Can the BCM be reprogrammed for added OEM options?

Sammytheorangutan · 07-02-2009, 11:41 PM

I've done a search and come up with different answers. I want to add a few OEM options to my '04 Blazer (power seats with memory, steering wheel radio controls, factory fog lights, trip computer, RKE). My local dealer says I need a new BCM that would then have to be programmed with all of these RPOs. I keep hearing from others here that a BCM can simply be reprogrammed with the correct RPOs.

Which is it?

Mr.woodscrewsNbondo · 07-02-2009, 11:48 PM

most the power seats Ive seen have the module built in.

***orangesonoma*** · 07-03-2009, 12:46 AM

only thing i think that goes into the bcm is keyless and fog lights..and the keyless has a seperate mod that you need..

all the others are stand alone as far as i know...

Sammytheorangutan · 07-03-2009, 08:34 AM

Quote: Originally Posted by orangesonoma

only thing i think that goes into the bcm is keyless and fog lights..and the keyless has a seperate mod that you need..

all the others are stand alone as far as i know...

From the BRAVA-DIME thread:

Quote: Originally Posted by orangesonoma

...you have to match the bcm to the column...

I'd have to swap out columns in order to get the steering wheel radio controls (afaik). I would use my current ignition switch. Would that work or not?

What's the separate mod for the RKE? Are you referring to the transmitter box under the dash? Or is there something else involved? I'm hesitant to go aftermarket with most things electronic as it seems that just about everything in the truck runs through the ECM/BCM/PCM and I don't want to mess up anything.

Fog lights could be done aftermarket and I'm not so hesitant to do that since it's mostly wiring (separate from any control modules) and relays, but it would be nice to use the OEM switch under the headlight switch for a cleaner look.

Sammytheorangutan · 07-03-2009, 08:41 AM

Quote: Originally Posted by dustin42069

most the power seats Ive seen have the module built in.

I'm not sure about that. In another thread here (can't remember which one) someone stated that the memory for the seats went through the BCM. It sort of makes sense as I swapped in some power/memory seats from an '01 Jimmy into my '96 Jimmy a few years ago. Got the power to work but not the memory. Maybe it depends on the year of the power seats? Memory isn't a huge concern but if I'm going to swap in power/memory seats anyway, it would be nice to have all of the features work.

***orangesonoma*** · 07-03-2009, 11:49 AM

yeah if you change over all the components from the switch you should be fine since it will still match your bcm

Sammytheorangutan · 07-03-2009, 04:59 PM

What needs to be done (somewhere down the road) when I actually need a new ignition switch? Would I have to take it to a dealership? Would they need to either reprogram my BCM or would I even need a brand new one (at around $400) just for an ignition switch swap? Or would I need to do that passkey relearn thing? (key in run position for 30 min, etc, etc)

Just trying to plan ahead.

~~4x4zr2GA~~ · 07-03-2009, 06:43 PM

i just bought some power seats for my truck from a member on zr2usa, he already has power leather seats with memory in his zr2. i asked him if it all worked and he told me the memory doesnt becuase he would have to get a new BCM with the memory stuff programmed in it.

Sammytheorangutan · 07-03-2009, 08:26 PM

OK, thanks. Back to my original question then. Can a dealer (or anyone with the proper equipment) reprogram my BCM or will I have to buy a new BCM and have it programmed with all of the options I want to use?

07-02-2009, 11:41 PM	#1
Sammytheorangutan Registered User Age: 42 Join Date: Jun 2009 Posts: 556 Location: User is: OffLine	Can the BCM be reprogrammed for added OEM options? I've done a search and come up with different answers. I want to add a few OEM options to my '04 Blazer (power seats with memory, steering wheel radio controls, factory fog lights, trip computer, RKE). My local dealer says I need a new BCM that would then have to be programmed with all of these RPOs. I keep hearing from others here that a BCM can simply be reprogrammed with the correct RPOs. Which is it?
	[Reply w/Quote]

