OEM Differential Control Module for 2018-2024 Buick, Cadillac, Chevrolet, & GMC - Rear
Only 1 left in stock
$99.95
ℹ️ Product Notes
This is a used part. It is a control module for the chassis. This module manages the rear differential.
This part needs to be programmed by a dealer or shop. It only fits AWD models with a locking rear differential. Match your old part number before you buy.
✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested to ensure it meets our quality standards. While it may show some cosmetic wear from previous use, it's fully functional and ready to install.
✓ Original Equipment: This is a genuine OEM (Original Equipment Manufacturer) part - the exact same part that came with your vehicle from the factory. It's designed specifically for your make and model, ensuring perfect fitment and performance.
✓ Works Like New: Despite some visual wear, this part will perform just as well as a brand new one. The internal components and functionality are intact, giving you the same reliability you'd expect from OEM quality.
✓ Significant Savings: Save 50-80% compared to buying new! Used OEM parts offer exceptional value - you get factory quality at a fraction of the cost. It's the smart choice for budget-conscious vehicle owners who won't compromise on quality.
✓ Risk-Free Purchase: We stand behind our used parts with a generous 6-month warranty, 30-day returns, and 100% money-back guarantee. If it doesn't work out for any reason, simply return it for a full refund. You have nothing to lose!
🛡️ 30-Day Returns + 6-Month Warranty - Buy with Confidence!
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Vehicle Fitment Guide
This part fits the following vehicles:
Active Filters:
⚠️ No Matching Vehicles Found
This part does not fit the vehicle specifications you selected. Please try adjusting your filter criteria or to see all compatible vehicles.
Buick1 model(tapclick to expand)(tapclick to hide)
LaCrosse2018-2019(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Avenir
Sedan
2018 - 2019
V6 3.6L
AWD | Automatic
Essence
Sedan
2018 - 2019
L4 2.5L MILD HYBRID EV-GAS (MHEV)
AWD | Automatic
Essence
Sedan
2018 - 2019
V6 3.6L
AWD | Automatic
Premium
Sedan
2018 - 2019
L4 2.5L MILD HYBRID EV-GAS (MHEV)
AWD | Automatic
Premium
Sedan
2018 - 2019
V6 3.6L
AWD | Automatic
Cadillac2 models(tapclick to expand)(tapclick to hide)
CT42020(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Luxury
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Premium Luxury
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Premium Luxury
Sedan
2020
L4 2.7L Turbo
AWD | Automatic | Mounts on the rear differential.
Sport
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
V
Sedan
2020
L4 2.7L Turbo
AWD | Automatic | Mounts on the rear differential.
CT52020(tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Luxury
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Premium Luxury
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Premium Luxury
Sedan
2020
V6 3.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Sport
Sedan
2020
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
V
Sedan
2020
V6 3.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Chevrolet2 models(tapclick to expand)(tapclick to hide)
Blazer2019-2022(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Base
SUV
2019
L4 2.5L
AWD | Automatic | Mounts on the rear differential.
Base
SUV
2019
V6 3.6L
AWD | Automatic | Mounts on the rear differential.
Premier
SUV
2019 - 2022
V6 3.6L
AWD | Automatic | Mounts on the rear differential.
RS
SUV
2019 - 2022
V6 3.6L
AWD | Automatic | Mounts on the rear differential.
True North
SUV
2019 - 2022
V6 3.6L
AWD | Automatic | Mounts on the rear differential.
LT
SUV
2020 - 2022
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
LT
SUV
2020 - 2022
L4 2.5L
AWD | Automatic | Mounts on the rear differential.
LT
SUV
2020 - 2022
V6 3.6L
AWD | Automatic | Mounts on the rear differential.
Premier
SUV
2021 - 2022
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
True North
SUV
2021
L4 2.0L Turbo
AWD | Automatic | Mounts on the rear differential.
Traverse2024(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Z71
SUV
2024
L4 2.5L Turbo
AWD | Automatic | Mounts on the driveline tube. Fits 'Classic' style for 2024 models.
GMC2 models(tapclick to expand)(tapclick to hide)
Acadia2018-2022(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
Denali
SUV
2018 - 2022
V6 3.6L
AWD | Automatic | Mounts on top of the differential carrier.
SLT
SUV
2018
V6 3.6L
AWD | Automatic | Mounts on top of the differential carrier.
All Terrain
SUV
2019
V6 3.6L
AWD | Automatic | Mounts on top of the differential carrier.
AT4
SUV
2020 - 2022
V6 3.6L
AWD | Automatic | Mounts on top of the differential carrier.
Black
SUV
2021
V6 3.6L
AWD | Automatic | Mounts on top of the differential carrier.
Terrain2022(tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
AT4
SUV
2022
L4 1.5L Turbo
AWD | Automatic | Mounts on the carrier housing.
⚠️ Important: Please verify your vehicle's year, make, model, and specifications before ordering. If you're unsure about fitment, contact our customer service team for assistance.
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Shipping & Handling
Standard shipping: 3-7 business days via UPS Ground
Parts are carefully packaged to prevent damage during transit
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
Defective parts: We will replace the part or issue a refund at our discretion
Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
Return shipping: We cover return shipping as part of our 100% money-back guarantee
Parts must be returned in original packaging and unmodified condition
Poorly packaged returns that arrive damaged will not be credited
6-Month Warranty
All used parts include a 6-month warranty from the date of purchase.
