Engine for 2003 GMC Sierra 2500 HD
No.
Part # / Description / Price
Price
N/A
Cylinder Head Gasket 
GM
GM Description: Upgrade your GM vehicle with the Genuine OEM Cylinder Head Gasket (MPN: 12589227), engineered to factory specifications for reliable sealing between the cylinder head and engine block. This authentic General Motors part delivers superior performance across ...
MSRP $101.48
$64.10
MSRP $101.48
$64.10
N/A
Engine Mount GM
GM Description: Upgrade your vehicle's engine stability with the Genuine GM OEM Engine Mount (MPN: 25828247), a factory-engineered component designed to reduce vibration and secure your engine to the frame. This authentic General Motors engine mount is precision-tested to ...
MSRP $233.09
$145.48
MSRP $233.09
$145.48
N/A
Engine Oil Cooler GM
GM Description: All models. 6.0l. 4.8, 5.3 & 6.0L, 6.0L. Hummer H2. Helps maintain proper engine oil operating temperatures
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
N/A
Engine Cylinder Head Gasket Kit with Gaskets and Seals GM
GM Description: All models. 6.0l. Without cyl head bolts. Silverado, sierra. 6.0l, 6.2l. Exc.Head Bolts. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
1
LQ9 Standard Cylinder Head GM
GM Description: The LQ9 Standard Cylinder Head (MPN: 12562319) is a genuine GM OEM engine component engineered for 6.0L gasoline engines across select GM full-size vans, SUVs, and trucks. This factory replacement cylinder head is designed to restore proper engine performa ...
MSRP $327.17
$204.21
MSRP $327.17
$204.21
3
Driver Side Rocker Arm Cover GM
GM Description: The Driver Side Rocker Arm Cover (MPN: 12570427) is a genuine GM OEM engine component engineered to protect valve train components on select GM vehicles. This factory-original rocker arm cover meets General Motors' strict manufacturing and performance spec ...
MSRP $228.13
$142.38
MSRP $228.13
$142.38
3
Passenger Side Rocker Arm Cover GM
GM Description: Upgrade your engine with the Genuine GM OEM Passenger Side Rocker Arm Cover (MPN: 12582224), engineered to factory specifications for select GM vehicles. This authentic General Motors rocker arm cover seals and protects critical valve train components, ens ...
MSRP $172.72
$109.08
MSRP $172.72
$109.08
4
Valve Cover Gasket GM
GM Description: Upgrade your engine's sealing performance with the GM Genuine OEM Valve Cover Gasket (MPN: 12637683), engineered to prevent oil leaks and maintain optimal engine compression across select GM vehicles. This authentic General Motors replacement gasket is pre ...
MSRP $40.93
$26.57
MSRP $40.93
$26.57
5
Intake Valve GM
GM Description: # Genuine GM OEM Intake Valve
The Genuine GM OEM Intake Valve (MPN: 12563063) is a critical engine component that regulates the flow of air and fuel mixture into the combustion chamber, ensuring optimal engine performance and efficiency. This authentic Ge ...
MSRP $42.24
$27.42
MSRP $42.24
$27.42
6
Exhaust Valve GM
GM Description: GM Genuine OEM Exhaust Valve MPN 12694167 is engineered to meet factory specifications for proper engine exhaust flow and performance on select GM vehicles. This authentic General Motors replacement part ensures reliable valve operation and helps maintain ...
MSRP $51.01
$33.11
MSRP $51.01
$33.11
7
Valve Seals GM
GM Description: # Valve Seals - MPN 12482063
Genuine GM OEM valve seals (MPN 12482063) are precision-engineered components designed to prevent oil leakage from the valve guide area in your engine. These factory-original seals maintain proper oil control and engine perfor ...
MSRP $64.69
$41.99
MSRP $64.69
$41.99
7
Valve Seals GM
GM Description: # Genuine GM OEM Valve Seals (MPN: 12482062)
Genuine GM OEM valve seals part number 12482062 are precision-engineered components designed to prevent oil leakage past valve stems in your engine's cylinder head. These critical seals maintain proper oil cont ...
MSRP $70.92
$46.05
MSRP $70.92
$46.05
8
Valve Spring GM
GM Description: Upgrade your engine performance with the Genuine GM OEM Valve Spring (MPN: 12706568), engineered to meet General Motors' exacting quality standards. This authentic replacement valve spring is designed for select GM vehicles and ensures optimal valve timing ...
MSRP $7.93
$5.39
MSRP $7.93
$5.39
9
Valve Spring Cap GM
GM Description: # Valve Spring Cap - GM OEM Part 10166344
Engineered by General Motors, the OEM Valve Spring Cap (MPN: 10166344) is a precision-manufactured engine component that maintains proper valve spring tension and alignment in select GM vehicles. This genuine GM p ...
