The BCM or body control module is an electronic control unit responsible for monitoring and controlling various electronic accessories in a vehicle’s body. The Body Control Module controls many things that are not directly related to the engine such as headlights, windows, alarm system and the control the door locks. A body control module is almost always specifically programmed to work with a specific car and must be reprogrammed when replaced.

Possible Symptoms:

– Interior electrical problems such as radio locked, security light on, no interior lights, air bag light on
– Car alarm goes off by by itself randomly
– Problems locking and unlocking doors
– Engine failure to start

Difficulty: Easy

Programming: Requires reprogramming from GM dealership.


The Body Control Module Controls:

Power Locks
Cruise Control
Power Windows
Automatic Headlamps
Anti-Theft System (VATS/Passlock)
Door lock out protection
Courtesy Lights
Interior light Dimming
Remote Start (If equipped)
RAP (Retained Aux Power)
Daytime Running Lamps
Turn Signals
Hazard Lights
Factory Alarm
Windshield Wipers

The BCM also talks to the PCM, RBCM, Airbag Control Module, and the Factory radio.

IMG 1986 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal Replacement

Part Interchange:

2006 Chevrolet Impala
2007 Chevrolet Impala
2008 Chevrolet Impala
2009 Chevrolet Impala
2010 Chevrolet Impala
2011 Chevrolet Impala
2012 Chevrolet Impala

Interchanges Part Numbers:

10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763

Part Location:

The BCM or body control module on the 2006-2012 Chevrolet Impala is located on the underside of the dash on the driver side of the vehicle.

IMG 1975 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal Replacement

Once your in the floorboard area, look up and to the left and you’ll see the BCM.


It’s a glossy black box that is held in place with two plastic clips.

IMG 1976 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal ReplacementIMG 1981 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal Replacement

The BCM on this Impala uses seven electrical plugs that are green, white, blue, black, brown, pink and gray.

IMG 1983 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal ReplacementIMG 1987 336x252 06 12 Chevrolet Impala Body Control Module BCM BCU Location Removal Replacement

The BCM commonly fails because of shock, excessive heat, mechanical wear, water logging or vibration.