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LC9 Engine Swap VIN 3 to VIN 7

2.6K views 6 replies 5 participants last post by  RDF1  
#1 ·
New to the forum and did some looking around can’t seem to find the exact answer or similar situation. I’d like to know if it’s plug and play. I’ve got a 2009 Silverado 1500 4x4 with the 6 speed trans. And 5.3L LC9 vin 3. Looking to swap in a 2013 5.3L LC9 Vin 7. I’m wondering if anyone has done this and any problems they may have run into? Was it plug and play?

Now for those wondering why I’m swapping engines. The truck is my shop truck and does a lot of driving. Currently sitting at 410,000kms. Overall the truck is in great shape and transmission has been changed/rebuilt. Just last week I had a lifter collapse on me. I’m guessing because the rear main seal started leaking about a month ago and between working and checking the oil more frequently I must’ve forgot about the oil for just long enough. I had planned to do the seal but just didn’t have time. So I’m hoping to just throw an engine in it for now and keep on trucking so I can have a look at mine and possibly go over the whole engine in the evenings and weekends while still having the truck on the road. Such as the AFM delete. New seals, Gaskets, water pump, etc.

The 2013 LC9 VIN 7 I’d like to swap in has AFM which doesn’t bother me. It also only has 200,000kms. And no known issues. Frame is no good in truck that’s why it’s pulled. I heard it running and it sounds and looks good. I just wanna be sure I’m not wasting my time swapping it out.
 
#3 ·
Not quite plug and play. The injectors on the newer engine are larger and that engine has VVT. This means it also has different pistons with a slightly lower compression ratio and a different camshaft profile.

Use your fuel rail and injectors and leave the VVT unplugged if you don't want to go through the work to make it work in your truck. The ECM would have to be pinned for it and the software updated.

Unplugged, the camshaft is "parked" and works just like your old one, no issues at all leaving it this way. VVT engines however are more sensitive to oil, make sure it is Dexos approved, don't leave it in for 8K miles and you'll be good.

The change in VIN numbers had to do with other engine availability and not anything to do with the LC9. The 2007-2009 LC9 did not have VVT and the 2010-2014 LC9s have it regardless of VIN.
 
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#4 ·
Would the harness just swap right in tho since one has VVT and the other doesn't as I would think it would be a different harness cause of the VVT?
Or the years are close enuf that the harness are the same thru-out?
 
#7 ·
Dammit I was halfway on track,lol.
Gotcha bud. And well harness can be made to swap and fit. But ya just get rid if the vvt.
Why I'm glad my 6.0 didn't come with none of that stuff.
IF yours is the L92 it has the VVT.