07-02-2009, 11:48 PM	#2
Mr.woodscrewsNbondo rolling work in progress Age: 19 Join Date: Feb 2009 Posts: 1,288 Location: nlr ar User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? most the power seats Ive seen have the module built in.
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07-03-2009, 12:46 AM	#3
*orangesonoma* forum idiot Age: 31 Join Date: Oct 2002 Posts: 46,859 Location: Indian Trail, NC User is: Online	Re: Can the BCM be reprogrammed for added OEM options? only thing i think that goes into the bcm is keyless and fog lights..and the keyless has a seperate mod that you need.. all the others are stand alone as far as i know...
	[Reply w/Quote]

07-03-2009, 08:34 AM	#4
Sammytheorangutan Registered User Age: 42 Join Date: Jun 2009 Posts: 556 Location: User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? Quote: Originally Posted by orangesonoma only thing i think that goes into the bcm is keyless and fog lights..and the keyless has a seperate mod that you need.. all the others are stand alone as far as i know... From the BRAVA-DIME thread: Quote: Originally Posted by orangesonoma ...you have to match the bcm to the column... I'd have to swap out columns in order to get the steering wheel radio controls (afaik). I would use my current ignition switch. Would that work or not? What's the separate mod for the RKE? Are you referring to the transmitter box under the dash? Or is there something else involved? I'm hesitant to go aftermarket with most things electronic as it seems that just about everything in the truck runs through the ECM/BCM/PCM and I don't want to mess up anything. Fog lights could be done aftermarket and I'm not so hesitant to do that since it's mostly wiring (separate from any control modules) and relays, but it would be nice to use the OEM switch under the headlight switch for a cleaner look.
	[Reply w/Quote]

07-03-2009, 08:41 AM	#5
Sammytheorangutan Registered User Age: 42 Join Date: Jun 2009 Posts: 556 Location: User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? Quote: Originally Posted by dustin42069 most the power seats Ive seen have the module built in. I'm not sure about that. In another thread here (can't remember which one) someone stated that the memory for the seats went through the BCM. It sort of makes sense as I swapped in some power/memory seats from an '01 Jimmy into my '96 Jimmy a few years ago. Got the power to work but not the memory. Maybe it depends on the year of the power seats? Memory isn't a huge concern but if I'm going to swap in power/memory seats anyway, it would be nice to have all of the features work.
	[Reply w/Quote]

07-03-2009, 11:49 AM	#6
*orangesonoma* forum idiot Age: 31 Join Date: Oct 2002 Posts: 46,859 Location: Indian Trail, NC User is: Online	Re: Can the BCM be reprogrammed for added OEM options? yeah if you change over all the components from the switch you should be fine since it will still match your bcm
	[Reply w/Quote]

07-03-2009, 04:59 PM	#7
Sammytheorangutan Registered User Age: 42 Join Date: Jun 2009 Posts: 556 Location: User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? What needs to be done (somewhere down the road) when I actually need a new ignition switch? Would I have to take it to a dealership? Would they need to either reprogram my BCM or would I even need a brand new one (at around $400) just for an ignition switch swap? Or would I need to do that passkey relearn thing? (key in run position for 30 min, etc, etc) Just trying to plan ahead.
	[Reply w/Quote]

07-03-2009, 06:43 PM	#8
~~4x4zr2GA~~ Banned Age: 22 Join Date: Feb 2006 Posts: 2,361 Location: warner robins, GA User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? i just bought some power seats for my truck from a member on zr2usa, he already has power leather seats with memory in his zr2. i asked him if it all worked and he told me the memory doesnt becuase he would have to get a new BCM with the memory stuff programmed in it.
	[Reply w/Quote]

07-03-2009, 08:26 PM	#9
Sammytheorangutan Registered User Age: 42 Join Date: Jun 2009 Posts: 556 Location: User is: OffLine	Re: Can the BCM be reprogrammed for added OEM options? OK, thanks. Back to my original question then. Can a dealer (or anyone with the proper equipment) reprogram my BCM or will I have to buy a new BCM and have it programmed with all of the options I want to use?
	[Reply w/Quote]