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Body Control Module
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This photo shows a similar part, not the exact one you'll receive. Since each used part has its own wear, yours may look slightly different.

2021 - 2023 Chevrolet Trailblazer Body Control Module (OEM)

Only 2 left in stock
$59.95

⚠️ ELECTRONIC MODULE NOTICE

This module may require programming to your vehicle by a dealer or qualified technician with professional diagnostic equipment.

  • Ships in a sealed inspection bag for visual inspection
  • Returns not accepted if inspection bag has been opened
  • "Needs programming" is not grounds for return
  • If told the module "won't program," contact us before returning
  • Defective units replaced ONLY ONCE, under warranty

ℹ️ Product Notes

This is a used part. It is a keyless control module that helps manage the theft system (ECU). This module may need to be set up (reprogrammed) by a mechanic to work with your vehicle.

This module requires professional programming to work. Please match your original part number exactly before ordering.

Original Part #(s): 13518765, 13518770, 13518835, 13518836, 13518841, 13558723
Condition: Excellent (A)
Like new, minimal to no wear
5,884 miles
Odometer reading when part was removed
SKU #
3968113-10821-195

Why Buy Used OEM Parts?

✓ 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:

Chevrolet
Trailblazer 2021-2023 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
ACTIV SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT
L SUV 2021 - 2022 L3 1.2L Turbo FWD | Automatic CVT
LS SUV 2021 - 2023 L3 1.2L Turbo AWD/FWD | Automatic & Automatic CVT
LS SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT
LT SUV 2021 - 2023 L3 1.2L Turbo AWD/FWD | Automatic & Automatic CVT
LT SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT
RS SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT

⚠️ 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.

Policies

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

Is your car acting strange? A failing Body Control Module (BCM) could be the problem. This part controls many of your car's electrical systems. Here's how to tell if yours is going bad:

  • Warning Signs:
  • Interior lights not working correctly
  • Power windows or door locks failing
  • Radio or infotainment system problems
  • Security system malfunctions
  • Issues with wipers, turn signals, or headlights
  • Car not starting or stalling
  • Testing the BCM:
  • Start by checking the car's battery and fuses. A weak battery or blown fuse can cause similar problems.
  • Use a scan tool to check for diagnostic trouble codes (DTCs) related to the BCM.
  • Inspect the wiring harness and connectors for damage or corrosion.
  • If possible, swap the BCM with a known good one to see if the problems go away. This should be done by a professional.
  • Common Failure Causes:
  • Electrical surges or shorts
  • Water damage or corrosion
  • Overheating
  • Physical damage from accidents
  • Normal wear and tear over time

Buyer's Checklist

Buying a replacement BCM can be tricky. Here's what to look for:

  • What to Look For:
  • Make sure the part is compatible with your car's year, make, and model.
  • Check the part's condition. Look for any signs of damage or corrosion.
  • Ask about the seller's warranty or return policy.
  • Quality Indicators:
FeatureUsed OEMNew Aftermarket
OriginOriginal factory partThird-party manufacturer
TestingTypically tested before resaleAssumed to be functional, check warranty
FitmentGuaranteed to fit your vehicleDesigned to fit, but may require adjustments
PriceGenerally lowerCan vary, sometimes higher than used OEM
  • What's Included:
  • The BCM itself.
  • Sometimes, installation instructions (though these are often generic).
  • Check if programming is required. Some BCMs need to be programmed to your specific vehicle.

Installation Overview

Replacing a BCM can range from simple to complex.

