BCM location and replacement?

Hello, it looks like pin #26 is the floor shifter going to the BCM, having to do with the shift lock controls. It looks like it's a green/white wire. You can verify by wiring color. I have also included how to replace the BCM. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

where is the body control module located?

under the dash just to the left of the steering column. Here is the BCM location in the images below.

Car has a electrical drain of seven volts. Did standard test. Pulled fuses out and three are connected. Display, interior, and BCM. Could the culprit be the BCM?

Electrical drains are not measured in volts. Voltage is pressure, not quantity.

Here is how you measure for a parasitic drain.

You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 10 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.

Yes I did that with my doom. With the bcm and the displace fuse removed I get 52 mill amps. But when I put the fuse back in I get 7.75

When you put it back in you are restarting all those timers again so you have to wait after plugging it in to see the real reading.

I just received the new bcm and the gm connector 25777448 today. Anyone familiar with installing the connector? The instructions don't mention what to do with the black wire.

there are a couple of specialtools to remove these but normally you can use a pic type tool to get in to release them. there are 7 different bcm's i coul d send a chart if yo uhave the oem part number

The connector I'm referring to is use to prevent electrical spikes from damaging the bcm

ok we have no info on that and i've never done one sorry

I took my car to shop to repair a oil pressure light, and he repalced the sensor, but as he unplugged the battery he said that the BCM blowed, and he had to replace that and have the car towed to reprogram the computer, and all is at my expense.
Is this to be expected each time you change the BCM?

If he admitted that he was the one that "blew" the BCM. Then why is it at your expense to pay for it? He should be paying for it if he was at fault. It does usually need programming by the dealer.

The mechanic is not taking the blame, he said that he had to disconnect the battery to do the job, and no matter who had disconnected the battery then the BCM would have blown out anyway.
Is this true?

That is in no way true. My guessing is that something else happened to cause the issue. In GM vehicles I have seen where doing such things can cause cluster issues, but thats mostly in the trucks.

my name is maria and i own a 2006 chevy impala and my bcm went bad and it wouldnt start so i took it to my mechanic and he installed the used bcm from another 2006 chevy impala with the same part # and it starts but the now the radio doesnt play and the service airbag and service engine light and im just wondering if the used bcm that i purchased can it be reprogrammed to my car without buying a new bcm.

the bcm has to be set up with a tech 2,you have to set the bpp sensor and restraint id.usually once the bcm is programmed it becomes locked and normally cannot be programed to the vin of your car,plus you have to get a bcm with the same options and engine size.I would have it scanned for the codes and see it it can even be set up.

Electrical problem 6 cyl Two Wheel Drive Automatic 120000 miles

My 2004 Impala will not start. I have replaced the starter and starter relay. I have found references to bad terminals on the body control module. I cannot find this part in my repair manual. Where is it located on the car? Also, is it something I should try to check myself, or should I take it to a mechanic? When I turn the key, there is no cranking, even with a brand new starter. I read that sometimes the terminals on the BCM corrode, and can cause this.

I don't need to check for fuel or spark until I can get it to crank right? Hopefully I will be able to fix it this weekend.

Your BCM is located on the left hand side of the steering column.

If you want to replace the BCM, you will have to have the new BCM programmed at a chevy dealer. You can't do it yourself. Once it is programmed though it's only a matter of swapping the BCM.
However, before you spend money on that, make sure your problem is not elsewhere.

Does your car crank or is it silent when you turn the key?
Is your security light on?
If your car cranks, have you checked for sparks and fuel?

Here is a guide that can help you

https://www.2carpros.com/articles/car-cranks-but-wont-start

Before you can check for a fuel or spark related issue you first need the car to crank.
I forgot to ask, but you checked your battery to make sure it was good and the cables were clean and tight right?

If you replace the starter and starter solenoid, but the car still doesn't crank at all, I'm thinking your problem is either a bad ignition switch, park safety switch, or brake pedal safety switch.

Check for voltage at the solenoid; if you get 0, suspect one of the problem mentioned above.

Please run some tests and get back to us so we can continue helping you.

Best, Ken

Electrical problem
2003 Chevy Impala 6 cyl Front Wheel Drive Automatic

where is the body control module located

If you want to know where it is located it is mounted on the drivers side kick panel. It is a box with three harnesses attached to it. If replaced, it must be done by a dealer since the module needs to be programmed for your vehicle. You cannot swap out a module for a used one since the VINs must match.

For some time my gas gauge has failed to operate, then I got a n error message saying "Highbeams Out"...but they are not out..but the front turn signals do not work but the back signals do work. Now the windshield washer does not work.
My mechanic said he checked it out and it is the Body Control Module that is bad. He said that he had everything working for a while then it broke again...so he recommended I go to the dealer to get the BCM replaced and reprogrammed. I then called another mechanic and he said I had three separate problems and he didn't think the BCM was the problem at all.
Can a faulty BCM cause all of the symptoms I described and how likely is it that replacing the BCM will fix everything?
Thanks..
Casey

In my opinion, I'd treat it like separate problems. I couldn't find any info, where the bcm had any control over the turn signals or fuel level gage.

