742+ 2003 Chevrolet Silverado 1500 HD Engine & Drivetrain Parts - Page 22

Engine & Drivetrain (742 products)

Cometic GM LS1 SB 4.130 inch Bore .098 inch MLS-5 Head Gasket

Cometic Gasket

Part # C5317-098

Fits All Trims

Cometic GM LS1 SB 4.130 inch Bore .098 inch MLS-5 Head Gasket

$143.45

King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 (Size 010) Main Bearing Set

King Engine Bearings

Part # MB5293SI010

Fits All Trims

King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 (Size 010) Main Bearing Set

$66.65

Cometic GM LS Gen-3/4 Small Block V8 .092in MLS Cylinder Head Gasket - 4.130in Bore

Cometic Gasket

Part # C5317-092

Fits All Trims

Cometic GM LS Gen-3/4 Small Block V8 .092in MLS Cylinder Head Gasket - 4.130in Bore

$143.45

USA Standard Ring & Pinion Gear Set For GM 9.5in in a 4.88 Ratio

Yukon Gear & Axle

Part # ZG GM9.5-488

Fits All Trims

USA Standard Ring & Pinion Gear Set For GM 9.5in in a 4.88 Ratio

$381.89

Cometic GM LS Gen-3/4 Small Block V8 .051in MLS Cylinder Head Gasket - 4.085in Bore - 1/2in Studs

Cometic Gasket

Part # C15508-051

Fits All Trims

Cometic GM LS Gen-3/4 Small Block V8 .051in MLS Cylinder Head Gasket - 4.085in Bore - 1/2in Studs

$97.74

MAHLE Original Buick Rainier 07-04 O-Ring

Victor Reinz

Part # 72141

Fits All Trims

MAHLE Original Buick Rainier 07-04 O-Ring

$13.68

Fel-Pro

Part # 70895

Fits All Trims

Fel-Pro Chevrolet Silverado 1500 70895 Exhaust Gas Recirculation (EGR) Valve Gasket

$1.52

Eaton

Part # 225C135A

Fits All Trims

Eaton Detroit Locker Differential 33 Spline 1.37in Axle Shaft Diameter Front 9.25in Rear 9.5in

$1310.08

Fel-Pro

Part # CS9284

Fits All Trims

Fel-Pro Chevrolet Silverado 1500 CS 9284 Engine Conversion Gasket Set

$174.14

Royal Purple

Part # 61320

Fits All Trims

Royal Purple Max ATF Automatic Transmission Fluid - 6 Gallon Bag-In-Box

$279.99

Yukon Gear Standard Open and Gov-Loc Cross Pin Bolt w/ M10X1.5 Thread For 9.5in and 9.25in GM IFS

Yukon Gear & Axle

Part # YSPBLT-063

Fits All Trims

Yukon Gear Standard Open and Gov-Loc Cross Pin Bolt w/ M10X1.5 Thread For 9.5in and 9.25in GM IFS

$24.89

Cometic GM LS Gen-3/4 Small Block V8 .040in MLX Cylinder Head Gasket - 4.150in Bore

Cometic Gasket

Part # C5014-040

Fits All Trims

Cometic GM LS Gen-3/4 Small Block V8 .040in MLX Cylinder Head Gasket - 4.150in Bore

$123.48

Cometic GM LS1 SB 4.060 inch Bore .051 inch MLS Head Gasket

Cometic Gasket

Part # C5751-051

Fits All Trims

Cometic GM LS1 SB 4.060 inch Bore .051 inch MLS Head Gasket

$97.74

Cometic GM LS1 SB 4.100in Bore .062in MLS-5 Head Gasket

Cometic Gasket

Part # C5489-062

Fits All Trims

Cometic GM LS1 SB 4.100in Bore .062in MLS-5 Head Gasket

$131.62

USA Standard Ring & Pinion Gear Set For GM 9.25in IFS Reverse Rotation in a 4.56 Ratio

Yukon Gear & Axle

Part # ZG GM9.25-456R

Fits All Trims

USA Standard Ring & Pinion Gear Set For GM 9.25in IFS Reverse Rotation in a 4.56 Ratio

