I have a 07 silverado with a 5.3 that just recently started leaking oil everywhere. Appears to be a rear main seal. So I figure, great excuse to put a bigger motor in.
Donor motor is '04 LQ4 from a van. Motor is bone stock but I want to install a good torquey cam for pulling the race car trailer. Not worried about upper rpm horse, just low rpm highway cruising with trailer behind. The 5.3 has the DOD and if it's possible I would keep that. I plan on just pulling the intake from the flex fuel 5.3 and reinstall on the 6.0. The truck has the stock 4L60e and not planning on changing that out but recommendations to help it last longer would be appreciated.
So basically, I need the following-
-cam recommendations
-mail order tuner that can make all this work
-low cost headers that will fit
- would like to keep everything else stock.

 

If it has dod then its a gen 4 ls, nnbs correct? If so, you wont be able to use the lq4.

 

What's the reason?
If it comes down to keeping something little I really don't care about like DOD. I just want more power.

 

What is nnbs?

 

NNBS trucks are 2007.5-2013. They have GEN 4 motors which, depending on the motor, have DOD. If you have an nnbs you won't be able to use a gen 3 motor without a lot of work. The knock sensors and reluctor wheels are different.

You best bet is to sell that motor and find an LY6 that will drop right in.

 

Just checked and my motor has 243 heads on it, so it must be gen3. And it's the new body.

 

If it is the same body style as the truck in my sig then you have an nnbs with gen 4. You likely have an LY5 with 243 heads. Check in your glovebox and look for the rpo code LY5. Let us know what you find.

 

Yep found LY5

 

Damn. I was hoping the lq4 would work.
I guess I'll just fix the leak... And cam it, and headers/tune.