2020 GMC Sierra 2500 HD Transmission Parts

Essential 2020 GMC Sierra 2500 HD Transmission Parts

ACDelco – AT Rear Seal (Part No.J5071366796ACD)

AT Rear Seal

from

$29.65
AT Rear Seal

Dorman – Transfer Case Seal Kit (Part No.600-218)

Transfer Case Seal Kit

from

$20.29
Transfer case seals missing or deteriorated? This transfer case output shaft seal kit allows you to restore a proper seal between the transfer case and motor to eliminate drivability issues from liquid or debris entering the transfer case.

Product Features:
  • Direct replacement – this transfer case seal kit allows you to directly replace the original seal on certain vehicle applications
  • Effective fix – restores proper seal between transfer case and motor to keep out contaminants
  • Durable construction – built for reliable longevity, free of defects in materials and craftmanship
  • Trustworthy quality – backed by team of designers and engineers in the United States
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Spartan – Automatic Transmission Assembly; GM 4WD 6L90 6-Speed (Part No.8201A-JMBF)

Automatic Transmission Assembly; GM 4WD 6L90 6-Speed

from

$3877.99
Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.

Product Features:
  • Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
  • If we have important installation information it will be included on tags or in the paperwork packaged with your transmission.
  • Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
  • All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.
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Shift Pro by ETE – 6L90 Automatic Transmission Assembly (Part No.T282104)

6L90 Automatic Transmission Assembly

from

$2939.99
At Shift Pro Inc, fully remanufactured transmissions go beyond the name. So, what’s in that name to start? Pro Engineering: your transmission has been re-engineered to meet or exceed OE standards for tolerances, durability, and quality. Pro Performance: upgraded components and a fully remanufactured torque converter add to enhanced durability over your transmission’s lifetime. Pro Performance: hot-, cold-, load-, and simulated road-tested on custom dynamometers, your transmission is ready to go, wherever you’re headed.

Product Features:
  • Fully tested torque converter included. Shift Pro Inc tests for leaks, lock-up, concentricity, and balance to eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
  • All dynamometer testing is conducted with Shift Pro Inc’s custom testing program for at least 30 minutes.
  • During dynamometer testing, Shift Pro Inc transmissions are cold, hot, load, and road tested using a fully synthetic transmission fluid and filtration system.
  • All wear-prone valves in the completely remanufactured valve body are restored to stringent specifications and vacuum tested to verify proper function.
  • Shift Pro Inc’s quality control process includes build specification checks performed by four different specialized technicians during the remanufacturing process.
  • No paperwork or registration is required with Shift Pro Inc’s warranty. Each no-hassle warranty is attached to the vehicle VIN and transferrable with ownership.
  • Product might not be available in all states due to local laws.
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Dorman – Help – Transmission Oil Cooler Seal (Part No.66219)

Transmission Oil Cooler Seal

from

$11.49
This Dorman Automatic Transmission Oil Cooler Gasket eliminates leaks where the oil cooler line connects to the transmission. Gasket may break down over time, causing leaks, and should be replaced any time the oil cooler line and transmission are separated.

Product Features:
  • Durable construction – rubber over steel construction creates a positive seal and retains its shape
  • Direct replacement – fits and functions like original equipment
  • Easy to install – direct-fit, no special tools required
  • Vehicle tested – has undergone on-vehicle testing to ensure proper fit and performance
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ATP – AT EXT HOUSING SEAL (Part No.JO-57)

AT EXT HOUSING SEAL

from

$7.99
AT EXT HOUSING SEAL

National – Multi Purpose Seal (Part No.415988)

Multi Purpose Seal

from

$17.99
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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ACDelco – AT Valve Body Separa (Part No.J5028745013ACD)

AT Valve Body Separa

from

$33.03
AT Valve Body Separa

Dorman – Help – Shift Cable Bushing Kit (Part No.14104)

Shift Cable Bushing Kit

from

$21.99
Fixing a broken automatic transmission shift cable usually requires replacing the entire cable assembly. This Dorman OE FIX shift cable bushing kit saves expense by allowing the replacement of just the failed bushing..