$333.89

MAHLE Original Chevy LS Rear Main Seal Set

Victor Reinz

Part # JV1657

Fits All Trims

MAHLE Original Chevy LS Rear Main Seal Set

$34.55

Dayco

Part # 5040378DR

Fits All Trims

V-RIBBED, DRIVE RITE TRADITIONAL

$20.73

Cometic GM LS1 SB 4.130 inch Bore .051 inch MLS Head Gasket

Cometic Gasket

Part # C5317-051

Fits All Trims

Cometic GM LS1 SB 4.130 inch Bore .051 inch MLS Head Gasket

$97.74

COMP Cams

Part # 19024-16

Fits All Trims

COMP Cams Rocker Arm Ultra Gold Arc LS1

$787.03

BD Diesel

Part # 1057735

Fits All Trims

BD Diesel Throttle Sensitivity Booster - Chevy 2001-2005 6.6L Duramax

$316.24

Frequently Asked Questions

Do these parts fit my 2003 Chevrolet Silverado 1500 HD?

This page groups parts listed for the 2003 Chevrolet Silverado 1500 HD. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What engine & drivetrain options are available for my 2003 Chevrolet Silverado 1500 HD?

We offer a wide selection of engine & drivetrain parts for the 2003 Chevrolet Silverado 1500 HD. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 2003 Chevrolet Silverado 1500 HD?

We carry parts from trusted brands including Cometic Gasket, Yukon Gear & Axle, King Engine Bearings, Clevite, and ACL, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2003 Chevrolet Silverado 1500 HD parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 2003 Chevrolet Silverado 1500 HD parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

2003 Chevrolet Silverado 1500 HD(3,531 parts)

2003 Chevrolet Silverado 1500 HD(3,531 parts)

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Other Chevrolet Silverado 1500 HD Years

Engine & Drivetrain (742 products)

Cometic GM LS1 SB 4.130 inch Bore .098 inch MLS-5 Head Gasket

King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 (Size 010) Main Bearing Set

Cometic GM LS Gen-3/4 Small Block V8 .092in MLS Cylinder Head Gasket - 4.130in Bore

USA Standard Ring & Pinion Gear Set For GM 9.5in in a 4.88 Ratio

Cometic GM LS Gen-3/4 Small Block V8 .051in MLS Cylinder Head Gasket - 4.085in Bore - 1/2in Studs

MAHLE Original Buick Rainier 07-04 O-Ring

Fel-Pro Chevrolet Silverado 1500 70895 Exhaust Gas Recirculation (EGR) Valve Gasket

Eaton Detroit Locker Differential 33 Spline 1.37in Axle Shaft Diameter Front 9.25in Rear 9.5in

Fel-Pro Chevrolet Silverado 1500 CS 9284 Engine Conversion Gasket Set

Royal Purple Max ATF Automatic Transmission Fluid - 6 Gallon Bag-In-Box

Yukon Gear Standard Open and Gov-Loc Cross Pin Bolt w/ M10X1.5 Thread For 9.5in and 9.25in GM IFS

Cometic GM LS Gen-3/4 Small Block V8 .040in MLX Cylinder Head Gasket - 4.150in Bore

Cometic GM LS1 SB 4.060 inch Bore .051 inch MLS Head Gasket

Cometic GM LS1 SB 4.100in Bore .062in MLS-5 Head Gasket

USA Standard Ring & Pinion Gear Set For GM 9.25in IFS Reverse Rotation in a 4.56 Ratio

MAHLE Original Chevy LS Rear Main Seal Set

V-RIBBED, DRIVE RITE TRADITIONAL

Cometic GM LS1 SB 4.130 inch Bore .051 inch MLS Head Gasket

COMP Cams Rocker Arm Ultra Gold Arc LS1

BD Diesel Throttle Sensitivity Booster - Chevy 2001-2005 6.6L Duramax

Frequently Asked Questions

Do these parts fit my 2003 Chevrolet Silverado 1500 HD?

What engine & drivetrain options are available for my 2003 Chevrolet Silverado 1500 HD?

What brands make parts for the 2003 Chevrolet Silverado 1500 HD?

How fast do 2003 Chevrolet Silverado 1500 HD parts ship?

What warranty do your 2003 Chevrolet Silverado 1500 HD parts come with?