MSRP $9.31
$6.32
MSRP $9.31
$6.32
10
Valve Locks GM
GM Description: GM Genuine Valve Locks (MPN: 10166345) are precision-engineered engine components designed to secure valve stems in place and maintain proper valve operation across select GM vehicles. These OEM valve locks are essential for preventing valve movement and e ...
MSRP $7.62
$5.17
MSRP $7.62
$5.17
11
Valve Rocker Arm GM
GM Description: The GM Genuine Valve Rocker Arm (MPN: 12681275) is an essential engine component engineered to precisely control valve operation in your Silverado, Sierra, and Suburban 3500HD. This authentic OEM part delivers reliable performance through GM's rigorous des ...
MSRP $24.39
$16.57
MSRP $24.39
$16.57
12
LS-Series Steel Pushrod GM
GM Description: The GM OEM LS-Series Steel Pushrod (MPN: 10238852) is engineered to meet General Motors' exacting performance standards for valve train operation. This genuine GM pushrod delivers reliable valve actuation in LS-engine applications, ensuring precise engine ...
MSRP $31.67
$21.53
MSRP $31.67
$21.53
13
Engine Hydraulic Valve Adjuster/Valve Lifter GM
GM Description: # Product Description
The GM OEM Engine Hydraulic Valve Adjuster/Valve Lifter (MPN: 17122490) is a genuine factory component engineered to maintain precise valve clearance and optimize your engine's performance and efficiency. This critical hydraulic valv ...
MSRP $56.97
$36.98
MSRP $56.97
$36.98
14
LS1/LQ9 Stock Camshaft GM
GM Description: Upgrade your LS1 or LQ9 engine with the genuine GM OEM camshaft (MPN: 12561721), the factory-engineered component that controls valve timing and lift for optimal performance. This stock camshaft is engineered to meet General Motors' rigorous standards and ...
MSRP $836.81
$519.92
MSRP $836.81
$519.92
15
Engine Camshaft Bearing GM
GM Description: Express, savana. All models. 5.7l. Corvette. No.2, no.4. Position-2,4. 1st Design. Engine Block Camshaft Hole is 58.90mm. Hummer H2. GTO.
16
Engine Front Cover Seal GM
GM Description: The GM Genuine Engine Front Cover Seal (MPN: 12585673) is an original equipment replacement part engineered to maintain proper sealing and prevent fluid leaks from the engine front cover assembly on select GM vehicles. This OEM part is manufactured to Gene ...
MSRP $44.32
$28.77
MSRP $44.32
$28.77
17
Gasket GM
GM Description: # Product Description
Genuine GM OEM Gasket MPN 12735382 is engineered to seal critical engine components and prevent fluid leakage on select GM vehicles. This authentic General Motors gasket delivers factory-grade performance and durability for reliable ...
MSRP $53.97
$35.04
MSRP $53.97
$35.04
18
Timing Cover GM
GM Description: Protect your engine's timing system with the Genuine GM OEM Timing Cover (MPN: 12633906), engineered for optimal performance across select GM performance and luxury vehicles. This essential engine component seals and protects critical timing chain componen ...
MSRP $193.06
$120.50
MSRP $193.06
$120.50
19
Camshaft Gear GM
GM Description: # GM OEM Camshaft Gear - MPN 12576407
Upgrade your engine performance with the genuine GM OEM Camshaft Gear (MPN: 12576407), a critical engine component designed to synchronize camshaft rotation and valve timing for optimal engine operation. This authenti ...
MSRP $59.89
$38.89
MSRP $59.89
$38.89
20
Timing Chain GM
GM Description: The GM OEM Timing Chain (MPN: 12646387) is a precision-engineered engine component designed to synchronize crankshaft and camshaft rotation, ensuring your engine's intake and exhaust valves operate at exactly the right moments for optimal performance. This ...
MSRP $110.91
$70.05
MSRP $110.91
$70.05
21
LQ9 Production Piston Ring Set GM
GM Notes: Includes: One Standard Ring Set For One Piston.
Description: The LQ9 Production Piston Ring Set (MPN: 88894243) is a genuine GM OEM engine component engineered for 6.0L engines with code U, including applications in the Hummer H2, Express, and Savana models. This critical piston ring set features a 1.5mm upper compr ...
MSRP $66.85
$43.41
MSRP $66.85
$43.41
23
Connecting Rod GM
GM Description: # SEO-Optimized Product Description
Upgrade your engine's performance with the Genuine GM OEM Connecting Rod (MPN: 12568734), engineered to meet General Motors' exacting standards. This critical engine component transfers motion from the piston to the cra ...
