686+ 2018 GMC Sierra 3500 HD Engine & Drivetrain SLT Parts - Page 3

SLT · Engine & Drivetrain (684 products)

Exact-fit parts for the 2018 GMC Sierra 3500 HD SLT.

Fel-Pro

Part # TCS459931

Confirmed Fit

Fel-Pro Chevrolet Silverado 1500 TCS 45993-1 Engine Timing Cover Gasket Set

$66.46

Yukon Gear Master Overhaul Kit For GM 98+ 14T Diff

Yukon Gear & Axle

Part # YK GM14T-C

Confirmed Fit

Yukon Gear Master Overhaul Kit For GM 98+ 14T Diff

$656.89

Skyward Automotive

Part # SK264698

Fits with Conditions

Engine Oil Pan

$37.79

COMP Cams

Part # 54-453-11

Confirmed Fit

COMP Cams Camshaft LS1 269Lrr HR-113

$442.84

Nitrous Express

Part # 20933-12

Confirmed Fit

Nitrous Express GM LS 102mm Nitrous Plate Kit (50-400HP) w/12lb Composite Bottle

$1725.68

ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set

ACL

Part # 5M7299H-STD

Confirmed Fit

ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set

$181.73

Granatelli 96-22 GM LS Tall Valve Cover w/Angled Coil Mounts - Black Wrinkle (Pair)

Granatelli Motor Sports

Part # 640362

Confirmed Fit

Granatelli 96-22 GM LS Tall Valve Cover w/Angled Coil Mounts - Black Wrinkle (Pair)

$229.43

Pioneer Cable

Part # DA-3510

Fits with Conditions

HARMONIC BALANCER

$102.10

Cometic GM LS Gen-3/4 Small Block V8 .098in MLS Cylinder Head Gasket - 4.060in Bore

Cometic Gasket

Part # C5751-098

Confirmed Fit

Cometic GM LS Gen-3/4 Small Block V8 .098in MLS Cylinder Head Gasket - 4.060in Bore

$143.45

BD Diesel

Part # 1061650

Confirmed Fit

BD Diesel Deep Sump Trans Pan - 2001-2010 Chev Allison 1000

$478.23

COMP Cams

Part # 54-444-11

Confirmed Fit

COMP Cams Camshaft LS1 XEr273HR-14

$442.84

COMP Cams

Part # K54-448-11

Confirmed Fit

COMP Cams Camshaft Kit LS1 XEr287HR-12

$1406.53

COMP Cams

Part # 54-271-11

Confirmed Fit

COMP Cams GM LS3/LS4 HV Series Camshaft LS272PU-12

$442.84

Cometic GM LS Gen-3/4 Small Block V8 .066in MLX Cylinder Head Gasket - 4.040in Bore

Cometic Gasket

Part # C5505-066

Confirmed Fit

Cometic GM LS Gen-3/4 Small Block V8 .066in MLX Cylinder Head Gasket - 4.040in Bore

$129.27

COMP Cams

Part # 26918CS-KIT

Confirmed Fit

COMP Cams Kit Beehive Spring Steel LS

$522.92

Cometic GM LS1 SB 4.000 inch Bore .040 inch MLS Head Gasket

Cometic Gasket

Part # C5477-040

Confirmed Fit

Cometic GM LS1 SB 4.000 inch Bore .040 inch MLS Head Gasket

$97.74

Wehrli

Part # WCF100113-GW

Confirmed Fit

Wehrli 01-19 Chevrolet Duramax/03-19 Dodge Cummins 11.5in AAM Rear Diff. Cover - Gloss White

$423.23

Cometic GM LS1 SB 4.130 inch Bore .030 inch MLS Head Gasket

Cometic Gasket

Part # C5317-030

Confirmed Fit

Cometic GM LS1 SB 4.130 inch Bore .030 inch MLS Head Gasket

$97.74

Cognito

Part # 210-91025

Confirmed Fit

Cognito 17-19 Chevy/GMC Silverado/Sierra 2500/3500 HD CV Front Driveline Kit

$779.47

SCT Performance

Part # 5015PWD

Confirmed Fit

SCT Performance Livewire Vision Performance Monitor (for 1996+ Ford Vehicles)

$270.23

Frequently Asked Questions

Do these parts fit my 2018 GMC Sierra 3500 HD SLT?

This page groups parts listed for the 2018 GMC Sierra 3500 HD SLT. 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 2018 GMC Sierra 3500 HD SLT?

We offer a wide selection of engine & drivetrain parts for the 2018 GMC Sierra 3500 HD SLT. 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 2018 GMC Sierra 3500 HD SLT?

We carry parts from trusted brands including COMP Cams, Cometic Gasket, King Engine Bearings, ACL, and Wehrli, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2018 GMC Sierra 3500 HD SLT 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 2018 GMC Sierra 3500 HD SLT 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.

2018 GMC Sierra 3500 HD(3,671 parts)

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Other GMC Sierra 3500 HD Years

2018 GMC Sierra 3500 HD(3,671 parts)

Shop by Problem

Other GMC Sierra 3500 HD Years

SLT · Engine & Drivetrain (684 products)

Fel-Pro Chevrolet Silverado 1500 TCS 45993-1 Engine Timing Cover Gasket Set

Yukon Gear Master Overhaul Kit For GM 98+ 14T Diff

Engine Oil Pan

COMP Cams Camshaft LS1 269Lrr HR-113

Nitrous Express GM LS 102mm Nitrous Plate Kit (50-400HP) w/12lb Composite Bottle

ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set

Granatelli 96-22 GM LS Tall Valve Cover w/Angled Coil Mounts - Black Wrinkle (Pair)

HARMONIC BALANCER

Cometic GM LS Gen-3/4 Small Block V8 .098in MLS Cylinder Head Gasket - 4.060in Bore

BD Diesel Deep Sump Trans Pan - 2001-2010 Chev Allison 1000

COMP Cams Camshaft LS1 XEr273HR-14

COMP Cams Camshaft Kit LS1 XEr287HR-12

COMP Cams GM LS3/LS4 HV Series Camshaft LS272PU-12

Cometic GM LS Gen-3/4 Small Block V8 .066in MLX Cylinder Head Gasket - 4.040in Bore

COMP Cams Kit Beehive Spring Steel LS

Cometic GM LS1 SB 4.000 inch Bore .040 inch MLS Head Gasket

Wehrli 01-19 Chevrolet Duramax/03-19 Dodge Cummins 11.5in AAM Rear Diff. Cover - Gloss White

Cometic GM LS1 SB 4.130 inch Bore .030 inch MLS Head Gasket

Cognito 17-19 Chevy/GMC Silverado/Sierra 2500/3500 HD CV Front Driveline Kit

SCT Performance Livewire Vision Performance Monitor (for 1996+ Ford Vehicles)

Frequently Asked Questions

Do these parts fit my 2018 GMC Sierra 3500 HD SLT?

What engine & drivetrain options are available for my 2018 GMC Sierra 3500 HD SLT?

What brands make parts for the 2018 GMC Sierra 3500 HD SLT?

How fast do 2018 GMC Sierra 3500 HD SLT parts ship?

What warranty do your 2018 GMC Sierra 3500 HD SLT parts come with?