How do you troubleshoot a BCM?

How to Troubleshoot a Body Control Module

Pay attention to your vehicle.
Check to make sure all the electronic devices are working properly.
Turn the radio and CD player on.
Check the fuse box if you suspect that your vehicle’s BCM is on the blink.

What is a BCM issue?

A malfunctioning BCM will activate dashboard instrumentation cluster error and warning lights. These lights may flash off and on if the BCM is not able to read the sensors correctly. Your vehicle performance may also be affected as the BCM communicates with other control modules in the vehicle.

Where is the TCM on a Silverado Sierra?

MIKE91B wrote: Swapping modules won’t help you and will most likely cause you more troubles you don’t want. Fuse 14 in the under hood junction block should be the TCM, it is a 15 amp fuse, make sure it is hot.

What are the symptoms of a failing BCM?

5 Common Symptoms of a Failing Body Control Module (BCM) 1 The Intermittent Operation of Electronic Components. 2 Security Function Errors. 3 Check Engine Light (CEL) or Other Instrumentation Cluster Warning Lights. 4 Battery Drain (Parasitic drain). 5 No Start Condition.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

Is there a bad TCM, BCM, or ECM?

I have access to an ECM, PCM, BCM and TCM from a 2007 Sierra that I can try swapping over modules to help troubleshoot the problem if they are compatible. I have replaced the battery and cable ends and left the battery disconnected for 30 minutes hoping the ECM might reset itself, but that would just be too inexpensive and easy. FAIL!!!

How many miles does a 2004 Chevy Silverado get?

Mileage: 79,985 miles Body Type: Pickup Color: Silver Engine: 6 Cyl 4.3 L Description: Used 2004 Chevrolet Silverado 1500 Base with RWD, Chrome Wheels, 16 Inch Wheels, Front Bench Seat, Steel Wheels, Independent Suspension, and Vinyl Seats 2004 Chevrolet Silverado 1500 LS 18 Photos

Can a BCM be installed on a used car?

You canNOT just install any used BCM with compatible service number. It may not work correctly (or at all) because the program must match your exact vehicle configuration — engine, transmission, axle/tires, fuel system, security system, emissions, and various other options. A programmed replacement BCM needs to be relinked to the vehicle.

Can a BCM be flashed to a truck?

Something like a bcm (body control module) is one of the main computers on the truck. Others are correct it needs to be flashed aka learned to your truck. I advise against buying used electronics such as a bcm if that is what you were thinking. Also no one likes to dish out any more money than needed.

How do you troubleshoot a BCM?