Swapping BCM TCM ignition and key from used car

BIGCHAPO40

MEMBER
2010 CHEVROLET IMPALA
3.5L
V6
2WD
AUTOMATIC
120,000 MILES

Can I use the BCM TCM key and ignition from an 2007 SS Impala on a 2010 3.5 impala? I mean all 4 components will recognize each other so should not be an issue am I right?

Friday, April 23rd, 2021 AT 8:13 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

I have to be honest. I don't think it will work. The TCM and the BCM are not designed for the new vehicle which will likely result (if it runs) in all kinds of issues.

To answer your question, the key will be recognized by the BCM. However, the computers are not designed for the 2010 which will likely lead to issues. The transmissions are different, and most of the other electrical components.

Let me know if you have other questions.

Take care,

Joe

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Saturday, April 24th, 2021 AT 9:45 PM

BIGCHAPO40

MEMBER
2 POSTS

I think I had a typo, or I don't know what the proper abbreviations are. So I had a 2007 SS that was wrecked from behind I removed the engine by the following procedure. I removed the 6 strut nuts up top the 4 undercarriage bolts below and dropped the motor complete with trans, rack and pinion suspension, both struts and wheel hubs while tires still on and I think I got most of the wiring. I also took the PCM, BCM, the fuse panel from hood compartment and from inside the passenger side by glove box and the radio ac switch information center 4 buttons, dash cluster, headlight switch panel, complete steering wheel column keys ignition and fob. Also the headlights. I think I previously typed TCM but I meant the PCM, which is the main computer in the hood compartment. Right? I think you were right tho for the fact that the 2 computers send different signal outputs to the motors because the SS is 5.3 and the 2010 is 3.5? It would send higher right?

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Sunday, April 25th, 2021 AT 11:19 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

Yes, the powertrain control module (PCM) would not work with the 3.5. When you mentioned TCM, that is the transmission control module and the BCM is the body control module.

I have to be honest. For this to work, you have to basically make the 2010 the same as the SS was. All computers, modules, vacuum hoses, wiring, and so on need transferred.

I'll try my best to help, but it is going to be difficult simply because of the variations between the two vehicles. I'm not trying to discourage you, but want you to be aware of what you are getting into. Anytime I have seen someone do this type of swap, there are always problems. Most commonly, a check engine light that will not go off which causes the vehicle to fail emission inspections.

Let me know what I can do to help. I'll give it my best shot. LOL

Take care of yourself,

Joe

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Sunday, April 25th, 2021 AT 6:21 PM