Product Features:
  • Convenient solution – this shift cable bushing kit directly replaces a broken bushing and eliminates the need to replace the entire cable assembly.
  • Save time and money – save the expense and significant installation time of replacing an entire cable assembly
  • Ensure fit – this bushing kit is vehicle-specific and precision-engineered for specified General Motors and Chrysler models and years
  • Trustworthy quality – designed in the United States and backed by more than a century of automotive aftermarket excellence
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Dorman – Help – Shift Cable Bushing (Part No.14073)

Shift Cable Bushing

from

$18.79
Fixing a broken automatic transmission shift cable usually requires replacing the entire cable assembly. This Dorman OE FIX shift cable bushing saves expense by allowing the replacement of just the failed bushing.

Product Features:
  • Convenient solution – this shift cable bushing directly replaces a broken bushing and eliminates the need to replace the entire cable assembly
  • Save time and money – save the expense and significant installation time of replacing an entire cable assembly
  • Ensure fit – this bushing is vehicle-specific and precision-engineered for specified Chevrolet, GMC, Isuzu, and Oldsmobile models and years
  • Trustworthy quality – designed in the United States and backed by more than a century of automotive aftermarket excellence
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GM Genuine Parts – Park/Neutral Position and Back-Up Lamp Switch (Part No.D2263C)

Park/Neutral Position and Back-Up Lamp Switch

from

$85.99
GM Genuine Parts Parking / Neutral Position and Back Up Light Switches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
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ACDelco – Park/Neutral Position and Back-Up Lamp Switch (Part No.D2256C)

Park/Neutral Position and Back-Up Lamp Switch

from

$233.99
ACDelco GM Original Equipment Parking / Neutral Position and Back Up Light Switches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.

Product Features:
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
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Carquest – Neutral Safety Switch (Part No.NS38117)

Neutral Safety Switch

from

$104.05
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
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ACDelco – Neutral Safety Switc (Part No.J4050351665ACD)

Neutral Safety Switc

from

$142.24
Neutral Safety Switc

Anchor – Transmission Mount: Rear, 1 Piece (Part No.2638)

Transmission Mount: Rear, 1 Piece

from

$23.49
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to CADI 99-14; CHEV 82-19; GMC 82-14; HUMMER 03-10; ISUZU 06-08; OLDS 91-94;. Please verify your application.

Product Features:
  • MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
  • MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
  • HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
  • SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
  • HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
  • For Years: 1982-2019
  • Weight approx: 5 Lbs
  • STUDS: M10-150
  • INTERLOCK
  • BOLT HOLES CENTERLINE: 7.5 INCH / 190.5 MM
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Anchor – Transmission Mount: Rear, 1 Piece (Part No.3249)

Transmission Mount: Rear, 1 Piece

from

$56.99
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to CADI 15-20; CHEV 11-20; GMC 11-20;. Please verify your application.

Product Features:
  • MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
  • MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
  • HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
  • SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
  • HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
  • For Years: 2011-2020
  • Weight approx: 4 Lbs
  • WITH INTERLOCK
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Anchor – Transmission Mount: Rear, 1 Piece (Part No.3264)

Transmission Mount: Rear, 1 Piece

from

$42.99
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to CHEV 11-16; GMC 11-16;. Please verify your application.

Product Features:
  • MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
  • MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
  • HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
  • SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
  • HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
  • For Years: 2011-2016
  • Weight approx: 4 Lbs
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Anchor – Transmission Mount: Rear, 1 Piece (Part No.2839)

Transmission Mount: Rear, 1 Piece

from

$27.99
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to CHEV 94-10; GMC 94-10; ISUZU 98-00; OLDS 96-01;. Please verify your application.

