How to Put Your 2018 GMC Acadia in Rear Brake Service Mode
If you’re working on replacing the rear brake pads or rotors on your 2018 GMC Acadia, you’ll need to put the electronic parking brake into what’s called rear brake service mode. You can use this method to retract the brake pistons and replace the brake parts. It might seem complicated but no need to stress. I’ll guide you on how to get it done!
Why You Need to Use Rear Brake Service Mode
In the 2018 GMC Acadia and various newer GM cars they’ve switched to using a parking brake of the traditional manual one operated by a pedal or hand lever. While its handy it does add a layer of complexity when it comes to brake maintenance.
The thing is, with this setup you can’t simply push in the brake caliper pistons using a C clamp or piston tool, like you would on models. The motors and electronics create obstacles in doing. That’s where rear brake service mode comes in – it retracts the parking brake so you can service the brakes.
When changing the brakes on your Acadia it’s important to activate the EPB service mode. If you overlook this step you’ll encounter difficulties compressing the pistons to accommodate the pads. There’s a risk of harming the calipers. Not a good situation!
Ways to Activate Rear Brake Service Mode
There are two main methods to get your 2018 GMC Acadia into rear brake service mode so you can work on those rear brakes:
- To check for compatibility utilize a tool that works well with the system.
- Alternatively you can opt for an approach by engaging the parking brake switch.
- While using a tool is efficient and automated if you lack one there’s no need to fret!
- You can always resort to the procedure.
Using a Scan Tool to Enter Service Mode
The simplest way to put your Acadia into rear brake service mode is with a scan tool that can control the electronic parking brake module. Using a scanner is ideal. Even a regular OBD2 device can get the job done. Simply connect your scanning tool access the EPB control menu. Instruct it to enter service mode. Thats it the computer will retract the parking brake motors. Pistons effortlessly, for you! It’s a breeze.
This method is definitely recommended if you have a scanning tool. It’s quick and easy, without any need to tinker with buttons or start up sequences. Moreover it reduces the chances of causing any issues.
Manually Putting EPB in Service Mode
If you don’t have a tool handy don’t worry! You can still put your 2018 Acadias brakes into service mode using the method. It may require an steps but its completely manageable. Here’s what you need to do;
- Make sure the vehicle is, in park and turn the ignition on (with the engine off).
- 2.. Hold down the brake pedal.
- Hold down the EPB switch for 5 seconds.
- Keep an eye out for the parking brake light to begin flashing.
- Release the EPB switch then promptly. Release it again.
- The parking brake will now be retracted, putting you in service mode!
Just proceed calmly. Keep an eye on the dashboards parking brake light. Once it starts flashing that signals you to release the EPB switch and quickly tap it again to confirm and finalize the process.
After completing your brake maintenance work simply turn off the ignition and back on to exit service mode. The module will automatically re activate the parking brake and restore it to its functioning.
This manual procedure for service mode is applicable to GM vehicles from 2017 2022 with parking brakes, including models like 2018 GMC Acadia, Chevy Traverse, Buick Enclave, Cadillac XT5, among others.
Give it a shot the time you’re changing the brake pads and rotors, on your GM vehicle!
Tips for Acadia Rear Brake Service
While you’ve got rear brake service mode engaged on your 2018 Acadia, I figured I’d throw in some quick tips to make the job go smooth:
- Make sure to use the compressor tool when retracting the pistons. Avoid using a C clamp or channel locks as they can harm the boot and cause leaks.
- It’s essential to replace your brake hardware! If you have slides and worn out pad shims your new brakes won’t perform well. Don’t skimp, on quality!
- Remember to lubricate the bolts, shims and all moving parts with brake grease. This will help your brakes function smoothly and last longer.
- Inspect the rotors carefully. If they are within specifications and not warped, gouged or heavily rusted simply install the pads. However if they are, in condition consider replacing or resurfacing them.
Final Thought
There ya have it! Now you know how to activate rear brake service mode on your 2018 GMC Acadia and swap out those rear brake pads and rotors. At first it can feel a bit daunting especially dealing with the parking brake. However it’s not as complicated as it may appear. Keep in mind that the brake service mode is designed for use while you’re working on the brakes. Avoid driving with it activated! Once you’ve finished your work remember to deactivate it and ensure that the parking brake functions again.
