'06 4.2 swap into an '05

[Regulator]

I have a 2005 trailblazer ext 4.2 with a spun bearing. I have found a 2006 tb with a 4.2 that was front end totaled. I will be purchasing the entire truck. Will the 06 4.2 swap into the 05? What kind of extra work or concerns will I face?

This will not be my first motor swap on the platform, but my experience so far has all been with 02 and 03s.

Some quick advice would be great, hoping to pick up the parts truck tomorrow if it is a doable away.

Thanks

 

[Mooseman]

I do believe that crank sensor and PCM changed so it's gonna be an uphill battle with that swap. Internally, the reluctor changed too as well as the temp sensor location. Even if you swap the wiring to the 06, the communication with the BCM will likely be a problem. Swap BCM? I don't think so because of changes to ABS, traction control, Stabilitrak.

06 was a change year so it won't be an easy swap by any means.

 

[Regulator]

Damn, back to searching for a donor then. I was hoping for better news than that. Well if anyone needs an 06 parts truck I know where there is one in Indy for $500.

 

[limequat]

Actually 06 to 05 is pretty simple. The reluctor didn't change until 2008. Just swap it in using your existing electronics and good to go. The ECT did move. Just extend the harness.

 

[Mooseman]

That's it? I thought the reluctor had changed in '06? I knew about the ECT sensor relocation but I thought there were more changes that were more profound than that.

My bad. Jeremy @limequat is the authority on the electronics on these engines.

 

[limequat]

Nah, you're probably thinking of 2008 which is absolutely a debacle. Also a debacle, trying to use a 2006 PCM in a 2002-2005 truck.