Where is the BCM on a 2005 Chevy Colorado?

The Body Control Module (BCM) in a 2005 Chevy Colorado is located inside the cabin, typically mounted under the dash on the driver’s side knee area or behind the glove box on the passenger side. Exact placement can vary by trim and production batch, so it’s worth checking both locations if you’re tracing electrical issues.

Common BCM locations in the 2005 Colorado

Most 2005 Colorado BCMs are installed in one of two interior locations. The following describes where to look and how to access each spot.

• Behind the glove box on the passenger side of the dash. If you remove the glove box and the surrounding panel, you may locate a rectangular module with multiple wiring harness plugs labeled BCM or with a GM electrical module cover.


• Under the driver’s side dash, in the knee-bolster area. A lower dash panel or kick panel removal may expose a small module mounted near the steering column or fuse/relay area.

Note that some early-2005 Colorado models or builds destined for different markets may place the BCM closer to the center of the dash or fuse block, so it pays to inspect both locations and verify by the connector shape and labeling.

How to safely locate and access the BCM

To identify the BCM and prepare for inspection or replacement, follow these steps carefully. Before starting, ensure you have the right tools and safety precautions in place.

1. Disconnect the negative battery terminal to prevent shorts or accidental air-bag deployment. Wait a few minutes for voltage to drop.


2. Remove the interior panels that obstruct access to the BCM area. This usually means lowering the glove box or removing a kick-panel or lower dash cover on the driver’s side.


3. Look for a rectangular module with multiple wiring harness connectors. The BCM itself is often labeled and sits near the fuses/relays or behind a trim plate.


4. Inspect the harness connectors for corrosion, bent pins, or loose connections. If you see damage, handle with care and replace if necessary.


5. Reinstall panels, reconnect the battery, and test each affected system to verify if the BCM is functioning properly.

If you’re replacing the BCM, note that many units require programming or a dealer/locksmith to pair the module with the vehicle’s immobilizer and other modules. Check your VIN and part number to ensure compatibility and plan for potential programming fees.

BCM replacement considerations

Not all BCM issues require replacement. Sometimes a bad connector or ground, blown fuse, or software fault can mimic a BCM failure. Before buying a new BCM, consider running a code scan and checking the related circuits, grounds, and fuses.

When replacement is necessary

If diagnosis points to a faulty BCM and no other fault is found, replacement is often the remedy. Ensure you obtain the exact part for your truck's VIN and build and arrange for proper programming to avoid immobilizer lockouts.

After replacement, recheck the systems and retest all affected functions (lighting, windows, door locks, etc.) to confirm proper operation.

Summary

The BCM in a 2005 Chevy Colorado is situated inside the interior—most commonly under the driver’s dash near the knee area or behind the passenger-side glove box. Access typically involves removing a small dash panel or the glove box, and any replacement often requires proper programming. With careful diagnosis and correct part selection, you can locate and service the BCM without unnecessary damage to the vehicle.

Where is the BCM on a 2005 Colorado?

The Body Control Module (BCM) in a 2005 Chevy Colorado is typically located under the dashboard on the driver's side, near the steering column. Symptoms of a faulty BCM include flickering lights, malfunctioning power accessories, or erratic electrical behavior.

How to reset BCM on Chevy Colorado?

To perform a Chevy Colorado BCM reset, you can use a simple battery disconnect method: turn the vehicle off, disconnect the negative battery cable, press the brake pedal for about 15 seconds to drain residual power, wait 15-30 minutes, and then reconnect the positive and negative cables in that order. If you have an OBDII tool that supports BCM resets, that is an alternative option, but the battery disconnect is a basic method that can resolve minor glitches. 
Method 1: Battery disconnect
This is the most common way to reset a BCM and can fix minor glitches. 
You can watch this video to learn how to reset a Chevy BCM by disconnecting the battery: 58sSimple Mechanic AdviceYouTube · Oct 31, 2024

1. Note radio presets, as they will be lost during the reset. 
2. Turn the vehicle off: and remove the key from the ignition. 
3. Disconnect the negative battery cable: first, then the positive cable. 
4. Press the brake pedal: for about 15 seconds to drain any remaining power from the electrical system. 
5. Wait for at least 15 to 30 minutes: to ensure the BCM is fully reset. 
6. Reconnect the positive battery cable first, then the negative cable. 
7. Start the vehicle: and test the electrical systems to see if the issue is resolved. 

Method 2: Using an OBDII diagnostic tool
Some advanced OBDII scanners can perform a BCM reset. 

1. Connect the scanner: to your Chevy Colorado's OBDII port.
2. Navigate the tool's menu: to find the "BCM Reset" function.
3. Follow the on-screen prompts: to perform the reset.
4. Consult the tool's manual: for specific instructions for your vehicle model.

Important considerations

• This information is for basic resets. If the problem persists, consult a professional, as the BCM may be faulty and require replacement. 
• The BCM controls many electrical functions, so a reset is often done to fix minor glitches in systems like lighting or door locks. 
• If the reset doesn't work, the issue may be caused by a faulty BCM, a bad ground, or corroded connectors, which will require further diagnosis and repair. 

Where is the BCM module located?

The body control module (BCM) is typically located underneath the dashboard, often on the driver's side near the center console or to the left of the brake pedal. Other possible locations include the center console itself or the engine compartment, and the exact position can vary by vehicle model.
 
This video shows the location of the BCM in a Chevy Malibu: 1mCrowtown AutoYouTube · Nov 13, 2023

• Under the dashboard: This is the most common location, found on the driver's side and near the center console, making it convenient to access the cabin switches.
• Other locations: In some vehicles, you may find it in the center console or within the engine compartment.
• Consult your vehicle's manual: Because the location varies, it is best to consult your car's owner's manual or a repair guide for your specific make and model for the most accurate information. 

How do I tell if my BCM is bad?

And the circuits it controls. But the most common code that I've seen when the BCM. Goes bad is the U0140. Code which basically means there's no communication to the BCM.