2021 Chevrolet Trailblazer Transmission Parts

Essential Transmission Parts for 2021 Chevrolet Trailblazers

Carquest Premium – Multi-Use Connector (Part No.PTA1078)

Multi-Use Connector

from

$31.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Product constructed to meet all design and operating characteristics as intended by the manufacturer.
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
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ACDelco – Multi-Purpose Pigtail (Part No.PT2834)

Multi-Purpose Pigtail

from

$39.99
ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Protective outer coverings help provide long-lasting durability
  • Color-coded wires allow for easy installation
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function
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Carquest Premium – Multi-Use Connector (Part No.PTA1121)

Multi-Use Connector

from

$65.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
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Dorman – Help – Transmission Oil Cooler Seal (Part No.66219)

Transmission Oil Cooler Seal

from

$12.49
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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Upgrade your 2021 Chevrolet Trailblazer with Top-Quality Transmission Parts

When it comes to maintaining or upgrading your 2021 Chevrolet Trailblazer, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Chevrolet or enhancing its overall performance, Transmission Parts are key to keeping your Trailblazer functioning at its best. At Advance Auto Parts, we offer a wide selection of 2 Transmission Parts for the 2021 Chevrolet Trailblazer, designed to meet your needs without breaking the bank. From Back Up Neutral Safety Part replacements to Automatic Transmission Pan and Gaskets upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 2021 Chevrolet Trailblazer at great prices. Our Transmission Parts inventory for this model ranges from just $12.49 to $39.99, with an average price of $30.82. Our 2 Transmission Parts in stock come from 2 trusted brands, so you’re sure to find the right part for your 2021 Chevrolet Trailblazer without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2021 Chevrolet Trailblazer is always ready to roll. We’re committed to providing you with everything you need to keep your Trailblazer in top shape, all in one place. Start shopping confidently below for your 2021 Chevrolet Trailblazer!

Best-Selling Back Up Neutral Safety Parts for 2021 Chevrolet Trailblazers

Enhance the driving experience in your Chevrolet with 1 quality Back Up Neutral Safety Part components, starting at $39.99.

ACDelco – Multi-Purpose Pigtail (Part No.PT2834)

Multi-Purpose Pigtail

from

$39.99
ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Protective outer coverings help provide long-lasting durability
  • Color-coded wires allow for easy installation
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function
See More

Most Popular 2021 Chevrolet Trailblazer Automatic Transmission Pan and Gaskets

Customize your Chevrolet with 1 Automatic Transmission Pan and Gaskets products like Automatic Transmission Oil Cooler Gaskets, all priced under $12.49.

Dorman – Help – Transmission Oil Cooler Seal (Part No.66219)

Transmission Oil Cooler Seal

from

$12.49
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
See More

FAQs for 2021 Chevrolet Trailblazer Transmission Parts

Which Transmission Parts are best-sellers for 2021 Chevrolet Trailblazers?

Out of 2 Transmission Parts that fit 2021 Chevrolet Trailblazers, the following parts are the top sellers:

What’s the price range for 2021 Chevrolet Trailblazer Transmission Parts?

Transmission Part prices for the 2021 Chevrolet Trailblazer start at $12.49 and go up to $39.99 for the most premium parts.

What’s the average price of a Transmission Part for a 2021 Chevrolet Trailblazer?

The average price for Transmission Parts for the 2021 Chevrolet Trailblazer is $30.82. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Transmission Parts for other Chevrolet Trailblazer model years?

Yes, we currently carry Transmission Parts for 12 model years of Chevrolet Trailblazers between 2002 and 2026. Transmission Parts are bought most frequently for the following model years: 2022, 2009, 2008, 2007, 2006, 2005, 2004, 2003, and 2002.

What are the cheapest Transmission Parts for my 2021 Chevrolet Trailblazer?

The cheapest 2021 Chevrolet Trailblazer Transmission Parts we carry in stock are:

What types of Transmission Parts do you sell for my 2021 Chevrolet Trailblazer?

As of 11/2/25, these are some of the most in-demand types of Transmission Parts for a 2021 Chevrolet Trailblazer:

Can I get help with 2021 Chevrolet Trailblazer Transmission Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Chevrolet Transmission Parts and more.

What is your return policy for Chevrolet Trailblazer Transmission Parts?

Advance Auto Parts keeps returns simple. For new Chevrolet Trailblazer Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.