2018 GMC Sierra 1500 Engine Parts

This table covers the Balance shafts. Read more

This group shows a single part: GM GENUINE 12653449.

This table covers the Balance Shaft 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 Balance Shaft Bearing parts for the 2018 GMC Sierra 1500 come from GM GENUINE.

This group includes GM GENUINE 12629467 and GM GENUINE 12629468.

This table covers the chains that drive the balance shafts. Read more

7 Balance Shaft Chain parts are listed for the 2018 GMC Sierra 1500, from S.A. GEAR, CLOYES, GM GENUINE and 1 other brand. CLOYES C927 carries the "Popular" badge.

This group includes CLOYES C927, GM GENUINE 12632727 and MELLING 1089 and the remaining parts above.

This table covers the guides that keep the balance-shaft chain on its path. Read more

3 Balance Shaft Chain Guide parts are listed for the 2018 GMC Sierra 1500, from CLOYES, GM GENUINE and S.A. GEAR.

Listed part numbers: CLOYES 95976, GM GENUINE 12632728 and S.A. GEAR 71285.

This table covers the Balance Shaft sprockets. Read more

4 Balance Shaft Sprocket parts are listed for the 2018 GMC Sierra 1500, from GM GENUINE, CLOYES and S.A. GEAR.

This group includes CLOYES S1110, GM GENUINE 12690616 and GM GENUINE 12632725 and the remaining parts above.

This table covers the Barometric 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 2018 GMC Sierra 1500 — GM GENUINE 12711681.

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

18 Camshaft parts are listed for the 2018 GMC Sierra 1500, from MELLING, ENGINETECH, GM GENUINE and 1 other brand. GM GENUINE 12619823 carries the "Popular" badge.

In the Heavy Duty / Towing grade, MELLING supplies 1 part: grouped under the catalog's "Heavy Duty / Towing" designation — the notes column spells out what sets them apart. A representative part number is MELLING 22142.

In the High Performance grade, MELLING supplies 6 parts: engineered beyond original-equipment specification. A representative part number is MELLING 22242.

The Standard Replacement section lists 6 options from MELLING, ENGINETECH, GM GENUINE and 1 other brand — built to original-equipment specification. GM GENUINE 12619823 is listed in this group.

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

This table covers the Camshaft & Lifter kits. Read more

One part is listed for the 2018 GMC Sierra 1500 — MELLING CLMC1423.

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

8 Camshaft Bearing parts are listed for the 2018 GMC Sierra 1500, from DURA-BOND, ENGINETECH, GM GENUINE and 2 other brands. DURA-BOND CH25 carries the "Popular" badge.

Listed part numbers: DURA-BOND CH25, GM GENUINE 12686894 and DURA-BOND CHP25, plus the other parts above.

This table covers the Camshaft bolts. Read more

This group shows a single part: ELRING 857390.

This table covers the Camshaft Dowel pins. Read more

One part is listed for the 2018 GMC Sierra 1500 — 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

7 Camshaft Retainer / Thrust Plate parts for the 2018 GMC Sierra 1500 come from 6 brands — APEX, FEL-PRO, MELLING and 3 other brands. The "Popular" part is FEL-PRO ES73115.

This group includes FEL-PRO ES73115, MELLING MF127 and APEX AES319 and the remaining parts above.

This table covers the seals at each camshaft end. 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 Camshaft Seal parts for the 2018 GMC Sierra 1500 come from 2 brands — MAHLE / CLEVITE and VICTOR REINZ.

This group includes MAHLE / CLEVITE B32270 and VICTOR REINZ 711836900.

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

GM GENUINE supplies both parts for the 2018 GMC Sierra 1500.

This group includes GM GENUINE 12648238 and GM GENUINE 12649190.

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

23 Connecting Rod Bearing parts are listed for the 2018 GMC Sierra 1500, from MAHLE / CLEVITE, ENGINETECH, GM GENUINE and 1 other brand. ENGINETECH BB253J carries the "Popular" badge.

