2019 Buick Lacrosse Engine Parts

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

GM GENUINE supplies the 5 Camshaft parts for the 2019 Buick Lacrosse.

This group includes GM GENUINE 12677826, GM GENUINE 12677832 and GM GENUINE 12677833 and the remaining parts above.

This table covers the Camshaft Alignment tools. This is a service tool, not a wear part — match the application in the notes. Read more

This group shows a single part: LISLE 37530.

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

This group shows a single part: GM GENUINE 12636316.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12647161.

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 are listed for the 2019 Buick Lacrosse, from GM GENUINE and MAHLE / CLEVITE.

This group includes GM GENUINE 12672032, GM GENUINE 19368257 and MAHLE / CLEVITE CB2033A.

This table covers the Connecting Rod bolts. Read more

This group shows a single part: GM GENUINE 11519680.

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

One part is listed for the 2019 Buick Lacrosse — AJUSA 54323100.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12699162.

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

2 Crankshaft Main Bearing parts for the 2019 Buick Lacrosse come from GM GENUINE.

This group includes GM GENUINE 12744917 and GM GENUINE 19368254.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 11589001.

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

3 Crankshaft Repair Sleeve parts for the 2019 Buick Lacrosse come from 3 brands — BCA, NATIONAL and WJB / INMOTION PARTS.

This group includes BCA NS99166, NATIONAL 99166 and WJB / INMOTION PARTS WS99166.

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 2019 Buick Lacrosse come from 3 brands — NATIONAL, WJB / INMOTION PARTS and GM GENUINE. The "Popular" part is NATIONAL 710674.

Listed part numbers: NATIONAL 710674, GM GENUINE 12654010 and NATIONAL 710855, plus the other parts above.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12570326.

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

4 Cylinder Head Bolt parts are listed for the 2019 Buick Lacrosse, from GM GENUINE, AJUSA and FEL-PRO.

Listed part numbers: AJUSA 81082800, FEL-PRO ES73486 and GM GENUINE 11547020, plus the other parts 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

10 Cylinder Head Gasket parts are listed for the 2019 Buick Lacrosse, from GM GENUINE, AJUSA, APEX and 2 other brands. GM GENUINE 12647574 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

2 Cylinder Head Gasket Set parts are listed for the 2019 Buick Lacrosse, from AJUSA and MAHLE / CLEVITE.

Part numbers include AJUSA 52613900 and MAHLE / CLEVITE HS55390.

This table covers the Engine Block drain plugs. Read more

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 11546667.

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

3 Engine Block Heater parts for the 2019 Buick Lacrosse come from 2 brands — KAT'S HEATERS and GM GENUINE.

This group includes GM GENUINE 12587380, KAT'S HEATERS 28811 and KAT'S HEATERS 11811.

This table covers the Engine covers. Read more

TECHPRO supplies the 3 Engine Cover parts for the 2019 Buick Lacrosse.

Part numbers include TECHPRO GM1228208, TECHPRO GM1228209 and TECHPRO GM1228162.

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

One part is listed for the 2019 Buick Lacrosse — AJUSA 50552200.

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

4 Exhaust Valve parts for the 2019 Buick Lacrosse come from 4 brands — GM GENUINE, MELLING, QUALCAST and 1 other brand.

Listed part numbers: GM GENUINE 12647868, MELLING V3468 and QUALCAST 1013468, plus the other 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 2019 Buick Lacrosse, from GM GENUINE and WELLS.

Listed part numbers: GM GENUINE 12718357 and WELLS 5T5013.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12700427.

This table covers the Harmonic Balancer bolts. Read more

This group shows a single part: GM GENUINE 11546516.

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

This group shows a single part: GM GENUINE 12674126.

This table covers the Intake Manifold bolts. Read more

GM GENUINE supplies both parts for the 2019 Buick Lacrosse.

Listed part numbers: GM GENUINE 11547321 and GM GENUINE 11547030.

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

5 Intake Manifold Gasket parts are listed for the 2019 Buick Lacrosse, from GM GENUINE, APEX, ELRING and 2 other brands. GM GENUINE 12648665 carries the "Popular" badge.

Part numbers include GM GENUINE 12648665, APEX AMS13660 and ELRING 048550, among others listed above.

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

4 Intake Valve parts for the 2019 Buick Lacrosse come from 4 brands — GM GENUINE, MELLING, QUALCAST and 1 other brand.

This group includes GM GENUINE 12647867, MELLING V3467 and QUALCAST 1013467 and the remaining parts 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

4 Motor Mount parts for the 2019 Buick Lacrosse come from 2 brands — DEA / MARMON RIDE CONTROL and GM GENUINE.

Part numbers include DEA / MARMON RIDE CONTROL A20231, DEA / MARMON RIDE CONTROL A20238 and GM GENUINE 84080170, among others listed above.

This table covers the Motor Mount bolts. Read more

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 11547918.

