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BCM Issues

Dogluvr

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Dogluvr Enthusiast

Dogluvr

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I have been having various issues on my 99 Sierra 1500. After a lot of research I've narrowed it down to the BCM. My question is has anyone reprogrammed a used BCM to the options they had on their truck? I bought a used one from ebay..same part number, identical in every way. I called the dealer and explained what I had and they said they could REPROGRAM it for $100. So I went in only to have them tell me after about two hours that they could not enter any RPO codes. I went back and talked with the technician and he said it's probably their software that is not allowing them to do it and not a problem with my used BCM. All they ended up doing was the security relearn which I just found out I could have done myself.

Is there something they are not doing right? Or is it not possible to completely reflash this used BCM? The seller on eBay said it could be done.

silveradosid Senior Enthusiast

silveradosid

Posted
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had the same problem with gm on programming an air bag module. same thing bought off ebay it was from a yukon and i have a silverado. it had the same part number and gm could not program it. i found a guy who does aftermarket stuff and he was able to program it for me.

Dogluvr Enthusiast

Dogluvr

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Yeah I got tired of going back and forth so I just bought a new one. It arrived today so I go to get it installed (at no charge because they told me they could do the other one and took my money when they knew they couldn't) I hate going to stealerships! I'll post the results tomorrow. Thanks for the reply

Dogluvr Enthusiast

Dogluvr

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The new BCM is installed and everything works perfectly again. My new remote fob is in the mail so I'll know in a few days if that was in fact the problem with my keyless. The dealer showed me on the tester how the remote was not working. We'll see. Lesson learned: don't buy a used BCM. I still have no idea if it's even possible to reprogram a used one but I know the dealer cannot!

Dogluvr Enthusiast

Dogluvr

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Update: the new key fob did not work. Dang! It must be an issue with my RCDLR. I'm not even gonna mess with it anymore. I'll just buy an aftermarket remote start/keyless entry and call it a day.

Daryl LBZ Senior Enthusiast

Daryl LBZ

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Update: the new key fob did not work. Dang! It must be an issue with my RCDLR. I'm not even gonna mess with it anymore. I'll just buy an aftermarket remote start/keyless entry and call it a day.

What is the RCDLR?
Dogluvr Enthusiast

Dogluvr

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Remote control door lock receiver. Why you have any other ideas? I tried disconnecting the battery for about 15 minutes and it still would not pick up the signal.

Daryl LBZ Senior Enthusiast

Daryl LBZ

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Remote control door lock receiver. Why you have any other ideas? I tried disconnecting the battery for about 15 minutes and it still would not pick up the signal.

No ideas, I was just curious because my keyless entry works randomly. Any idea where this RCDLR is located?

Dogluvr Enthusiast

Dogluvr

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No clue. I've researched some but got no definite answer

If you do end up finding it be sure and post your results!

Daryl LBZ Senior Enthusiast

Daryl LBZ

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No clue. I've researched some but got no definite answer

If you do end up finding it be sure and post your results!

Okay, will do. I'll see what I can find out later today.

Dogluvr Enthusiast

Dogluvr

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Looked through it. Looks like the RCDLR may be in the passenger door...I'll know for sure in a few days as I just ordered a set of factory manuals for my truck.

Dogluvr Enthusiast

Dogluvr

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By the way, you said yours worked randomly. Have you tried cleaning off the contacts in the remote?

Daryl LBZ Senior Enthusiast

Daryl LBZ

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By the way, you said yours worked randomly. Have you tried cleaning off the contacts in the remote?

Not yet, but that was one thing I planned on doing just haven't got around to it yet.

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