05 Equinox EGR Retrofit Wiring Diagram: A Comprehensive Guide

If you’re looking for an EGR retrofit wiring diagram for your 05 Equinox, you’ve come to the right place. In this article, we’ll guide you through the process of installing an EGR system on your Equinox, including the wiring diagram, tools required, and frequently asked questions (FAQs). So, let’s get started!

What is an EGR Retrofit?

Before we jump into the diagram, let’s first understand what an EGR retrofit is. An EGR retrofit is a process of installing an EGR (Exhaust Gas Recirculation) system on an engine that didn’t come with one. The purpose of an EGR system is to reduce emissions by recirculating exhaust gases back into the engine cylinder. This process reduces NOx emissions, which are harmful to the environment.

Now that you have an idea of what an EGR retrofit is, let’s move on to the wiring diagram.

Wiring Diagram for 05 Equinox EGR Retrofit

Wire Color Pin Number Description
Brown/White 51 EGR Valve Position Sensor Signal
Black/White 52 Ground
Pink 53 EGR Solenoid Valve Control Signal
Light Green/Black 3 MAP Sensor Signal
Black 5 Ground

The wiring diagram above shows the connections for the EGR valve position sensor signal, EGR solenoid valve control signal, and the ground wire. The MAP sensor signal is also shown on this diagram as it plays an important role in the operation of the EGR system. The wiring diagram is straightforward and easy to follow. Ensure that the connections are properly made to avoid any issues in the future.

Tools Required for EGR Retrofit on 05 Equinox

Here are some of the tools you will need for the EGR retrofit process:

  • Socket Set
  • Ratchet
  • Extension Bar
  • Wire Strippers
  • Crimping Tool

Make sure you have these tools before proceeding with the installation of the EGR system.


What are the benefits of installing an EGR system?

The primary benefit of installing an EGR system is to reduce NOx emissions. This reduction in emissions helps the environment and reduces the emission of greenhouse gases that contribute to climate change.

Is it necessary to install an EGR system on my 05 Equinox?

It depends on your state’s regulations. Some states require the installation of an EGR system on vehicles that didn’t come equipped with one. It’s best to check your state’s regulations before deciding to install an EGR system on your Equinox.

Can I install the EGR system myself?

Yes, you can install the EGR system yourself if you have the necessary tools and knowledge. However, if you’re not confident in your abilities, it’s best to seek professional help.

What happens if the EGR system isn’t working properly?

If the EGR system isn’t working properly, it can cause increased emissions, reduced fuel efficiency, and even damage to the engine. It’s important to ensure that the EGR system is installed correctly and functioning properly.

Can I drive my Equinox without an EGR system?

No, you cannot drive your Equinox without an EGR system if it’s required by your state’s regulations. Driving without an EGR system can result in fines and penalties.


Installing an EGR system on your 05 Equinox may seem like a daunting task, but with this wiring diagram and guide, it’s a straightforward process. Ensure that you have the necessary tools, follow the wiring diagram, and make the proper connections to avoid any issues in the future. Remember to check your state’s regulations to determine if the installation of an EGR system is required. Good luck with your EGR retrofit installation!