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

23 Oil parts for the 2019 Buick Lacrosse come from 6 brands — VALVOLINE, MOBIL, LIQUI MOLY and 3 other brands. The "Popular" part is ACDELCO 109324.

The Full Synthetic section lists 19 options from VALVOLINE, LIQUI MOLY, MOBIL and 3 other brands — full-synthetic oils. ACDELCO 109324 is listed in this group.

In the High Mileage (>75,000 Miles) grade, MOBIL and VALVOLINE supply 4 parts: oils grouped for high-mileage engines. A representative part number is MOBIL 123842.

This table covers the Oil Cooler Mounting kits. Read more

HAYDEN supplies both parts for the 2019 Buick Lacrosse.

Listed part numbers: HAYDEN 238 and HAYDEN 153.

This table covers the Oil Dipstick tubes. Read more

2 Oil Dipstick / Tube parts for the 2019 Buick Lacrosse come from GM GENUINE.

This group includes GM GENUINE 12664600 and GM GENUINE 12672634.

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 are listed for the 2019 Buick Lacrosse, from FEL-PRO and GM GENUINE.

Part numbers include FEL-PRO 73889 and GM GENUINE 24504031.

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

3 Oil Drain Plug parts for the 2019 Buick Lacrosse come from 2 brands — DORMAN and GM GENUINE.

This group includes DORMAN 090948CD, DORMAN 090948 and GM GENUINE 55577568.

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

9 Oil Drain Plug Gasket parts are listed for the 2019 Buick Lacrosse, from FEL-PRO, DORMAN, GM GENUINE and 4 other brands. FEL-PRO 70820 carries the "Popular" badge.

This group includes FEL-PRO 70820, GM GENUINE 12616850 and AJUSA 01288800 and the remaining parts above.

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

4 Oil Filler Cap parts for the 2019 Buick Lacrosse come from 4 brands — ACDELCO, CALORSTAT, DORMAN and 1 other brand.

This group includes ACDELCO FC279, CALORSTAT OC2314 and DORMAN 90202 and the remaining parts 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

2 Oil Filler Cap Gasket parts are listed for the 2019 Buick Lacrosse, from FEL-PRO and GM GENUINE.

Listed part numbers: FEL-PRO 73193 and GM GENUINE 24100002.

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

13 Oil Filter parts for the 2019 Buick Lacrosse come from 13 brands — CHAMP / LUBER-FINER, FRAM, FVP and 10 other brands. The "Popular" part is MOBIL M1212A.

The Economy section lists 6 options from CHAMP / LUBER-FINER, FRAM, FVP and 3 other brands — the catalog's value-priced group. CHAMP / LUBER-FINER PH1500 is listed in this group.

The High Performance / Heavy Duty section lists 1 option from MOBIL — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. MOBIL M1212A is listed in this group.

In the Standard Replacement grade, BOSCH, MOTORCRAFT, ACDELCO and 3 other brands supply 6 parts: built to original-equipment specification. A representative part number is BOSCH 3502.

This table covers the Oil Filter Remote Mounting kits. Read more

One part is listed for the 2019 Buick Lacrosse — HAYDEN 292.

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

2 Oil Galley Plug parts for the 2019 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 11562126 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

2 Oil Level Sensor parts for the 2019 Buick Lacrosse come from 2 brands — GM GENUINE and WELLS.

This group includes GM GENUINE 12696433 and WELLS 5S15947.

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

4 Oil Pan parts are listed for the 2019 Buick Lacrosse, from DORMAN, GM GENUINE, SKP and 1 other brand.

This group includes DORMAN 264884, GM GENUINE 12647615 and SKP SK264884 and the remaining parts above.

This table covers the Oil Pan bolts. Read more

This group shows a single part: GM GENUINE 11588726.

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 2019 Buick Lacrosse come from 2 brands — GM GENUINE and VICTOR REINZ.

Part numbers include GM GENUINE 12647081 and VICTOR REINZ 703141410.

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

This group shows a single part: GM GENUINE 12741263.

This table covers the chains that drive the oil pump. Read more

2 Oil Pump Chain parts are listed for the 2019 Buick Lacrosse, from CLOYES and S.A. GEAR.

Listed part numbers: CLOYES C952 and S.A. GEAR C1135.

This table covers the Oil Pump Chain tensioners. 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

2 Oil Pump Chain Tensioner parts for the 2019 Buick Lacrosse come from 2 brands — CLOYES and S.A. GEAR.

This group includes CLOYES 96040 and S.A. GEAR 91270.

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

2 Oil Pump Control Valve / Solenoid parts are listed for the 2019 Buick Lacrosse, from GM GENUINE and STANDARD MOTOR PRODUCTS.

This group includes GM GENUINE 12741262 and STANDARD MOTOR PRODUCTS OPS404.

This table covers the gaskets that seal the Oil Pump Pickup Tube. 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 Pickup Tube Gasket parts are listed for the 2019 Buick Lacrosse, from FEL-PRO and GM GENUINE.