Hello My name is kody,

I was wondering how much a body control module for a 2002 chevy impala LS would cost. we tool it to the dealer ship and they never told us how much it would cost for that individual part. I am also a mechanic and I never had to replace one.

It's in the $300.00 dollar range, and you need to download the info from it and flash the new module, or there will be MANY steps to program it, if possible.

Computer problem
2002 Chevy Impala

Went to Autozone, got a new BCM, programmed to my vin, installed it....the car stereo and security system still locked up. Other items controlled by BCM are working. What can I do myself? or do I have to go to dealership?

Who was supposed to have programmed this because I don't believe AutoZone has the capability to do that.

INTRODUCTION
During body control module (BCM) related service, the procedures below are designated to set-up the BCM correctly. Before you start, read these procedures carefully and completely.

SETUP NEW BODY CONTROL MODULE (BCM)

IMPORTANT:


The BCM will not function properly if the Setup New BCM procedure is not performed.
Make sure the battery is fully charged before performing the setup procedure.
Make sure all disconnected devices and connectors have been reconnected
Perform the Theft Deterrent Re-learn procedure after successfully finishing the Setup New BCM procedure. Refer to Programming Theft Deterrent System Components in Theft Deterrent. If the Theft Deterrent Re-learn procedure is not performed after a BCM replacement, the following conditions may occur:
The vehicle will not be protected against theft by the PASSLOCK system.
The engine will not crank nor start.
Connect a scan tool to the data link connector (DLC).
Turn the ignition switch ON.
Select Diagnostics and input all of the required data when prompted by the scan tool.
Select BODY CONTROL MODULE.
Select SPECIAL FUNCTIONS.
Select Setup New BCM.
Note, Input all of the required data when prompted by the scan tool.
Select Setup SDM Part Number in BCM, and follow the onscreen directions.
Select New VIN, and follow the onscreen directions.
Select Option Configuration, and follow the onscreen directions.
Select Point of Sale, and follow the onscreen directions.
Exit back to the SPECIAL FUNCTIONS menu.
When the BCM, VIN, Point of Sale and Option Configuration have been entered, proceed with Theft Deterrent Re-learn procedure.
If the scan tool displays UNABLE TO PROGRAM BCM, BCM IS SECURED, then the BCM must be replaced and this procedure must be repeated on a new BCM..
NOTE: After the above procedure has been completed, personalization of the BCM defaults to a default setting. Inform the customer that the personalization settings must be set again.

IMPORTANT: After programing, perform the following to avoid future misdiagnosis:



Turn the ignition OFF for 10 seconds .
Connect the scan tool to the data link connector.
Turn the ignition ON with the engine OFF.
Use the scan tool in order to retrieve History DTCs from all modules.
Clear all history DTCs

Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds .
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the PASSLOCK Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).
IMPORTANT: The vehicle learns the PASSLOCK Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.



Start the engine (the vehicle has now learned the PASSLOCK Sensor Data Code and/or password).
With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).

First of all thank you so much for your donation.I posted how to set up the new bcm and how to relearn the pass lock sensor after replacing the bcm.Give that a try.If the set up wasn't done with a tech2 with the correct software the new bcm won't work correctly.

Thanks for the detailed directions, will be working on it. On another site when I was researching this problem, someone mentioned they got the part at Autozone and it comes programmed for his specific VIN. I thought this was great, but in talking to the Autozone sales, it wasn't really programmed. Back to basics..... Thanks again for your help!

I didn't think it could be. You need the dealer for that.

what does the body control module control do? More specifically, does it control anything that I should be worried about if I am going on a long trip?

it controls the theft deterant,and all the interior and exterior lights.what are you worried about? are you having trouble with the vehicle?

i was worried about the power steering.

the BCM has nothing to do with the power steering,I thought you were having a problem with the BCM.post back if you need help.

My 2001 check impala will crank up in cut off, got a bcm will this work

Did you get a used bcm or a new one?You need to get a new one because the bcm stores the mileage in it and once the mileage is programed in it you cant change it to the mileage you had before you changed the bcm.Also the new bcm has to be programed with the correct calibration options mileage etc.Then the pass lock has to be learned so it will start.All the this is done by the dealer.

This car is in like new condition but the lights keep flickering. We have disconnected the battery and it will stop it for a little while but then it will repeat again. We took the car to a garage and they said it's the Body control module and the ignition switch? The garage has quoted us a price of nine hundred and eighty nine dollars to replace these two parts. we have not agreed to this yet as am not totally convinced this is the problem. Please advise as I am a college student and don't have a lot of money.

Well my first question is can you do this yourself? If you can then you can buy the switch new at a parts store and go to a salvage yard to buy the body control module. If you feel you can do this yourself then let me know and we can do some tests to check it yourself. Let me know what you would like to do. If you are not convinced that you can do it and don't trust the shop then go get a second opinion first. Get back to me.

Does a malfunctioning BCM also affect the traction control / ABS lights on the dash. My husband has cleaned the traction control sensors. He had replaced the hub assemblies on the front end about 2 years ago.

they have separate modules for the traction control and ABS. you should have the trouble code(s) pulled since the lights are on though, that will help pinpoint the culprit.