High Performance: 11 parts, from MAHLE / CLEVITE. A representative part number is MAHLE / CLEVITE CB663HN.

The Standard Replacement section: 11 options from MAHLE / CLEVITE, ENGINETECH, SEALED POWER and 1 other brand. ENGINETECH BB253J is listed in this group.

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

This table covers the Connecting Rod bolts. Read more

This group shows a single part: GM GENUINE 11570662.

This table covers lower / conversion gasket sets for oil-pan and related joints. 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

7 Conversion / Lower Gasket Set parts are listed for the 2018 GMC Sierra 1500, from AJUSA, FEL-PRO, SKP and 3 other brands. FEL-PRO CS26744 carries the "Popular" badge.

Part numbers include FEL-PRO CS26744, SKP SKCS26744 and AJUSA 54323400, among others listed above.

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

One part is listed for the 2018 GMC Sierra 1500 — 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

5 Crankshaft Main Bearing parts for the 2018 GMC Sierra 1500 come from 3 brands — ENGINETECH, MAHLE / CLEVITE and GM GENUINE.

Part numbers include ENGINETECH BC623J, ENGINETECH BC500J and GM GENUINE 12729654, among others listed above.

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

GM GENUINE supplies the 3 Crankshaft Main Bearing Cap Bolt parts for the 2018 GMC Sierra 1500.

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

This table covers the sleeves used to restore a grooved crankshaft seal surface. Read more

7 Crankshaft Repair Sleeve parts for the 2018 GMC Sierra 1500 come from 3 brands — WJB / INMOTION PARTS, BCA and NATIONAL. The "Popular" part is WJB / INMOTION PARTS WS99215.

Listed part numbers: WJB / INMOTION PARTS WS99215, BCA NS99215 and BCA NS99452, plus the other parts above.

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

20 Crankshaft Seal parts for the 2018 GMC Sierra 1500 come from 12 brands — NATIONAL, APEX, FEL-PRO and 9 other brands. The "Popular" part is ACDELCO 100470.

This table covers the Crankshaft Seal covers. Read more

2 Crankshaft Seal Cover parts are listed for the 2018 GMC Sierra 1500, from DORMAN and GM GENUINE.

This group includes 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

One part is listed for the 2018 GMC Sierra 1500 — GM GENUINE 12627520.

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

2 Cylinder Deactivation Delete parts for the 2018 GMC Sierra 1500 come from MELLING.

Listed part numbers: MELLING MDK400 and MELLING MDK400HPT.

This table covers the Cylinder Deactivation Delete Block-Off 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

One part is listed for the 2018 GMC Sierra 1500 — MELLING MDKP1.

This table covers the Cylinder Deactivation 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

2 Cylinder Deactivation Solenoid parts for the 2018 GMC Sierra 1500 come from 2 brands — GM GENUINE and WELLS.

Listed part numbers: GM GENUINE 12697806 and WELLS 3N2004.

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

This group shows a single part: GM GENUINE 12677840.

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

4 Cylinder Head Alignment Dowel Pin parts are listed for the 2018 GMC Sierra 1500, from GM GENUINE and PIONEER.

This group includes GM GENUINE 12570326, GM GENUINE 90351710 and PIONEER S1115 and the remaining parts above.

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

9 Cylinder Head Bolt parts are listed for the 2018 GMC Sierra 1500, from GM GENUINE, FEL-PRO, MAHLE / CLEVITE and 3 other brands. GM GENUINE 11546959 carries the "Popular" badge.

Part numbers include GM GENUINE 11546959, AJUSA 81082900 and APEX AHB1351, among others listed above.

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

17 Cylinder Head Gasket parts are listed for the 2018 GMC Sierra 1500, from AJUSA, FEL-PRO, GM GENUINE and 6 other brands. APEX AHG1355 carries the "Popular" badge.

