Engine Parts for 2026 GMC Sierra 2500 HD
No.
Part # / Description / Price
Price
1
Crankshaft Pulley 
GM
GM Notes: PARTS: Part has related component that cannot be reused/reinstalled; bolt.
Description: Genuine GM OEM Crankshaft Pulley (MPN: 12692644) for 6.6L diesel engines in Silverado and Sierra 2500 HD and 3500 HD trucks. This authentic General Motors crankshaft pulley is engineered to drive the engine accessory belt system, delivering reliable power ...
MSRP $52.44
$34.04
MSRP $52.44
$34.04
2
M10x1.5x49.8 Hex Head Bolt with Washer GM
GM Notes: PARTS: Part cannot be reused/reinstalled.
Description: Upgrade your 6.6L diesel engine with the genuine GM OEM M10x1.5x49.8 Hex Head Bolt with Washer (MPN: 11589168), engineered to secure critical upper engine components with factory-grade reliability. This authentic General Motors fastener is precision-manufa ...
MSRP $8.20
$4.89
MSRP $8.20
$4.89
3
Vibration Damper GM
GM Notes: PARTS: Part has related component that cannot be reused/reinstalled; bolt.
Description: Replace the vibration damper on your 2017-2019 Chevrolet Silverado or GMC Sierra equipped with a 6.6L diesel engine with this genuine GM OEM part (MPN: 12723412). This upper engine component reduces harmful vibrations and ensures smooth operation of critic ...
MSRP $169.57
$107.09
MSRP $169.57
$107.09
4
Engine Harmonic Balancer Bolt GM
GM Notes: PARTS: Part cannot be reused/reinstalled.
Description: Upgrade your diesel engine with the Genuine GM OEM Engine Harmonic Balancer Bolt (MPN: 97329601), specifically engineered for 6.6L diesel engines in select 2015-2019 GM trucks. This critical fastener secures upper engine components with precision-engineere ...
MSRP $22.85
$15.52
MSRP $22.85
$15.52
5
Crankshaft Balancer Washer GM
GM Description: Genuine GM OEM Crankshaft Balancer Washer (MPN: 97329602) engineered for 2015-2019 Duramax 6.6L diesel engines, this critical upper engine component maintains proper crankshaft alignment and reduces vibration during operation. Factory-original part backed ...
MSRP $60.39
$39.20
MSRP $60.39
$39.20
6
Cover GM
GM Description: Genuine GM OEM Cover (MPN: 12739836) designed for 6.6L diesel upper engine components on Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD trucks. This factory-original cover protects critical diesel engine components and maintains proper engine bay o ...
MSRP $153.21
$96.76
MSRP $153.21
$96.76
7
Crankshaft Front Oil Seal GM
GM Description: # Product Description
Upgrade your diesel engine's reliability with the Genuine GM OEM Crankshaft Front Oil Seal (MPN: 97209341), engineered specifically for 2015-2019 Chevrolet Silverado and GMC Sierra HD trucks with 6.6L Duramax diesel engines, as well ...
MSRP $71.22
$46.23
MSRP $71.22
$46.23
7
Rear Crankshaft Oil Seal GM
GM Positions: Rear
Description: Genuine GM OEM Rear Crankshaft Oil Seal (MPN: 97209342) engineered for Chevrolet Express, Savana, Silverado, and GMC Sierra 2500 HD/3500 HD models. This original equipment crankshaft seal prevents engine oil leaks by creating a tight, reliable barrier at b ...
MSRP $83.58
$54.26
MSRP $83.58
$54.26
8
Valve Cover GM
GM Positions: Left
Description: Genuine GM OEM Valve Cover (MPN: 12701129) for 6.6L Duramax diesel engines, designed to seal and protect upper engine components in Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD trucks. This left-side valve cover replacement part maintains proper ...
MSRP $115.57
$73.00
MSRP $115.57
$73.00
8
Valve Cover GM
GM Positions: Right
Description: Genuine GM OEM Valve Cover (MPN 12725771) for 6.6L Duramax diesel engines, designed for right-side installation on Silverado and Sierra 2500 HD and 3500 HD pickup trucks. This upper engine component seals the valve train while providing access for maintena ...
MSRP $111.65
$70.51
MSRP $111.65
$70.51
9
Valve Cover Gasket GM
GM Positions: Left
Description: Upgrade your diesel truck's engine sealing with the Genuine GM OEM Valve Cover Gasket (MPN: 12691860), engineered specifically for 2017-2019 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD models equipped with the 6.6L Duramax diesel engine. This au ...
MSRP $35.51
$23.05
MSRP $35.51
$23.05
10
Engine Crankcase Vent Valve GM
GM Description: # Engine Crankcase Vent Valve Description
Genuine GM OEM Engine Crankcase Vent Valve (MPN: 12739531) is a critical upper engine component designed to manage crankcase pressure and oil vapor separation in 6.6L diesel engines. This oil separator assembly wi ...
MSRP $149.56
$82.86
MSRP $149.56
$82.86
11
Engine Oil Filler Cap GM
GM Description: Keep your engine running smoothly with the Genuine GM OEM Engine Oil Filler Cap (MPN: 12677347), designed specifically for 2017-2019 Chevrolet Silverado and GMC Sierra heavy-duty trucks equipped with the 6.6L Duramax diesel engine. This authentic General M ...
MSRP $16.33
$9.73
MSRP $16.33
$9.73
12
Engine Oil Filler Cap O-Ring GM
GM Notes: PARTS: Part included with filler cap.
Description: The GM OEM Engine Oil Filler Cap O-Ring (MPN: 24100002) is a genuine General Motors replacement seal designed to maintain a secure, leak-free fit on your vehicle's oil filler cap. This authentic GM part ensures proper engine oil containment and prevents co ...
MSRP $6.01
$3.60
MSRP $6.01
$3.60
15
Intake Manifold GM
GM Description: Genuine GM OEM Intake Manifold (MPN: 12715992) for Silverado and Sierra 2500 HD and 3500 HD diesel trucks, engineered to optimize air intake and fuel mixture for peak engine performance. This upper intake manifold assembly features integrated sensor provis ...
MSRP $182.67
$114.03
MSRP $182.67
$114.03
16
F (S)Manifold GM
GM Positions: Right
Description: # Product Description
Upgrade your diesel engine performance with the Genuine GM OEM F Manifold (MPN: 12716585), the authentic right-side exhaust manifold designed for 2017-2019 Silverado and Sierra HD trucks equipped with the 6.6L diesel engine. This fac ...
MSRP $129.59
$81.84
MSRP $129.59
$81.84
16
F (S)Manifold GM
GM Positions: Left
Description: Upgrade your diesel engine's exhaust performance with this Genuine GM OEM F(S)Manifold (MPN: 12717925), engineered specifically for 2017-2019 Silverado and Sierra heavy-duty trucks equipped with 6.6L diesel engines. This left-side exhaust manifold is essen ...
MSRP $128.31
$81.04
MSRP $128.31
$81.04
17
Upper Intake Manifold Seal GM
GM Description: Genuine GM OEM Upper Intake Manifold Seal (MPN: 12642410) engineered for 2017-2019 Chevrolet Silverado and GMC Sierra heavy-duty diesel trucks, including 2500 HD and 3500 HD models equipped with 6.6L Duramax engines. This OEM replacement seal maintains pro ...
MSRP $12.09
$8.21
MSRP $12.09
$8.21