28 Engine parts are listed for the 2024 GMC Sierra 3500, in 13 part types, covering both the 6.6L V8 and the 6.6L V8 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The engine on the 2024 GMC Sierra 3500 covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Camshaft Bearing (6 parts), Crankshaft Seal (5 parts) and Camshaft (4 parts). The other 10 part types cover the remaining 13 parts.
The 2024 GMC Sierra 3500 was sold with both the 6.6L V8 and the 6.6L V8 DIESEL Turbocharged. 1 part fits every engine; the other 27 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2024 GMC Sierra 3500 engine parts are GM GENUINE (20 parts), MELLING (2 parts) and VICTOR REINZ (2 parts), plus 4 more brands.
1 part on this 2024 GMC Sierra 3500 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — GM GENUINE 97209342 (Crankshaft Seal). Click any part number to see every vehicle that part fits.
Camshaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 | 12742436 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GM GENUINE Fits: 6.6L V8 | 12672469 | 🇺🇸 US 🇨🇦 CA | Exhaust Duration at .050 inch Lift: 338 DD | View on Amazon |
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12633925 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MELLING Fits: 6.6L V8 | MC1432 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the camshafts that open the valves.
4 Camshaft parts for the 2024 GMC Sierra 3500 come from 2 brands — GM GENUINE and MELLING.
Listed part numbers: GM GENUINE 12742436, GM GENUINE 12672469 and GM GENUINE 12633925, plus the other parts above.
Camshaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 | 19260877 | 🇺🇸 US 🇨🇦 CA | Thickness Diameter .0898-.0894Position # 1 and # 5 | View on Amazon |
| GM GENUINE Fits: 6.6L V8 | 19260878 | 🇺🇸 US 🇨🇦 CA | Thickness Diameter .082-.0798Position 2 and 4 | View on Amazon |
| GM GENUINE Fits: 6.6L V8 | 19260879 | 🇺🇸 US 🇨🇦 CA | THK DIA .0703-.0699Position 3 | View on Amazon |
| GM GENUINE Fits: 6.6L V8 | 12679049 | 🇺🇸 US 🇨🇦 CA | Position # 4(V6) or Position # 5 | View on Amazon |
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12631285 | 🇺🇸 US 🇨🇦 CA | POSITION 1BEARING IS UNFINISHED REQUIRES LINE BORING | View on Amazon |
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12631286 | 🇺🇸 US 🇨🇦 CA | Position 2, 3, 4, 5Bearing is Unfinished Requires Line Boring | View on Amazon |
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.
6 Camshaft Bearing parts for the 2024 GMC Sierra 3500 come from GM GENUINE.
This group includes GM GENUINE 19260877, GM GENUINE 19260878 and GM GENUINE 19260879 and the remaining parts above.
Camshaft Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 | 11561455 | 🇺🇸 US 🇨🇦 CA | M8X1.25X15 or M6 X 1.0 X 15.5Retainer Bolt | View on Amazon |
This table covers the Camshaft bolts.
One part is listed for the 2024 GMC Sierra 3500 — GM GENUINE 11561455.
Camshaft Dowel Pin
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 | 24575061 | 🇺🇸 US 🇨🇦 CA | Outside Diameter (In): 0.185 In | View on Amazon |
This table covers the Camshaft Dowel pins.
This group shows a single part: GM GENUINE 24575061.
Camshaft Retainer / Thrust Plate
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2024 Sierra 3500 engines | 45745 | 🇺🇸 US 🇨🇦 CA | Kit | View on Amazon |
| FEL-PRO Fits: 6.6L V8 | ES73115 | 🇺🇸 US 🇨🇦 CA | Camshaft retainer plate & mounting bolts includedComplete Set | View on Amazon |
| GM GENUINE Fits: 6.6L V8 | 12589016 | 🇺🇸 US 🇨🇦 CA | Includes Seal | View on Amazon |
| MELLING Fits: 6.6L V8 | MF127 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
4 Camshaft Retainer / Thrust Plate parts are listed for the 2024 GMC Sierra 3500, from DORMAN, FEL-PRO, GM GENUINE and 1 other brand. 1 part fits every engine; the other 3 are engine-specific.
This group includes DORMAN 45745, FEL-PRO ES73115 and GM GENUINE 12589016 and the remaining parts above.
Camshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA Fits: 6.6L V8 | 01713900 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
One part is listed for the 2024 GMC Sierra 3500 — AJUSA 01713900.
Connecting Rod
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12683616 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the connecting rods between each piston and the crankshaft.
This group shows a single part: GM GENUINE 12683616.
Connecting Rod Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12685817 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
This group shows a single part: GM GENUINE 12685817.
Crankshaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12677566 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the crankshafts that turn piston motion into rotation.
This group shows a single part: GM GENUINE 12677566.
Crankshaft Main Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12704537 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
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.
One part is listed for the 2024 GMC Sierra 3500 — GM GENUINE 12704537.
Crankshaft Main Bearing Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 12686745 | 🇺🇸 US 🇨🇦 CA | SET INCLUDES 5 CAPS | View on Amazon |
This table covers the Crankshaft Main Bearing 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.
One part is listed for the 2024 GMC Sierra 3500 — GM GENUINE 12686745.
Crankshaft Main Bearing Cap Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 11610683 | 🇺🇸 US 🇨🇦 CA | Use with SEALANT 12346004 | View on Amazon |
This table covers the Crankshaft Main Bearing Cap bolts.
This group shows a single part: GM GENUINE 11610683.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular Fits: 6.6L V8 DIESEL Turbocharged | 97209342 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| GM GENUINE Fits: 6.6L V8 DIESEL Turbocharged | 29606 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| MAHLE / CLEVITE Fits: 6.6L V8 DIESEL Turbocharged | 67777 | 🇺🇸 US 🇨🇦 CA | Fluoroelastomer | View on Amazon |
| VICTOR REINZ Fits: 6.6L V8 DIESEL Turbocharged | 191018601 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
| VICTOR REINZ Fits: 6.6L V8 DIESEL Turbocharged | 811040210 | 🇺🇸 US 🇨🇦 CA | Material: Rubber | View on Amazon |
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.
5 Crankshaft Seal parts are listed for the 2024 GMC Sierra 3500, from GM GENUINE, VICTOR REINZ and MAHLE / CLEVITE. GM GENUINE 97209342 carries the "Popular" badge.
Part numbers include GM GENUINE 97209342, GM GENUINE 29606 and MAHLE / CLEVITE 67777, among others listed above.
Buying Engine Parts for a 2024 GMC Sierra 3500
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Match the engine first. Some engine parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Camshaft Bearing and Crankshaft Seal .
Frequently Asked Questions
How many engine parts fit the 2024 GMC Sierra 3500?
Our catalog currently lists 28 engine parts for the 2024 GMC Sierra 3500 across 13 subcategories and 7 brands, covering both the 6.6L V8 and the 6.6L V8 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.
Do engine parts differ between 2024 GMC Sierra 3500 engines?
Some do. 1 part fits every engine; the other 27 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of engine problems on a 2024 GMC Sierra 3500?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2024 GMC Sierra 3500 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2024 GMC Sierra 3500?
First match the engine — each row shows which engine(s) the part fits. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2024 GMC Sierra 3500
Engine Parts for Other GMC Sierra 3500 Years
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