What is The ShockSims® OBD/SS?
The OBD/SS Module is our most popular product. It provides a plug-n-play solution for replacing stock magnetic (FE4 - F55 - Z95) suspension on the latest generation of GM vehicles.
The module plugs into the OBD2 port communicating ONLY with the Suspension Control Module (SCM). The Module then manages the behavior of your vehicle's SCM so no speed limiter or service suspension messages will be present.
Where do I plug in the OBD/SS Module?
Our Classic module with the largest vehicle support plug into the OBD2 port.
Our other modules may require alternate power sources or additional signal taps. Please refer to each product page for install guides.
What DTC codes will the OBD/SS suppress?
C0575 - LF Shock absorber solenoid circuit open/short
C0580 - RF Shock absorber solenoid circuit open/short
C0585 - LR Shock absorber solenoid circuit open/short
C0590 - RR Shock absorber solenoid circuit open/short
C0595 - LF Shock absorber solenoid performance
C0600 - RF Shock absorber solenoid performance
C0605 - LR Shock absorber solenoid performance
C0610 - RR Shock absorber solenoid performance
C0587–C0592 - Shock absorber damping solenoid circuit faults (all corners)
Will the OBS/SS drain my battery?
No. The OBD/SS turns off 5 seconds after it stops seeing traffic on the CANbus.
Does it have to stay plugged in?
Yes. The OBD/SS must stay plugged in to bypass your magneride.
What if I want to plug in a different device on my OBD2 port?
We offer a OBD2 Port Pass-thru Cable that will allow you to run an additional device.
Does the OBD/SS require a Ride Height Trim procedure?
The OBD/SS does not require a trim procedure! No Scan tool needed.
OBD/SS uses the OE ride height sensors, leave those plugged in and your stock ride height calibration will be read by the OBD/SS. If you are removing the stock ride height sensors because of a lift or lowering kit, we offer ride height simulators.
If I only replace my front struts will my rear struts continue to work?
Yes they will. All previously working components that are still on the vehicle will continue to work.
OBD/SS is intuitive enough to pick up on exactly what is missing, and bypass it.
What if I have Auto Level in the rear?
This applies to 2015 and up Suburban LTZ - Tahoe LTZ - Yukon XL Denali - Yukon Denali with RPO Z95 AND RPO Z85.
If you need/want to keep the Auto Level Functionality, you would use our OBD/SS Module and replace the Rear Shocks with non magnetic AIR Shocks.
With our OBD/SS Installed and Air Shocks in the rear, the Auto level will function as normal.
If your OEM rear magnetic AIR shocks are in good shape and functional, leave them installed on the Truck/SUV. Install our OBD/SS Module and replace the front with your choice of new conventional struts. The rear auto level will function as normal.
If you do NOT need or want to keep the auto level functionality, you would use our OBD/SS Module and replace all four magneride shocks with conventional shocks.
You would then need to bypass the Auto Level air feature by following along to our video linked here -> ALC Bypass Video
Do you plan on towing with your (Tahoe/Suburban) or (Yukon/YukonXL)?
If yes, then retaining the air-ride suspension in the rear would be the best option.
If no, you can replace the rears with non magnetic non air shocks and follow the video in question above to bypass the Auto Level air feature.
What are the Ride Height Simulators For?
If your vehicle is lifted or lowered so that the original ride height sensors are no longer attached then you would need to purchase our Ride Height Simulators along with the OBD/SS Module.
How long does it take to install the OBD/SS Module?
It is a plug and play system taking a few minutes to install. It simply plugs into the OBD2 port.
I have DTCs and my OBD/SS is not powering on anymore! (RAP Fuse)
If the OBD/SS is connected and the Red power light is off then check the SEO RAP Fuse located in the Driver side instrument cluster fuse panel.
For 2015-2020 GMC/Chevrolet SUVs
You are looking for fuse 8 labeled "SEO RAP (10A)"
For the 2015 - 2018 Sierra Denali
You are looking for fuse 2 labeled "SEO RAP (10A)"
My OBD/SS is Powered on but the dash says "Service Leveling System".
If your OBD/SS Red power light is on and your dash says "Service Leveling System", check your rear air system for leaks.
If the rear shocks were removed and replaced with standard rear shocks (ie non-Air shocks), be sure the air lines removed from the OEM air shocks are properly bypassed so the SCM doesn't think there is a leak in the air system. If that is the case, Follow this video.
My OBD/SS is Powered but the dash says "Service Suspension".
If your OBD/SS Red power light is on and your dash says "Service Suspension", check your Ride Height Sensors.
We need to make sure that all four ride height sensors are still connected and showing valid voltages (0.5V-4.5V) to the SCM as the OBD/SS does not handle DTCs related to the ride height sensors.
You can visually inspect the ride height sensor at each corner. If their arms are connected, to the chassis and sensor, and 3 pin connectors are still plugged in they are likely good.
The best way to tell is to read the DTCs from the suspension control module with the OBD/SS unplugged. You will get 4 (or 2 if only replacing the front OR rear shocks) DTCS showing missing shocks. More importantly it will tell you if any ride height sensors are having an issue.