instrument cluster showing "service side detection system"

Service Side Detection System [Main Causes & Fix]

The ‘Service Side Detection System’ fault is a prevalent issue in GMC and Chevy vehicles, notably leading to recalls in certain model years.

Drawing on extensive research and practical experience, this article provides a comprehensive guide to understanding, diagnosing, and resolving this specific fault in your vehicle. Let’s dive into the details.

Troubleshooting the Service Side Detection System Fault

Cause Recommended Action
Corroded Connector Check and replace corroded connectors. Removal of bumper may be required. 
Dirt/Dust on Sensors Clean sensors carefully with a soft cloth and appropriate cleaning solution.
Water Damaged Module Replace the damaged module. Professional diagnostic recommended.
Resetting ‘Service Side Detection System’ Message
Under Warranty Take to GMC/Chevy dealer for a free fix.
Not Under Warranty Diagnostic check-up to determine whether to replace the harness or module. Consider purchasing parts online.
Cost Estimate
Repair Cost Average $500-1000 (parts and labor).
Part Numbers
Connector Harness Part Number: 84004718
Side Detection Module Part Number: 22960672
Lubricant Dielectric Part Number: N/A

What Does “Service Side Detection System” Mean?

Now, that I have explained what the side detection system is and how it works, now let’s look at what it means when you get a service side detection system on your GMC or Chevy.

In short, a service side detection system message means, your car has detected an issue with one of its side detection sensors or module and it needs to be serviced.

I will explain the main causes for this from working with many Chevy and GMC customers with a similar problems.

The Main Causes Side Detection System Fault in Detail

Here are the main causes that I have found cause this problem:

1. Corroded Connector that Goes to the Side Detection Module:

I have found that the side detection module connection cable can become corroded over time due to exposure to water or salt.

This causes an intermittent connection between the module and the car’s electrical system. The result is a “Service Side Detection System” warning message on your dashboard.

The first I recommend that you check when getting this message is all the connectors on the side detection module.

They should be free of corrosion and not damaged in any way. If you find any corrosion or damage, replace them with a new connector harness on both sides.

Unfortunately, you will have to remove the bumper to get to the module, that is why I would advise you to take it to a GMC dealer if you are still covered under a warranty or to a qualified auto mechanic if you are not.

After you replace the connectors, you can test them by starting the car and turning on the ignition light.

2. Dirt/Dust Blocking Blind Spot Radar Sensors

Other than corroded sensors, there is also the possibility that dirt or dust could be blocking them.

You can clean the sensors by using a soft cloth and rubbing alcohol or water with dish soap (only if you know what you are doing).

3. Damaged Side Detection Module Due to Water Damage

If you have been driving a lot in rainy weather or if your car has been submerged under water, it is likely that the side detection module was damaged by water.

This is a very rare event but it does happen.

Once the water makes contact with the side detection module it can cause corrosion and damage, which will then cause the side detection system to malfunction.

If the module is damaged by water then you will replace it, unfortunately, these modules are hard to repair and they are relatively costly to replace.

How to Fix and Reset the “Service Side Detection System” Message?

The first thing I would advise you to do is, if you are still covered under warranty, take the vehicle to the nearest GMC or Chevy dealer, they should fix the problem for you at no extra cost since this is a common issue that GMC is aware of.

If you are not covered by warranty then you will have to pay for repairs, I recommended taking your car for a diagnostic/check-up first, this will help you know whether it’s the connecting harness that you need to replace or the module itself.

How Much Does it Cost to Fix a GMC Service Side Detection System?

The cost of fixing and resetting the service side detection system will vary based on what is causing the problem.

The average cost is $500-1000 including both parts and labor.

If you are not under warranty and looking to cut down some costs then I recommend that you buy the parts online and have a qualified mechanic, replace them for you instead of going to the dealer route.

Here are the part numbers of the parts that you need to fix your GMC service side detection system:

  1. Connector Harness Part Number: 84004718
  2. Side Detection Module Part Number: 22960672
  3. Lubricant Dielectric Part Number:

Additional Sources:

1 thought on “Service Side Detection System [Main Causes & Fix]”

Leave a Comment

Your email address will not be published. Required fields are marked *