| Summary | |||
|---|---|---|---|
| Year: | 2021change | ||
| Make: | Chevroletchange | ||
| Model: | Trailblazerchange | ||
| Sub Models: | Basechange | ||
| Item: | Chassis Computer | ||
| Condition: | OEM Used | ||
| Items Available: | 7 | ||
| Price Range: | $76 - $154 (before local discount) | ||
| Local Discount: | Up to $100.00 | ||
| Returns: |
Cancellation & Return Policy | ||
| Item: | Chassis Computer change |
| Condition: | OEM Usedchange |
| Items Available: | 7 |
| Price Range: | $76 - $154 (before local discount) |
| Local Discount: | Up to $100.00 |
Quality Tested Parts
Nationwide Shipping
1-year warranty
Low Price Guarantee
30-Day Free ReturnsSelect the right Chassis Computer for your 2021 Chevrolet Trailblazer
This part may have multiple fitment options depending on your vehicle's engine, drivetrain, and configuration. To ensure proper compatibility, please select the correct fitment below. If you’re unsure, we strongly recommend checking your VIN or vehicle build details before ordering. You can update or change the fitment selection at any time.
Chassis Computer - Air Bag air bag (below console)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Air Bag air bag (below console)
Items in stock: 690
Items in stock: 690
Chassis Computer - Air Bag occupant detection (below passenger seat)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Air Bag occupant detection (below passenger seat)
Items in stock: 60
Items in stock: 60
Chassis Computer - Body Control (BCM) (below center console)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Body Control (BCM) (below center console)
Items in stock: 2839
Items in stock: 2839
Chassis Computer - Communication telematics (OnStar, opt UE1) ID 84676081
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Communication telematics (OnStar, opt UE1) ID 84676081
Items in stock: 549
Items in stock: 549
Chassis Computer - Communication telematics (OnStar, opt UE1) ID 84979014
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Communication telematics (OnStar, opt UE1) ID 84979014
Items in stock: 212
Items in stock: 212
Chassis Computer - Communication wireless charger (under console)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Communication wireless charger (under console)
Items in stock: 273
Items in stock: 273
Chassis Computer - Differential Lock (rear differential)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Differential Lock (rear differential)
Items in stock: 4
Items in stock: 4
Chassis Computer - Driver Side Assist park assist (inner Passenger Side quarter panel) automatic park control (opt UKG)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Driver Side Assist park assist (inner Passenger Side quarter panel) automatic park control (opt UKG)
Items in stock: 9
Items in stock: 9
Chassis Computer - Driver Side Assist park assist (inner Passenger Side quarter panel) park assist (opt UD7)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Driver Side Assist park assist (inner Passenger Side quarter panel) park assist (opt UD7)
Items in stock: 123
Items in stock: 123
Chassis Computer - Driver Side Assist surround view (opt UV2) (left hand inner quarter panel) ID 84863042
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Driver Side Assist surround view (opt UV2) (left hand inner quarter panel) ID 84863042
Items in stock: 2
Items in stock: 2
Chassis Computer - Driver Side Assist surround view (opt UV2) (left hand inner quarter panel) ID 86778385
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Driver Side Assist surround view (opt UV2) (left hand inner quarter panel) ID 86778385
Items in stock: 1
Items in stock: 1
Chassis Computer - Memory (under Driver Side seat)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Memory (under Driver Side seat)
Items in stock: 1471
Items in stock: 1471
Chassis Computer - Network Gateway (left hand floor)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Network Gateway (left hand floor)
Items in stock: 679
Items in stock: 679
Chassis Computer - Theft-Locking keyless entry (engine compartment) ID 13518840
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Theft-Locking keyless entry (engine compartment) ID 13518840
Items in stock: 22
Items in stock: 22
Chassis Computer - Theft-Locking keyless entry (engine compartment) ID 13518843
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Theft-Locking keyless entry (engine compartment) ID 13518843
Items in stock: 464
Items in stock: 464
Chassis Computer - Theft-Locking lock (left hand outside mirror)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Theft-Locking lock (left hand outside mirror)
Items in stock: 1112
Items in stock: 1112
Chassis Computer - Theft-Locking theft deterrent (floor console)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Theft-Locking theft deterrent (floor console)
Items in stock: 345
Items in stock: 345
Chassis Computer - Transmission 9 speed (Automatic Transmission)
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Transmission 9 speed (Automatic Transmission)
Items in stock: 749
Items in stock: 749
Chassis Computer - Transmission CVT
Select Fitment
This fitment option is for 2021 Chevrolet Trailblazer,
select this option for
Transmission CVT
Items in stock: 470
Items in stock: 470
Interchange Fitment FAQs
A: All Chassis Computer options shown on this page are matched to your selected configuration:
2021 Chevrolet Trailblazer.
Used OEM parts are dismantled from donor vehicles as complete assemblies, and a specific interchange fitment is assigned during this process.
