Before you order: GM part numbers change by option code and year. Confirm against your VIN with a GM dealer. Callout numbers on this page are our own and do not match GM's diagram numbers. Quantities are per vehicle (both sides).
Engine: this page covers the 2.4L 4-cylinder (LAF 2010-2011, LEA 2012-2017) only. For the 3.0L / 3.6L V6, see Engine Block V6. GM does not sell a bare 2.4L block on these diagrams. The piston oil nozzles (12641084) are on the Oil Pan 2.4L page; the timing chain, sprockets and balance shafts are on the Timing Chain 2.4L page. Standard sizes only are listed. The drawing is simplified and not to scale.
Engine: this page covers the 2.4L 4-cylinder (LAF 2010-2011, LEA 2012-2017) only. For the 3.0L / 3.6L V6, see Engine Block V6. GM does not sell a bare 2.4L block on these diagrams. The piston oil nozzles (12641084) are on the Oil Pan 2.4L page; the timing chain, sprockets and balance shafts are on the Timing Chain 2.4L page. Standard sizes only are listed. The drawing is simplified and not to scale.
| # | Part | GM OEM # | Fitment & notes | Buy |
|---|---|---|---|---|
| 1 | Crankshaft, engine | 12578164 | 2.4L (LAF 2010-2011, LEA 2012-2017). | Check price on Amazon |
| 2 | Bearing kit, crankshaft main (standard, full set) | 12591092 | 2.4L. Full set of upper and lower main bearing shells and thrust bearing. GM lists a separate kit (19301213) for export engines only. | Check price on Amazon |
| 3 | Bolt, lower crankcase (bedplate) M8x1.25x80.8 | 11588733 | 2.4L. Qty 10 per GM. | Check price on Amazon |
| 4 | Pin, lower crankcase & cylinder head locating | 12656680 current 90537102 superseded | 2.4L. GM uses the same dowel for the lower crankcase (qty 4) and the cylinder head (qty 2). 90537102 is replaced by 12656680. | Check price on Amazon |
| 5 | Seal, crankshaft rear oil | 12591866 | 2.4L. The V6 uses a different seal (12637710). | Check price on Amazon |
| 6 | Plate, automatic transmission flexible (flexplate) | 12647333 | 2.4L automatic. | Check price on Amazon |
| 7 | Bolt, flexplate (M10x1.25x18) | 90236536 | 2.4L. Qty 6. | Check price on Amazon |
| 8 | Pin, transmission locating (18.5 mm x 12 mm) | 90351708 | 2.4L. Qty 2. | Check price on Amazon |
| 9 | Rod, connecting (with bolts) | 12654958 | 2.4L. Qty 4. Includes the rod bolts (10). | Check price on Amazon |
| 10 | Bolt, connecting rod (M9x1x44) | 11570825 | 2.4L. Qty 8 (2 per rod). Part of rod (9). | Check price on Amazon |
| 11 | Bearing kit, connecting rod (standard, full set) | 12591093 | 2.4L LAF and LEA. GM lists 19300927 for export engines only. | Check price on Amazon |
| 12 | Piston kit (with pin and retainers) | 12646457 | 2.4L. Qty 4. GM: replace in a set of 4. Rings are sold separately (13). | Check price on Amazon |
| 13 | Ring kit, piston | 12665165 | 2.4L. Qty 4 (one kit per piston). GM lists 19300926 for export engines only. | Check price on Amazon |
| 14 | Retainer, piston pin | 90537376 | 2.4L. Part of piston kit (12). | Check price on Amazon |
| 15 | Bearing, balance shaft rear | 12581395 | 2.4L. Qty 2. The balance shafts themselves are on the Timing Chain 2.4L page. | Check price on Amazon |
| 16 | Sensor, crankshaft position | 19541730 current 12674703 superseded | 2.4L. 12674703 is replaced by 19541730. | Check price on Amazon |
| 17 | Ring, crankshaft position sensor reluctor (58 tooth) | 12578661 | 2.4L. | Check price on Amazon |
| 18 | Bolt, reluctor ring | 55585169 | 2.4L. Qty 3. | Check price on Amazon |
| 19 | Sensor, knock | 12729597 2011-2017 19434675 2010 (current) 12621820 2010 (superseded) | 2.4L. The 2010 diagram lists 12621820 (replaced by 19434675); 2012-2017 diagrams list 12729597. Check your VIN for 2011. | Check price on Amazon |
| 20 | Plug, engine block oil gallery (M16x1.5, with washer) | 11588949 | 2.4L. Qty 2. | Check price on Amazon |
| 21 | Plug, engine block core hole (M14x1.5x16) | 11561583 | 2.4L and V6. Qty 4 per GM. | Check price on Amazon |
| 22 | Plug, engine block oil gallery (M20x1.5x30.5) | 11561751 | 2.4L and V6. | Check price on Amazon |
| 23 | Plug, engine block oil gallery (cup type, 13 mm) | 21000867 | 2.4L. Qty 2. | Check price on Amazon |
| 24 | Pin, engine front cover & oil pan locating (8x12 mm dowel) | 22531637 | 2.4L and V6. Qty 2. | Check price on Amazon |
The illustration is an original drawing made for this site. It is not to scale and the shapes are representative.