  • Difficulty Level and Estimated Time:
  • Difficulty: Medium to High
  • Estimated Time: 1-3 hours
  • Special Tools Needed:
  • Basic hand tools (sockets, wrenches, screwdrivers)
  • Scan tool for clearing codes and possibly programming the new BCM
  • Multimeter for testing electrical connections
  • Critical Steps and Tips:
  1. Disconnect the negative battery cable.
  2. Locate the BCM (usually under the dashboard or in the center console).
  3. Disconnect the wiring harness connectors.
  4. Remove the old BCM.
  5. Install the new BCM.
  6. Reconnect the wiring harness connectors.
  7. Reconnect the negative battery cable.
  8. Use a scan tool to clear any diagnostic trouble codes (DTCs).
  9. Program the new BCM if required.
  • DIY or Professional Installation:
  • DIY is possible if you have experience with automotive electrical systems and a scan tool.
  • Professional installation is recommended if you're not comfortable working with electrical systems or if the BCM needs to be programmed.

Buying Options

You have a couple of choices when buying a replacement BCM:

  • Used OEM:
  • These are original factory parts that have been removed from other vehicles.
  • They offer the best value because they're genuine parts that have been tested and inspected, but cost less than new parts.
  • New Aftermarket:
  • These are brand new parts made by third-party manufacturers.
  • They're built to meet or exceed original equipment (OE) specifications.
FeatureUsed OEMNew Aftermarket
PriceLowerCan vary, sometimes higher than used OEM
QualityGenuine factory partMay vary by manufacturer
WarrantyTypically shorter than new partsVaries by manufacturer
AvailabilityCan be limitedGenerally readily available

Typical Lifespan

A BCM typically lasts for:

  • Lifespan: 10-15 years or more.

Factors that can affect its longevity:

  • Environmental Conditions: Extreme temperatures and humidity can shorten its lifespan.
  • Electrical Problems: Surges, shorts, and other electrical issues can damage the BCM.
  • Water Damage: Water intrusion can cause corrosion and failure.

Price Ranges

The cost of a replacement BCM can vary:

  • Used OEM: $50 - $200
  • New Aftermarket: $100 - $300

Labor costs for installation can range from $100 to $300, depending on the shop and the complexity of the job.

  • Total Job Cost Estimate:
  • Used OEM: $150 - $500
  • New Aftermarket: $200 - $600

Vehicle-Specific Notes

Some 2018-2024 Buick, Cadillac, Chevrolet, and GMC vehicles have known issues related to the BCM:

  • Some models have experienced problems with the BCM causing intermittent electrical issues, such as lights flickering or the radio cutting out.
  • Check for any Technical Service Bulletins (TSBs) related to the BCM on your specific vehicle. These TSBs may provide information on common problems and solutions.
  • Some owners have reported that the BCM can be sensitive to voltage fluctuations, so it's important to ensure that the battery and charging system are in good condition.

Verification After Install

After installing the new BCM:

  • Confirm Proper Operation:
  • Check all the electrical systems that the BCM controls, such as the lights, windows, door locks, and radio.
  • Make sure all the systems are working correctly.
  • What to Look/Listen For:
  • No error messages or warning lights on the dashboard.
  • All electrical systems functioning smoothly and reliably.
  • No unusual noises or behavior from the car's electrical components.

FAQ

Q: Will this BCM need to be programmed to my car?
A: It depends. Some BCMs are plug-and-play, while others need to be programmed to your specific vehicle using a scan tool. Check with the seller or a qualified mechanic to be sure.

Q: How do I know if the BCM is really the problem?
A: Have a qualified mechanic diagnose the problem. They can use a scan tool and other diagnostic equipment to pinpoint the source of the issue.

Q: What happens if I install the BCM incorrectly?
A: Installing the BCM incorrectly can damage the part or your car's electrical system. It's best to have a professional install it if you're not comfortable doing it yourself.

Q: Is a used OEM BCM reliable?
A: Yes, used OEM BCMs can be reliable. They are genuine factory parts that have been tested and inspected. Plus, they're more affordable than new parts.

Q: What kind of warranty comes with a used BCM?
A: Warranty varies by seller. Check the seller's warranty policy before you buy.

Part Specifications

OEM Part Numbers:

  • GM: 13518765, 13518770, 13518835, 13518836, 13518841, 13558723

Fits Years: 2021 2022 2023

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