Every detail shown in the fitment notes must match your vehicle exactly.
A: An interchange fitment option defines the exact donor vehicle configuration your part came from. For 2021 Chevrolet Trailblazer, this may include engine size, VIN code,
transmission model, drivetrain, axle ratio, and other critical identifiers. This data comes from VIN decoding, OEM information, and
physical inspection of the donor vehicle.
A: Used OEM parts are not universal. If any fitment detail for your 2021 Chevrolet Trailblazer differs from what is shown in the fitment notes,
the Chassis Computer may not install, communicate with your vehicle, or function correctly. Always verify all fitment details before ordering.
A: Fitment information is captured when the donor vehicle is dismantled.
The yard decodes the VIN for 2021 Chevrolet Trailblazer, checks OEM data and interchange databases,
and verifies details during physical inspection. The resulting fitment is then assigned to the Chassis Computer assembly.
A: Many 2021 Chevrolet Trailblazer vehicles were built with multiple configurations in the same year and trim. Trim name alone (XLT, Limited, Sport, etc.) is not enough.
You must match the exact configuration shown in the fitment notes—such as engine size, transmission type, drivetrain, and axle ratio—before selecting a Chassis Computer.
A: You can find the VIN for your 2021 Chevrolet Trailblazer on
the driver-side dashboard (visible through the windshield), inside the driver-side door jamb, and on your registration or insurance documents.
The VIN helps confirm the correct configuration and fitment.
A: Yes. Trim levels on your 2021 Chevrolet Trailblazer can affect electronics, sensors, body parts, and interior components. Always match the detailed fitment notes for your configuration,
not just the trim name, before selecting a Chassis Computer.
Enter your Zip Code below to find parts near you. The more local you shop, the more you save off the original sale price!
Attention!
There are 19 Chassis Computer choices for the
Verify Your Part
Chassis Computer (7)
- Air Bag
- air bag (below console) (690/7)
- occupant detection (below passenger seat) (60/7)
- Body Control (BCM)
- (below center console) (2839/7)
- Communication
- telematics (OnStar, opt UE1)
- ID 84676081 (549/7)
- ID 84979014 (212/7)
- wireless charger
- (under console) (273/7)
- telematics (OnStar, opt UE1)
- Differential Lock
- (rear differential) (4/7)
- Driver Side Assist
- park assist
- (inner Passenger Side quarter panel)
- automatic park control (opt UKG) (9/7)
- park assist (opt UD7) (123/7)
- (inner Passenger Side quarter panel)
- surround view (opt UV2)
- (left hand inner quarter panel)
- ID 84863042 (2/7)
- ID 86778385 (1/7)
- (left hand inner quarter panel)
- park assist
- Memory
- (under Driver Side seat) (1471/7)
- Network Gateway
- (left hand floor) (679/7)
- Theft-Locking
- keyless entry (engine compartment)
- ID 13518840 (22/7)
- ID 13518843 (464/7)
- lock (left hand outside mirror) (1112/7)
- theft deterrent (floor console) (345/7)
- keyless entry (engine compartment)
- Transmission
- 9 speed (Automatic Transmission) (749/7)
- CVT (470/7)
Available Parts
- A/C Control (7)
- Air Flow Meter/Sensor (-)
- Alternator (104)
- Chassis Computer (7)
- Combination Switch (-)
- Convertible Top Lift (-)
- Convertible Top Motor (-)
- DC Converter (Electric Car) (-)
- Distributor (-)
- Electric Door Motor (-)
- Engine Computer/Control Unit (2)
- Fuse Box (202)
- Headlight/Headlamp Motor (-)