If your part fails within 6 months, we will send a replacement
Refunds are only issued if we cannot provide a suitable replacement
Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.
Damaged in Shipping?
If your part arrives damaged:
Stop immediately — do not install the part
Keep all original packaging and boxes
Take clear photos of the damage and packaging
Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Symptoms & Diagnosis
Warning Signs the Differential Control Module is Failing
Unusual noises from the rear of the vehicle, like clunking or grinding
Difficulty turning, especially at low speeds
The vehicle feels unstable or pulls to one side
Warning lights on the dashboard related to the differential or traction control system
Reduced traction or loss of control in slippery conditions
How to Test if This Part is the Problem
Start by checking the fluid level and condition in the rear differential. Low or dirty fluid can cause similar symptoms.
Use a diagnostic scan tool to check for any trouble codes related to the differential control module or the rear differential.
Inspect the wiring and connectors to the differential control module for any damage or corrosion.
If possible, use a multimeter to check the voltage and ground connections to the module.
A qualified mechanic can use specialized diagnostic equipment to test the module's functionality and communication with other vehicle systems.
Common Failure Causes for This Part
Water or moisture damage to the module
Electrical surges or shorts in the vehicle's wiring
Physical damage from impacts or accidents
Normal wear and tear over time
Corrosion of electrical connections
Buyer's Checklist
What to Look for When Buying This Part
Check the part's appearance for any signs of damage or corrosion.
Verify the part is the correct type for your vehicle's rear differential.
Ensure the part comes with any necessary hardware or connectors.
Look for a warranty or guarantee from the seller.
Quality Indicators for the Available Options
| Feature | Used OEM 0
What's Typically Included with the Part
The differential control module itself
Any necessary mounting hardware
Wiring harness connectors (if applicable)
Installation Overview
Difficulty Level and Estimated Time
Intermediate to Advanced
Estimated time: 1-3 hours
Special Tools Needed (if any)
Set of wrenches and sockets
Screwdrivers
Diagnostic scan tool
Multimeter
Torque wrench
Critical Steps and Tips
Disconnect the negative battery cable before starting any work.
Locate the differential control module, usually near the rear differential.
Disconnect the wiring harness connectors from the module.
Remove the mounting bolts or screws securing the module.
Install the new module and reconnect the wiring harness connectors.
Torque the mounting bolts to the manufacturer's specifications.
Reconnect the negative battery cable.
Use a diagnostic scan tool to clear any trouble codes and perform any necessary programming or calibration.
Whether DIY is Recommended or Professional Installation is Better
Due to the complexity of the electronic systems and potential need for programming, professional installation is recommended.
Buying Options
Compare: Used OEM, New Aftermarket
| Feature | Used OEM
Used OEM:
Genuine factory part
Tested and inspected
Significantly lower price
New Aftermarket:
Brand new
Third-party manufactured
Built to OE specifications
Related Parts
Wheel speed sensors
ABS control module
Wiring harness
Rear differential fluid
Why Replacing Related Parts Prevents Repeat Failures
Replacing worn or damaged related parts ensures the entire system functions correctly and prevents premature failure of the new differential control module. For example, a faulty wheel speed sensor can send incorrect signals to the module, causing it to malfunction.
Typical Lifespan
The differential control module typically lasts 7-10 years or 100,000-150,000 miles.
Electrical system health (battery voltage, wiring condition)
Exposure to moisture or corrosion
Price Ranges
Used OEM: $150 - $400
New Aftermarket: $250 - $600
Labor cost: $100 - $300
Total job cost estimate: $250 - $900
Vehicle-Specific Notes
Some models may experience issues with the differential control module due to water intrusion. Check for any signs of corrosion or water damage.
There may be Technical Service Bulletins (TSBs) related to software updates for the differential control module. Consult with a qualified mechanic or dealership for the latest information.
Some owners have reported issues with the electronic limited-slip differential (eLSD) system, which is controlled by this module.
Verification After Install
How to Confirm Proper Operation
Use a diagnostic scan tool to verify that there are no trouble codes related to the differential control module.
Perform a test drive to check for any unusual noises or vibrations from the rear of the vehicle.
Monitor the vehicle's traction control system in various driving conditions to ensure it is functioning correctly.
What to Look/Listen for to Verify It's Working Correctly
Smooth and consistent power delivery to the rear wheels
Proper engagement and disengagement of the electronic limited-slip differential (if equipped)
No unusual noises or vibrations from the rear differential
No warning lights on the dashboard
FAQ
Q: How do I know if my differential control module is bad?
A: Common signs include unusual noises from the rear, difficulty turning, warning lights on the dash, and reduced traction.
Q: Can I replace the differential control module myself?
A: It is recommended to have a professional install the module due to the complexity of the system and the need for programming.
Q: Will a used differential control module work on my vehicle?
A: Yes, a used OEM module can work, but make sure it's the correct part for your vehicle and that it has been tested.
Q: Do I need to program the new differential control module?
A: Yes, programming or calibration may be required to ensure the module communicates correctly with other vehicle systems.
Q: What happens if I don't replace a bad differential control module?
A: Failure to replace a faulty module can lead to reduced traction, difficulty turning, and potential damage to the rear differential.
Part Specifications
OEM Part Numbers:
GM: 84207916, 84440525, 84880473
Fits Years:2018 2019 2020 2021 2022 2023 2024
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