94+ 2023 GMC Sierra 3500 HD Engine & Drivetrain AT4 Parts - Page 2

AT4 · Engine & Drivetrain (93 products)

Exact-fit parts for the 2023 GMC Sierra 3500 HD AT4.

Dayco

Part # 5060785DR

Fits with Conditions

V-RIBBED, DRIVE RITE TRADITIONAL

$19.67

aFe 2020 Chevrolet Silverado 2500 HD Rear Differential Cover Black ; Pro Series w/ Machined Fins

aFe

Part # 46-71260B

Confirmed Fit

aFe 2020 Chevrolet Silverado 2500 HD Rear Differential Cover Black ; Pro Series w/ Machined Fins

$394.21

Standard Motor Products

Part # S-1414

Fits with Conditions

CANISTER PURGE VALVE CONNECTOR

$33.51

Dorman

Part # 264-882

Fits with Conditions

Engine Oil Pan

$122.48

Banks Power

Part # 19288

Confirmed Fit

Banks Power 19+ Ram / Ram-Air Differential Cover Kit Black Ops, w/Hardware

$491.98

Standard Motor Products

Part # EGV1289

Fits with Conditions

EGR Valve

$422.47

Yukon Gear Dura Grip For GM & Chrysler 11.5in / 30 Spline

Yukon Gear & Axle

Part # YDGGM11.5-30-1

Confirmed Fit

Yukon Gear Dura Grip For GM & Chrysler 11.5in / 30 Spline

$1719.89

Fleece Performance

Part # FPE-L5P-MAP-SPR

Confirmed Fit

Fleece Performance 17-22 GM 2500/3500 Duramax MAP Sensor Spacer & Boost Reference Port

$75.06

Wehrli

Part # WCF100442

Confirmed Fit

Wehrli 2001+ GM Duramax LB7/LLY/LBZ/LMM/LML/L5P Billet Oil Fill Cap - Clear Anodized

$54.27

J&L 20-26 Chevy Silverado/GMC Sierra 2500/3500 6.6L Drivers Side Oil Separator 3.0 - Clear Anodi

J&L

Part # 3089D-C

Confirmed Fit

J&L 20-26 Chevy Silverado/GMC Sierra 2500/3500 6.6L Drivers Side Oil Separator 3.0 - Clear Anodi

$177.38

Dayco

Part # 4PK888EE

Fits with Conditions

POLY RIB BELT, DAYCO

$19.93

Wehrli

Part # WCF100459-GRY

Confirmed Fit

Wehrli 20-24 GM 2500/3500 HD Lower Splash Shield Kit - WCFab Grey

$331.78

aFe 14-24 GM Cars/Trucks/SUV SCORCHER High-Performance Ignition Coil - Set of 8

aFe

Part # 77-92003-MD

Confirmed Fit

aFe 14-24 GM Cars/Trucks/SUV SCORCHER High-Performance Ignition Coil - Set of 8

$606.35

Westin

Part # 27-2255

Confirmed Fit

Westin 2019 Chevrolet Silverado/Sierra 1500 Double/CC Non LD Running Board Mount Kit - Black

$148.80

Royal Purple

Part # 26512

Confirmed Fit

Royal Purple Synchromax Synthetic Manual Transmission Fluid (Canada) - 1 Quart

$107.94

Wehrli

Part # WCF100134-GW

Confirmed Fit

Wehrli 20-24 L5P Duramax WCFAB X PPE High Capacity Aluminum Oil Pan - Gloss White

$553.79

BD Diesel

Part # 1057932

Confirmed Fit

BD Diesel Throttle Sensitivity Booster - Dodge / Ford / Jeep

$281.55

Mishimoto

Part # MMIG-LS3V-07

Confirmed Fit

Mishimoto 2007+ GM Gen V LS3 Style Engine Ignition Coil

$67.91

aFe GM Diesel Trucks 20-25 V8-6.6L L5P POWER Street Series Transmission Pan Raw w/ Machined Fins

aFe

Part # 46-71380A

Confirmed Fit

aFe GM Diesel Trucks 20-25 V8-6.6L L5P POWER Street Series Transmission Pan Raw w/ Machined Fins

$463.81

Wehrli

Part # WCF100459-FTB

Confirmed Fit

Wehrli 20-2024 GM 2500/3500 HD Lower Splash Shield Kit - Fine Texture Black

$306.18

Frequently Asked Questions

Do these parts fit my 2023 GMC Sierra 3500 HD AT4?

This page groups parts listed for the 2023 GMC Sierra 3500 HD AT4. 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 2023 GMC Sierra 3500 HD AT4?

We offer a wide selection of engine & drivetrain parts for the 2023 GMC Sierra 3500 HD AT4. 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 2023 GMC Sierra 3500 HD AT4?

We carry parts from trusted brands including Wehrli, aFe, FTI Performance, Dayco, and Royal Purple, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2023 GMC Sierra 3500 HD AT4 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 2023 GMC Sierra 3500 HD AT4 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.

2023 GMC Sierra 3500 HD(1,911 parts)

2023 GMC Sierra 3500 HD(1,911 parts)

Shop by Problem

Other GMC Sierra 3500 HD Years

AT4 · Engine & Drivetrain (93 products)

V-RIBBED, DRIVE RITE TRADITIONAL

aFe 2020 Chevrolet Silverado 2500 HD Rear Differential Cover Black ; Pro Series w/ Machined Fins

CANISTER PURGE VALVE CONNECTOR

Engine Oil Pan

Banks Power 19+ Ram / Ram-Air Differential Cover Kit Black Ops, w/Hardware

EGR Valve

Yukon Gear Dura Grip For GM & Chrysler 11.5in / 30 Spline

Fleece Performance 17-22 GM 2500/3500 Duramax MAP Sensor Spacer & Boost Reference Port

Wehrli 2001+ GM Duramax LB7/LLY/LBZ/LMM/LML/L5P Billet Oil Fill Cap - Clear Anodized

J&L 20-26 Chevy Silverado/GMC Sierra 2500/3500 6.6L Drivers Side Oil Separator 3.0 - Clear Anodi

POLY RIB BELT, DAYCO

Wehrli 20-24 GM 2500/3500 HD Lower Splash Shield Kit - WCFab Grey

aFe 14-24 GM Cars/Trucks/SUV SCORCHER High-Performance Ignition Coil - Set of 8

Westin 2019 Chevrolet Silverado/Sierra 1500 Double/CC Non LD Running Board Mount Kit - Black

Royal Purple Synchromax Synthetic Manual Transmission Fluid (Canada) - 1 Quart

Wehrli 20-24 L5P Duramax WCFAB X PPE High Capacity Aluminum Oil Pan - Gloss White

BD Diesel Throttle Sensitivity Booster - Dodge / Ford / Jeep

Mishimoto 2007+ GM Gen V LS3 Style Engine Ignition Coil

aFe GM Diesel Trucks 20-25 V8-6.6L L5P POWER Street Series Transmission Pan Raw w/ Machined Fins

Wehrli 20-2024 GM 2500/3500 HD Lower Splash Shield Kit - Fine Texture Black

Frequently Asked Questions

Do these parts fit my 2023 GMC Sierra 3500 HD AT4?

What engine & drivetrain options are available for my 2023 GMC Sierra 3500 HD AT4?

What brands make parts for the 2023 GMC Sierra 3500 HD AT4?

How fast do 2023 GMC Sierra 3500 HD AT4 parts ship?

What warranty do your 2023 GMC Sierra 3500 HD AT4 parts come with?