Couple questions for the Ls guys......

[mikesfastss]

I have a 05 Denali 6.0, it seems the oil pump quit and it’s now locked up.

First question is can I swap a 5.3 in with out any hassle and if not what does it take to work?

Second question is what years are interchangeable and should I be looking for a certain year versus another due to better quality? And yes I realize it’s really 4 questions lol.

 

[RSpencer]

Everything will physically bolt up the same however without a cal for a 5.3 it’s not going to run correctly.

It should have an LQ9 (higher compression 6.0 found in Silverado ss, escalade, Denali). 03-06 would be the year range to look for. An LQ4 would work as well. Slightly lower compression but much more abundant as these came in HD pickups.

 

[Beigg]

Using the matched PCM taken from the same vehicle youd obtain the 5.3L from, it might be plug & play. Otherwise, the other option might be to flash it. I'm not sure if you'd require dealership support still...

 

[CruisnCobra]

I have a buddy who put a 5.3 in a 4.8 truck and it ran on the original PCM. It seemed to run fine but he got an aftermarket tune fairly quickly after the swap

 

[sofa king]

Swapping PCM's might be an option, but is the wiring the same pin for pin on each?
I have no experience with any LS engine, but that would be my question when trying to run A with B.

 

[RSpencer]

PCM swap would likely result in a no start due to conflict of VINs between pcm/bcm

 

[mikesfastss]

Yeah kinda what I figured just wasn’t sure about the reluctor wheel and that stuff, I’ll just spend a few extra dollars and get the 6.0 when I do it. Not gonna be anytime soon with this weather and my work schedule. Thanks for the help fellas.

 

[Beigg]

PCM swap would likely result in a no start due to conflict of VINs between pcm/bcm

that is what I was unsure of. The vin can be changed in the PCM tho.

 

[ultradriver10000]

Actually a 5.3L from 2001-2007 should work fine even with the stock computer and harness from your truck. The 02's will reset your long term and short term fuel trims and it should run a-ok.

The 5.3L and 6.0L use the same injectors, just slightly different amounts of fuel. If you want to sell the smoked 6.0 I might be interested.

 

[BrainFearGone]

Actually a 5.3L from 2001-2007 should work fine even with the stock computer and harness from your truck. The 02's will reset your long term and short term fuel trims and it should run a-ok.

The 5.3L and 6.0L use the same injectors, just slightly different amounts of fuel. If you want to sell the smoked 6.0 I might be interested.

as long as it’s 24x it should be fine right?

 

[1BADAIR]

Just have someone put a stock 5.3 flash in

 

[AutoRoc]

Cost of tuning could be the same as just doing a 6.0 vs 5.3. No?

 

[mikesfastss]

Cost of tuning could be the same as just doing a 6.0 vs 5.3. No?

pretty much what I was thinking, I have a 5.3 sitting but I’ll just get another 6.0

 

[ultradriver10000]

as long as it’s 24x it should be fine right?

Yeah exactly

Just have someone put a stock 5.3 flash in

It won't even matter

Cost of tuning could be the same as just doing a 6.0 vs 5.3. No?

compare a 6.0 tune and a 5.3 tune... the differences are negligible when you take into account that the stft/ltft can adjust ~10%

pretty much what I was thinking, I have a 5.3 sitting but I’ll just get another 6.0

up to you if you care.... the 5.3 would work fine, you'd be down a little torque, but if you don't tow a lot you'd be fine.