts above.

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

GM GENUINE supplies both parts for the 2025 Chevrolet Suburban.

This group includes GM GENUINE 12744611 and GM GENUINE 12744612.

This table covers the Oil Pump bolts. Read more

2 Oil Pump Bolt parts for the 2025 Chevrolet Suburban come from GM GENUINE.

This group includes GM GENUINE 11547739 and 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

This group shows a single part: 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

One part is listed for the 2025 Chevrolet Suburban — 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

2 Oil Pump Gasket parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Listed part numbers: GM GENUINE 55500219 and GM GENUINE 12638433.

This table covers the Oil Pump Shaft Guide retainers. Read more

This group shows a single part: GM GENUINE 55496318.

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

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12619978.

This table covers the Oil Temperature senders. Read more

This group shows a single part: GM GENUINE 55494665.

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

9 Piston parts for the 2025 Chevrolet Suburban come from GM GENUINE.

Listed part numbers: GM GENUINE 40009568, GM GENUINE 12656877 and GM GENUINE 12656876, plus the other parts above.

This table covers the Piston Pin retainers. Read more

One part is listed for the 2025 Chevrolet Suburban — GM GENUINE 12569638.