2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM)

Keep Your 2004 Chevrolet Trailblazer Ext in Top Shape with Quality Engine Control Modules (ECM)

Whether you’re repairing or upgrading your Engine Control Modules (ECM), using high-quality parts is key to keeping your 2004 Chevrolet Trailblazer Ext looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Engine Computers and Body Control Computers. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Competitive Prices and Extensive Inventory

The average price for a 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM) at Advance Auto Parts is around $273.66, with a range that starts at $183.99 and goes up to $563.99. With 4 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Engine Control Module, Powertrain Control Module, and Body Control Module start at just $183.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Control Modules (ECM), don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 2004 Chevrolet Trailblazer Ext in peak condition, inside and out.

Essential 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM)

GM Genuine Parts – Powertrain Control Module (Part No.19210065)

Powertrain Control Module

from

$563.99
GM Genuine Parts Refurbished Engine Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Refurbishing GM Genuine Parts Engine Control Modules involve returning the failed part to a factory certified repair facility for cleaning, inspection, and diagnosis. Any faulty components are identified and replaced when necessary, and the repaired unit is tested again to ensure it functions to GM specifications. In addition, refurbishing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • Refurbishing is an industry standard practice that returns parts into service rather than scrapping them
  • Tested to ensure they perform to GM specifications
See More

GM Genuine Parts – Engine Control Module (Part No.19299226)

Engine Control Module

from

$331.99
GM Genuine Parts Remanufactured Engine Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They regulate various parts of your vehicle’s engine by receiving input from sensors and additional modules and referencing that information back to other sensors, modules, and areas of the vehicle. Remanufacturing the engine control module is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and completed units are tested to help ensure they perform to GM specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Dictates the operation of your vehicle’s vital systems, which is critical to the performance of your vehicle
See More

GM Genuine Parts – Body Control Module (Part No.218-12763)

Body Control Module

from

$183.99
GM Genuine Parts Body Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They communicate with other systems in your vehicle to regulate electronic devices. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Dictates the operation of your vehicle’s vital systems, which is critical to the performance of your vehicle
  • 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
See More

Cardone – BODY CTRL COMP. (Part No.73-6782F)

BODY CTRL COMP.

from

$188.99
BODY CTRL COMP.

Most Popular Engine Computers for 2004 Chevrolet Trailblazer Exts

Enhance your 2004 Chevrolet Trailblazer Ext with one of the 2 Engine Computers we have in stock, starting at just $331.99.

GM Genuine Parts – Powertrain Control Module (Part No.19210065)

Powertrain Control Module

from

$563.99
GM Genuine Parts Refurbished Engine Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Refurbishing GM Genuine Parts Engine Control Modules involve returning the failed part to a factory certified repair facility for cleaning, inspection, and diagnosis. Any faulty components are identified and replaced when necessary, and the repaired unit is tested again to ensure it functions to GM specifications. In addition, refurbishing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • Refurbishing is an industry standard practice that returns parts into service rather than scrapping them
  • Tested to ensure they perform to GM specifications
See More

GM Genuine Parts – Engine Control Module (Part No.19299226)

Engine Control Module

from

$331.99
GM Genuine Parts Remanufactured Engine Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They regulate various parts of your vehicle’s engine by receiving input from sensors and additional modules and referencing that information back to other sensors, modules, and areas of the vehicle. Remanufacturing the engine control module is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and completed units are tested to help ensure they perform to GM specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Dictates the operation of your vehicle’s vital systems, which is critical to the performance of your vehicle
See More

Best-Selling 2004 Chevrolet Trailblazer Ext Body Control Computers

Upgrade your Trailblazer Ext with one of our 2 best-selling Body Control Computers.

Cardone – BODY CTRL COMP. (Part No.73-6782F)

BODY CTRL COMP.

from

$188.99
BODY CTRL COMP.

GM Genuine Parts – Body Control Module (Part No.218-12763)

Body Control Module

from

$183.99
GM Genuine Parts Body Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They communicate with other systems in your vehicle to regulate electronic devices. 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:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Dictates the operation of your vehicle’s vital systems, which is critical to the performance of your vehicle
  • 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
See More

FAQs for 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM)s

What are the best-selling Engine Control Modules (ECM)s for 2004 Chevrolet Trailblazer Exts?

Out of 4 Engine Control Modules (ECM)s that fit 2004 Chevrolet Trailblazer Exts, the following parts are the top sellers:

What’s the price range for 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM)?

The prices of Engine Control Modules (ECM) for the 2004 Chevrolet Trailblazer Ext range from $183.99 up to $563.99 for the most premium parts.

What is the average price of an Engine Control Modules (ECM) for a 2004 Chevrolet Trailblazer Ext?

The average price for Engine Control Modules (ECM)s for the 2004 Chevrolet Trailblazer Ext is $273.66. Keep in mind the variety of part types within our Engine Control Modules (ECM) category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Control Modules (ECM) for other Chevrolet Trailblazer Ext model years?

Yes, we carry Engine Control Modules (ECM) for 3 model years of Chevrolet Trailblazer Exts between 2002 and 2006. The following model years are the most popular for Engine Control Modules (ECM) purchases: 2006, 2005, 2003, and 2002.

What are the cheapest Engine Control Modules (ECM) for my 2004 Chevrolet Trailblazer Ext?

The cheapest 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM) we carry are:

Does Advance Auto Parts sell Engine Control Modules (ECM) for any other 2004 Chevrolet models?

What types of Engine Control Modules (ECM) do you sell for my 2004 Chevrolet Trailblazer Ext?

As of 11/2/25, these are some of the most in-demand types of Engine Control Modules (ECM) for a 2004 Chevrolet Trailblazer Ext:

Can I get help with 2004 Chevrolet Trailblazer Ext Engine Control Modules (ECM) orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Chevrolet Engine Control Modules (ECM) and more.

What is your return policy for Chevrolet Trailblazer Ext Engine Control Modules (ECM)?

Advance Auto Parts keeps returns simple. For new Chevrolet Trailblazer Ext Engine Control Modules (ECM) and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.