- Heater Motor (1)
- Ignition Coil (-)
- Ignition Switch W/Key (850)
- Power Window Motor (-)
- Power Window Switch (-)
- Quarter Window Motor (-)
- Starter (169)
- Sun Roof Motor (-)
- Tailgate Lift Motor (-)
- Tailgate Motor (-)
- Windshield Washer Motor (-)
- Wiper Motor, Front (1)
- Wiper Motor, Rear (-)
- Wiper Transmission (-)
- A Pillar (-)
- Back Window (-)
- Bed Rail (-)
- Bumper Assembly, Front (-)
- Bumper Assembly, Rear (1)
- Bumper Bar, Front (-)
- Bumper Bar, Rear (-)
- Bumper Cover, Front (-)
- Bumper Cover, Rear (-)
- Cab Corner (-)
- Door Assembly, Back (-)
- Door Assembly, Front (1)
- Door Assembly, Rear (4)
- Door Handle, Rear (-)
- Door Latch, Rear (-)
- Door Mirror, Side (10)
- Door Trim Panel, Front (-)
- Door Vent Glass, Front (-)
- Door Window, Front (-)
- Door Window, Rear (1)
- Fender (3)
- Front Clip (-)
- Fuel Tank (-)
- Grille (-)
- Ground Effects (-)
- Header Panel (-)
- Headlight/Headlamp Door (-)
- Hood (-)
- Pillar (8)
- Quarter Panel (8)
- Quarter Window (-)
- Quarter Window Regulator, Rear (-)
- Radiator Support (-)
- Rear Clip Assembly (-)
- Rear Fender Assembly (-)
- Rear Trim Panel (-)
- Rear Vent Window (-)
- Roof (2)
- Roof Glass (-)
- Running Board (-)
- Tail Finish Panel (-)
- Tail Panel (-)
- Tailgate Assembly (3)
- Tires (1)
- Tires, Set (-)
- Tonneau Cover (-)
- Truck Bed (-)
- Truck Cab (-)
- Trunk Lid Pull Down (-)
- Valance, Front (-)
- Wheel Cover (-)
- Wheel Rim (374)
- Windshield Glass (-)
- Air Bag (11)
- Armrest (-)
- Cargo Cover (-)
- Console (8)
- Cruise Control Servo (-)
- Dash Assembly (-)
- Dash Panel (-)
- Gas Pedal (-)
- Glove Box (4)
- GPS / Info Screen (3)
- Head Up Display (-)
- Headrest (-)
- Inside Door Handle (-)
- Instrument Cluster (-)
- Interior, Complete (-)
- Jack Assembly (5)
- Night Vision Camera (10)
- Overhead Console (-)
- Radio / CD Player (507)
- Rear View Mirror (6546)
- Roof Rack (-)
- Seat Track, Front (-)
- Seat, Front (343)
- Seat, Rear (5)
- Seat, Third Row (-)
- Seatbelt (-)
- Shift Lever (5)
- Speedometer (5)
- Steering Wheel (1)
- Sun Visor (440)
- Trailer Hitch (-)
- ABS Control Module/Pump (112)
- Air Injection Pump (-)
- Air Spring (-)
- Axle Carrier, Rear (103)
- Axle Housing (-)
- Axle Shaft (14)
- Axle, Front (-)
- Axle, Rear (-)
- Back Axle (147)
- Brake Master Cylinder (-)
- Bumper Shock (-)
- Cab Clip (-)
- Camshaft (-)
- Cylinder Head (-)
- Differential Assembly, Rear (-)
- Drive Shaft, Front (-)
- Drive Shaft, Rear (63)
- Engine Oil Cooler (-)
- Engine Pullout (-)
- Exhaust Manifold (-)
- Flywheel (37)
- Frame (-)
- Fuel Pump (-)
- Harmonic Balancer (-)
- Hub Bearing (-)
- I Beam (-)
- Intake Manifold (-)
- Leaf Spring, Front (-)
- Leaf Spring, Rear (-)
- Lower Control Arm, Front (5)
- Lower Control Arm, Rear (-)
- Muffler (-)
- Oil Pan (-)
- Power Brake Booster (-)
- Power Steering Pump (-)
- Radiator Overflow Bottle (-)
- Ring Gear And Pinion (-)
- Shock Absorber (-)
- Shock, Front (7)
- Shock, Rear (-)
- Spindle (6)
- Spoiler, Rear (-)
- Steering Column (2)
- Steering Gear (4)
- Strut (6)
- Stub Axle, Rear (-)
- Suspension Compressor (-)
- Suspension Cross Member (136)
- Throttle Body (118)
- Timing Cover (-)
- Torque Converter (-)
- Torsion Bar (-)
- Transfer Case Assembly (68)
- Transfer Case Motor (2)
- Transmission Cooler (-)
- Turbo (119)
- Upper Control Arm, Front (-)
- Upper Control Arm, Rear (-)
- Vacuum Pump (1)
- Valve Cover (-)
- Water Pump (-)
- Window Regulator, Front (1)
- Window Regulator, Rear (1)