Product Features:
  • MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
  • MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
  • HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
  • SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
  • HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
  • For Years: 1994-2010
  • Weight approx: 4 Lbs
  • WITHOUT INTERLOCK
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Felpro – AUTOMATIC TRANSMISSION OIL PAN GASKET (Part No.TOS 18752)

AUTOMATIC TRANSMISSION OIL PAN GASKET

from

$36.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Permatex – Ultra Grey RTV Silicone Gasket Maker, 3 OZ (Part No.82194)

Ultra Grey RTV Silicone Gasket Maker, 3 OZ

from

$11.49
Permatex Ultra Grey is specified for high torque and high vibration applications. Ultra Grey offers a sensor-safe, low odor, non-corrosive formula and is OEM specified to fit dealership warranty requirements. This high performance gasket maker meets performance specs of OE silicone gaskets and can be used on high torque and vibration applications such as valve covers, water pump, intake manifold end seals ad thermostat housings.

Product Features:
  • High torque and rigidity
  • Sensor-safe, non-corrosive formula
  • OEM specified
  • Low-odor, non-corrosive formula
  • Ideal for closed spaced bolt patterns
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ATP – REUSABLE AT PAN GSKT (Part No.JG-142)

REUSABLE AT PAN GSKT

from

$36.99
REUSABLE AT PAN GSKT

ATP – AT OIL PAN GASKET (Part No.JG-107)

AT OIL PAN GASKET

from

$9.99
AT OIL PAN GASKET

ACDelco – AT Pan Gasket (Part No.J5040577055ACD)

AT Pan Gasket

from

$71.79
AT Pan Gasket

ACDelco – AT Pan Gasket (Part No.J5040366488ACD)

AT Pan Gasket

from

$37.47
AT Pan Gasket

Felpro – AUTOMATIC TRANSMISSION OIL PAN GASKET (Part No.TOS 18698)

AUTOMATIC TRANSMISSION OIL PAN GASKET

from

$15.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

ATP – REUSABLE AT PAN GSKT (Part No.JG-136)

REUSABLE AT PAN GSKT

from

$41.99
REUSABLE AT PAN GSKT

2020 GMC Sierra 2500 HD Transmission Parts

You count on your 2020 GMC Sierra 2500 HD to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Transmission Parts. With 12 Transmission Parts ranging in price from $9.25 to $2,974.99, you’re sure to find everything you need for your 2020 GMC Sierra 2500 HD.

Brands matter. If you want to shop a specific Transmission Parts brand, we stock 6 different brands like Permatex, Dorman, and AC Delco. 2020 GMC Sierra 2500 HD Transmission Parts start as low as $9.25!

One of the best ways to find top quality OEM or aftermarket Transmission Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 760 extensive product reviews on 2020 GMC Sierra 2500 HD Transmission Parts.

Did we mention you can order your Transmission Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Transmission Parts inventory for your 2020 GMC Sierra 2500 HD below to get started!

Top-Rated Transmission Parts Brands For Your 2020 GMC Sierra 2500 HD

Trusted Transmission Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2020 GMC Sierra 2500 HD running right for years to come. In our inventory you’ll find brands like Permatex, Dorman, AC Delco, and even more.

Popular Permatex Transmission Parts

You’ll find popular Permatex brand products across Automatic Transmission Pan and Gaskets. All are waiting to get your 2020 GMC Sierra 2500 HD back on the road. Some of the top-rated Permatex products in these categories are:
Ultra Grey RTV Silicone Gasket Maker, 3 OZ
from $11.49
(95)
Ultra Grey RTV Silicone Gasket Maker, 3 OZ
Transmission Pan Gaskets

FAQs for 2020 GMC Sierra 2500 HD Transmission Parts

What are the most purchased Transmission Parts for the 2020 GMC Sierra 2500 HD?

Out of 12 Transmission Parts for the 2020 GMC Sierra 2500 HD, the most popular in our inventory are:
Shift Cable Bushing Kit
from $21.99
This product is not rated
Shift Cable Bushing Kit
Automatic Transmission Shift Linkage Bushings
Transmission Oil Cooler Seal
from $11.49
This product is not rated
Transmission Oil Cooler Seal
Automatic Transmission Oil Cooler Gaskets
AT Rear Seal
from $18.47
This product is not rated
AT Rear Seal
Extension Housing Seals