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

12 Cylinder Head Gasket Set parts are listed for the 2018 GMC Sierra 1500, from AJUSA, ENGINETECH, FEL-PRO and 5 other brands. GM GENUINE 12700996 carries the "Popular" badge.

This table covers the wear sleeves used to restore a Cylinder seal surface. Read more

2 Cylinder Repair Sleeve parts are listed for the 2018 GMC Sierra 1500, from ENGINETECH and MELLING.

This group includes ENGINETECH ESL173 and MELLING CSL355F.

This table covers the Engine Block drain plugs. Read more

GM GENUINE supplies both parts for the 2018 GMC Sierra 1500.

Part numbers include GM GENUINE 11602951 and GM GENUINE 11546667.

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

4 Engine Block Heater parts for the 2018 GMC Sierra 1500 come from 2 brands — KAT'S HEATERS and GM GENUINE.

Part numbers include GM GENUINE 12586687, KAT'S HEATERS 11626 and KAT'S HEATERS 28510, among others listed above.

This table covers the Engine covers. Read more

3 Engine Cover parts are listed for the 2018 GMC Sierra 1500, from TECHPRO and VARIOUS MFR.

Listed part numbers: TECHPRO GM1228194 and TECHPRO GM1228173, plus the other parts above.

This table covers the Engine Cover bolts. Read more

This group shows a single part: GM GENUINE 11611692.

This table covers the Engine Cover grommets. Read more

This group shows a single part: GM GENUINE 12594875.

This table covers full gasket kits covering the joints opened in an engine rebuild. 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

3 Engine Kit Gasket Set parts are listed for the 2018 GMC Sierra 1500, from AJUSA and FEL-PRO.

Listed part numbers: AJUSA 50552500, AJUSA 50552300 and FEL-PRO 2603198.

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

5 Exhaust Valve parts for the 2018 GMC Sierra 1500 come from 5 brands — GM GENUINE, ENGINETECH, MELLING and 2 other brands. The "Popular" part is GM GENUINE 12678745.

This group includes GM GENUINE 12678745 and ENGINETECH V3433 and the remaining parts above.

This table covers the followers that drive a mechanical fuel pump off the camshaft. Read more

2 Fuel Pump Camshaft Follower parts are listed for the 2018 GMC Sierra 1500, from STANDARD MOTOR PRODUCTS and WELLS.

This group includes STANDARD MOTOR PRODUCTS GDF103 and WELLS 5T5014.

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

4 Harmonic Balancer parts are listed for the 2018 GMC Sierra 1500, from ATP, DORMAN, GM GENUINE and 1 other brand.

Part numbers include ATP 102406, DORMAN 594716 and GM GENUINE 12684590, among others listed above.

This table covers the Harmonic Balancer bolts. Read more

2 Harmonic Balancer Bolt parts for the 2018 GMC Sierra 1500 come from 2 brands — FEL-PRO and GM GENUINE.

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

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

4 Intake Manifold parts for the 2018 GMC Sierra 1500 come from 2 brands — GM GENUINE and VAICO.

This group includes GM GENUINE 12815958, GM GENUINE 12748173 and GM GENUINE 12654946 and the remaining parts above.

This table covers the Intake Manifold bolts. Read more

GM GENUINE supplies both parts for the 2018 GMC Sierra 1500.

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

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

17 Intake Manifold Gasket parts are listed for the 2018 GMC Sierra 1500, from MAHLE / CLEVITE, FEL-PRO, APEX and 3 other brands. ENGINETECH IC293A carries the "Popular" badge.

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 for the 2018 GMC Sierra 1500 come from 5 brands — GM GENUINE, ENGINETECH, MELLING and 2 other brands. The "Popular" part is GM GENUINE 12619825.

Listed part numbers: GM GENUINE 12619825 and ENGINETECH V3432, plus the other parts above.