Replacing bcm 2003 suburban - 2003 Chevrolet Suburban 1500

Some say yes, some say no, most say it has a GEM, not a BCM.

https://www.google.com/search?q=2003+Ford+Expedition+Eddie+Bauer%2C+does+new+BCM+need+programming

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BCM under console.
1999 OR 2000 Denali or Escalade BCM Body Control Module Tour...

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images for 2003 pontiac aztek wiring

Check ball in the fuel pump/sending unit is stuck. Letting gas drain out of the fuel lines. If it were mine II would live with it until the pump started going out. Instead of trying to start it, just turn the key on and off 3 or 4 times. This will save on the starter and pressure up the line. Sending units are $100 to $400, and about $300 to have put in.

New or used BCM. Used BCM you have maybe a one in a thousand chance that a used BCM will run your vehicle. I have done it 3 times in 10 years or so. New BCM, it has to be programmed to the vehicle. I can do it, some other people can do it also. We have thousands in equipment to do this. Dealers can do it also.

Check all the fuse labeled BCM. Everything you mentioned runs for the BCM, to include the security. Next I would check for power at the BCM plugs(you would need a pinout) There are 2 or 3 of them. If you have power, then your looking at replacing the BCM.

Rear door lock swith assembly needs to be replaced.

what is the problem? bcm is a onetime program cannot be reprogrammed. might try unhooking battery for a few minutes

Passlock system indicates an error. Your BCM doesn't see the correct password. This could be the passlock sensor (most common on these vehicles).

Im sorry but Emissionwiz is wrong i had the same problem and i just took out the BCM board completely and dismantled it. I'll i had to do was desoder the relay switch and sodered in a new one the relay switch cost me 2.50. so now you dont have to replace the BCM. and questions email me at [email protected]