129+ 2020 GMC Sierra 3500 HD Engine & Drivetrain SLT Parts - Page 5

SLT · Engine & Drivetrain (128 products)

Exact-fit parts for the 2020 GMC Sierra 3500 HD SLT.

aFe Scorcher Blue Power Module 17-18 GM Diesel Trucks V8-6.6L (td) 5LP

aFe

Part # 77-84010

Confirmed Fit

aFe Scorcher Blue Power Module 17-18 GM Diesel Trucks V8-6.6L (td) 5LP

$607.74

Nitrous Express

Part # 15791-1

Confirmed Fit

Nitrous Express GM Duramax Solenoid Bracket

$48.91

ICON

Part # 89141532B

Confirmed Fit

ICON Alloys Lug Nut Kit Black - 14x1.5 - 32 Lug Nuts w/ Key

$77.34

Dayco

Part # 5060785

Fits with Conditions

POLY RIB BELT, DAYCO

$26.96

aFe Power Front/Rear Diff Cover Kit w/ Oil 20-25 GM Diesel Trucks V8 (AAM 9.25-12 & AAM 11.5-12-14)

aFe

Part # 46-7708AB

Confirmed Fit

aFe Power Front/Rear Diff Cover Kit w/ Oil 20-25 GM Diesel Trucks V8 (AAM 9.25-12 & AAM 11.5-12-14)

$982.75

Cometic GM 2017+ LP5 Duramax .060in MLX Cylinder Head Gasket - 4.161in Bore

Cometic Gasket

Part # C15177-060

Confirmed Fit

Cometic GM 2017+ LP5 Duramax .060in MLX Cylinder Head Gasket - 4.161in Bore

$160.95

NGK

Part # 90220

Confirmed Fit

NGK Ruthenium HX Spark Plug (LTR5AHX)

$11.94

AMP Research

Part # 19-04561-97L

Confirmed Fit

AMP Research 19-22 Dodge Ram 1500 Wire Harness Kit

$149.98

HPT L5P ECM Upgrade (*Original ECM Required*)

HP Tuners

Part # ECM-00-L5P-U

Confirmed Fit

HPT L5P ECM Upgrade (Original ECM Required)

$707.19

Wehrli

Part # WCF100459-IBB

Confirmed Fit

Wehrli 20-25 GM 2500/3500 HD Lower Splash Shield Kit - Illusion Blueberry

$331.78

Husky Liners

Part # 09051

Confirmed Fit

Husky Liners 19-23 Chevrolet Silverado 1500 Crew Cab Pickup GearBox Under Seat Storage Box

$169.99

FTI 9.5in 6L80E/6L90E Billet Triple Disc Lock-Up Street Racer Series - 3600 Hard Hit Stall

FTI Performance

Part # SRL86082-3

Confirmed Fit

FTI 9.5in 6L80E/6L90E Billet Triple Disc Lock-Up Street Racer Series - 3600 Hard Hit Stall

$1554.75

Reinz

Part # 81-10402-10

Fits with Conditions

Engine Crankshaft Seal

$37.86

NGK Single Iridium Spark Plug Box of 4 (LTR5IX-11)

NGK

Part # 4344

Confirmed Fit

NGK Single Iridium Spark Plug Box of 4 (LTR5IX-11)

$36.10

Wehrli

Part # WCF100114-CT

Confirmed Fit

Wehrli 20-24 GM Duramax - 19-23 Ram HD Rear Differential Cover - Candy Teal

$450.43

Fleece Performance

Part # FPE-61-10014-P

Confirmed Fit

Fleece Performance 17-23 GM 2500/3500 Freedom Series Cylinder Head (Passenger Side)

$1304.51

FTI 9.5in 6L80E/6L90E Billet Triple Disc Lock-Up Street Racer Series - 3800 Stall

FTI Performance

Part # SRL86391-3

Confirmed Fit

FTI 9.5in 6L80E/6L90E Billet Triple Disc Lock-Up Street Racer Series - 3800 Stall

$1554.75

MAHLE Original 17-23 GM 6.6L Duramax L5P Cylinder Head Gasket

Victor Reinz

Part # 55524

Confirmed Fit

MAHLE Original 17-23 GM 6.6L Duramax L5P Cylinder Head Gasket

$125.35

NGK Iridium/Platinum Spark Plug Box of 4 (ILTR5E11)

NGK

Part # 91418

Confirmed Fit

NGK Iridium/Platinum Spark Plug Box of 4 (ILTR5E11)

$42.09

Yukon Gear Master Overhaul Kit for 2019+ RAM AAM 11.5in Rear Differential

Yukon Gear & Axle

Part # YK AAM11.5-E

Confirmed Fit

Yukon Gear Master Overhaul Kit for 2019+ RAM AAM 11.5in Rear Differential

$614.89

Frequently Asked Questions

Do these parts fit my 2020 GMC Sierra 3500 HD SLT?

This page groups parts listed for the 2020 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 2020 GMC Sierra 3500 HD SLT?

We offer a wide selection of engine & drivetrain parts for the 2020 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 2020 GMC Sierra 3500 HD SLT?

We carry parts from trusted brands including Wehrli, aFe, Fel-Pro, FTI Performance, and NGK, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2020 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 2020 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.

2020 GMC Sierra 3500 HD(2,427 parts)

2020 GMC Sierra 3500 HD(2,427 parts)

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Other GMC Sierra 3500 HD Years

SLT · Engine & Drivetrain (128 products)

aFe Scorcher Blue Power Module 17-18 GM Diesel Trucks V8-6.6L (td) 5LP

Nitrous Express GM Duramax Solenoid Bracket