I just installed a 2.2 out of a 2010 Lt along with the ECM and the TCU and I am still getting the passlock to activate even after retraining does anybody have any ideas on how to get past this or I am missing something by the way I put this in my 2007 Lt

 

I moved the post to a new thread.

It is not recommended to use a 2.2 VVT engine in a car that is programmed for non VVT.

The problem you may run into switching BCMs is the rest of the options on the car will need to be "registered" like the seat belts/airbags, radio, windows etc.

Also you may have problems with the DMV since the odometer is stored in the BCM, do you have a Tech2 or equivalent?

If either or both had OnStar you have another can of beans.

Now stop posting all over the place, I have been trying to consolidate this for you.

 

The only connection between the PK3 and the ECM is via the GM lan, so I'm guessing you will need to register the ECM with the BCM.

The thing is all of the computer modules are on the CAN bus, so they need to know what they are talking to.

BTW; the 2007 is a L61 engine and the 2010 is a LE8.

And now I'm moving this thread.

 

I have the ECM from 2010 in it but not the BCM but if I put the BCM do I need to do anything with the GM LAN. And apologies for all the postings I was lost

 

Also note I have the engine wiring harness from new car in it along with new relay box. Only found one connection that I changed it was one for abs which the 07 did not have

 

I really not sure what or if it can be done. The 2 engines are completely different.

You should not have needed to relearn the key. The PK3 module is in the steering column. Therefore, I am guessing about the security problem being the new modules on the CAN bus. I don't know that the modules are compatible with each other.

Typically any replacement module needs to be integrated into the CAN bus. There are more modules than meet the eye. The CAN bus/GM lan is basically like the very old fashioned daisey chain one wire computer network, except that it doesn't work if you change or remove any one module.

 

so I either need to replace every wire and module with the parts from the donar car or there has to be a way to reprogram the old modules. As long as all the wires land in the proper spots. Has anyone heard of New Rockies they make a component to fool the security

 

You might check fuses #8 and #10 on the BCM.

The ABS module is on the CAN bus, so maybe the bus is looking for it.

I know the programming of the ECM is different between the years, I don't know if they are the same part numbers.

 

I believe there are 9 modules on the CAN bus I am thinking if I am very lucky I can swap out all nine and cross my fingers that the wiring points are the same and it will work if not I guess it's a trip to GM for reprogramming

 

I was just looking at the "book". There are 2 different key relearn procedures; 10 minute and 30 minute. If you replace the ECM you MUST use the 10 minute method. That is the one that requires a Tech2 or equivalent.

I did put a new, programed to my car, ECM in my 2011 without having to do any security fiddling. It was just plug and play, aside from having to re learn the crankshaft sensor. But, that was for the correct engine, year and BCM.