MSRP $146.33
$92.42
MSRP $146.33
$92.42
24
Bearing GM
GM Notes: Includes: One Standard Upper & Lower Bearing For One Rod.
Description: The Genuine GM OEM Bearing (MPN: 89017573) is a factory-original component engineered to deliver reliable performance and durability in select GM vehicles. This precision-manufactured bearing supports critical drivetrain and suspension operations, ensuring ...
MSRP $25.77
$17.51
MSRP $25.77
$17.51
25
Bearing GM
GM Notes: Includes: One Standard Upper & Lower Bearing.
Description: # GM OEM Bearing - MPN 89017571
Upgrade your vehicle's performance with the Genuine GM OEM Bearing (MPN: 89017571), engineered to deliver reliable support and smooth operation in critical drivetrain and suspension applications. This authentic General Moto ...
MSRP $94.76
$59.84
MSRP $94.76
$59.84
25
Engine Crankshaft Thrust Washer GM
GM Notes: Includes: One Standard Upper & Lower Bearing.
Description: # Engine Crankshaft Thrust Washer - GM OEM Part 89017572
The Genuine GM OEM Engine Crankshaft Thrust Washer (MPN: 89017572) is a critical internal engine component designed to manage crankshaft axial movement and reduce friction within the engine block. T ...
MSRP $85.41
$55.45
MSRP $85.41
$55.45
26
Engine Crankshaft GM
GM Description: Engine code u. All models. 6.0l. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
27
Crankshaft Rear Main Seal GM
GM Description: Genuine GM OEM Crankshaft Rear Main Seal (MPN: 89060436) is engineered to prevent oil leaks at the rear of your engine's crankshaft. This original equipment manufacturer part delivers reliable sealing performance on select GM vehicles, ensuring your engine ...
MSRP $42.81
$27.79
MSRP $42.81
$27.79
28
LS Rear Block Cover GM
GM Description: # Product Description
The GM Genuine LS Rear Block Cover (MPN: 12639250) is an authentic OEM engine component engineered to seal and protect the rear of LS-series engine blocks in select GM vehicles. This factory-original part maintains engine integrity a ...
MSRP $101.65
$64.20
MSRP $101.65
$64.20
29
Crankshaft Rear Oil Seal Housing Gasket GM
GM Description: # Crankshaft Rear Oil Seal Housing Gasket - GM OEM Part 12639249
The Crankshaft Rear Oil Seal Housing Gasket (MPN: 12639249) is a genuine GM OEM component engineered to seal the rear crankshaft housing and prevent oil leakage on select GM vehicles. This f ...
MSRP $65.37
$42.44
MSRP $65.37
$42.44
31
Engine Oil Pan GM
GM Description: The GM OEM Engine Oil Pan (MPN: 12579273) is a genuine factory replacement designed for Chevrolet Express, GMC Savana, and Hummer H2 models equipped with 6.0L engines. This essential engine component maintains proper oil circulation and storage while incor ...
MSRP $524.17
$327.16
MSRP $524.17
$327.16
32
Oil Pan Gasket GM
GM Description: # Oil Pan Gasket - MPN 12612350
The GM OEM Oil Pan Gasket (MPN: 12612350) is a factory-engineered engine sealing component that prevents oil leaks from the pan assembly on select GM vehicles. This genuine General Motors part maintains proper oil containme ...
MSRP $84.64
$54.95
MSRP $84.64
$54.95
33
Oil Pump GM
GM Description: Upgrade your vehicle's engine performance with the Genuine GM OEM Oil Pump (MPN: 12710303), engineered to meet General Motors' exacting quality standards. This essential engine component maintains proper oil circulation and pressure throughout your vehicle ...
MSRP $180.40
$112.56
MSRP $180.40
$112.56
34
Engine Oil Pump Pickup Tube GM
GM Description: This Genuine GM OEM Engine Oil Pump Pickup Tube (MPN: 12563961) is engineered to deliver consistent oil flow from the pan to your engine's oil pump, ensuring proper lubrication and engine protection. Designed for Express, Savana, and Hummer H2 models, this ...
MSRP $119.90
$75.72
MSRP $119.90
$75.72
35
Crankshaft Gear GM
GM Description: The Genuine GM OEM Crankshaft Gear (MPN: 12556582) is a critical engine component designed to synchronize crankshaft rotation and timing chain operation across select GM vehicles. This original equipment manufacturer part ensures precise valve timing and e ...
MSRP $54.15
$35.15
MSRP $54.15
$35.15