Part numbers include FEL-PRO 73744 and GM GENUINE 12637179.

This table covers the Oil Pump sprockets. Read more

4 Oil Pump Sprocket parts are listed for the 2019 Buick Lacrosse, from CLOYES, GM GENUINE and S.A. GEAR.

This group includes CLOYES S1122, CLOYES S1121 and GM GENUINE 12669395 and the remaining parts above.

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 2019 Buick Lacrosse.

Listed part numbers: GM GENUINE 12674055 and GM GENUINE 12674056.

This table covers the Piston Pin retainers. Read more

This group shows a single part: GM GENUINE 12647160.

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

5 Piston Ring parts are listed for the 2019 Buick Lacrosse, from GM GENUINE and HASTINGS MANUFACTURING.

This group includes GM GENUINE 12664455, GM GENUINE 12664461 and GM GENUINE 12664463 and the remaining parts above.

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

3 Rocker Arm parts for the 2019 Buick Lacrosse come from GM GENUINE.

This group includes GM GENUINE 12654646, GM GENUINE 12693909 and GM GENUINE 12666601.

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

4 Timing Chain parts are listed for the 2019 Buick Lacrosse, from GM GENUINE, CLOYES and S.A. GEAR.

Listed part numbers: CLOYES C951, GM GENUINE 12694716 and GM GENUINE 12647895, plus the other parts above.

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

8 Timing Chain & Component Kit parts for the 2019 Buick Lacrosse come from 4 brands — S.A. GEAR, CLOYES, ULTRA-POWER and 1 other brand. The "Popular" part is CLOYES 90951S.

The Economy section: 5 options from S.A. GEAR and ULTRA-POWER. S.A. GEAR 76369T is listed in this group.

Standard Replacement: 3 parts, from CLOYES and GM GENUINE. A representative part number is CLOYES 90951S.

This group includes CLOYES 90951S, S.A. GEAR 76369T and S.A. GEAR 76369S and the remaining parts above.

This table covers the guides and dampers that keep the timing chain on its path. Read more

8 Timing Chain Guide / Damper parts are listed for the 2019 Buick Lacrosse, from S.A. GEAR and CLOYES. S.A. GEAR 91273 carries the "Popular" badge.

Part numbers include S.A. GEAR 91273, S.A. GEAR 71205 and CLOYES 96044, among others listed above.

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

7 Timing Chain Tensioner parts for the 2019 Buick Lacrosse come from 3 brands — GM GENUINE, CLOYES and S.A. GEAR. The "Popular" part is GM GENUINE 12713641.

Listed part numbers: GM GENUINE 12713641, GM GENUINE 12713640 and CLOYES 96039, plus the other parts above.

This table covers the Timing covers. Read more

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12729377.

This table covers the Timing Cover bolts. Read more

This group shows a single part: GM GENUINE 11548171.

This table covers the gaskets that seal the Timing Cover. 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 Timing Cover Gasket parts for the 2019 Buick Lacrosse come from GM GENUINE.

This group includes GM GENUINE 12647891 and GM GENUINE 12647888.

This table covers the seals at the Timing Cover. 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: SCHAEFFLER SS6606.

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

2 Timing Crank Sprocket parts for the 2019 Buick Lacrosse come from 2 brands — CLOYES and S.A. GEAR.

This group includes CLOYES S1120 and S.A. GEAR S1415.

This table covers the Valve covers. Read more

GM GENUINE supplies both parts for the 2019 Buick Lacrosse.

Listed part numbers: GM GENUINE 12714147 and GM GENUINE 12714148.

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 2019 Buick Lacrosse — 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

5 Valve Cover Gasket parts for the 2019 Buick Lacrosse come from 3 brands — GM GENUINE, AJUSA and MAHLE / CLEVITE. The "Popular" part is GM GENUINE 12649906.

Listed part numbers: GM GENUINE 12649906, AJUSA 56089000 and AJUSA 56089100, plus the other parts above.

This table covers the Valve Cover washers. Read more

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12654651.

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

7 Valve Lifter parts for the 2019 Buick Lacrosse come from 6 brands — GM GENUINE, MELLING, AJUSA and 3 other brands. The "Popular" part is GM GENUINE HL129.

This group includes GM GENUINE HL129, MELLING JB7524 and AJUSA 85018700 and the remaining parts above.

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

4 Valve Spring parts are listed for the 2019 Buick Lacrosse, from QUALCAST, MELLING and SBI.

Listed part numbers: MELLING VS1700, QUALCAST 325001 and QUALCAST 326700, plus the other parts above.

This table covers the Valve Spring retainers. Read more

One part is listed for the 2019 Buick Lacrosse — MELLING VSR723.

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

3 Valve Spring Retainer Keeper parts are listed for the 2019 Buick Lacrosse, from MELLING, QUALCAST and SBI.

This group includes MELLING VL1098, QUALCAST 345021 and SBI 1211098.