5.3 Questions

[Kramlik]

Hi Guys,

First wanna Say thank you To Everyone ! So Much Learned And Everyone Is Very helpful

Now I Want To do the LS Swap In My 99 Tahoe
Are there Any Years I Should Steer Clear Of Or Between What Years Would Work best And Easiest ?

Thanks Again Guys This Site is Amazing !

---------- Post added at 09:47 PM ---------- Previous post was at 08:53 PM ----------

I Was Just Gonna Put A Remain 5.7 Back In it... I Have The Old Motor Out And Ready For That, But The 5.3 Seems Better Overall ( Power, Gas Mileage, More Dependable ) And For The Price As Well. But A Few Things Im Worried About... One Being The Computer For The 5.3 And For My OBS. Ive Seen It Done Two Ways 1st Being Re-pinning My Old Comp Or 2nd Using Both The New And Old Computer What Is Your Input Or Opinions On That ?

 

[SunlitComet]

To retain as much functionality of the entire vehicle it is best to use both pcm's.

 

[Kramlik]

To retain as much functionality of the entire vehicle it is best to use both pcm's.

Do You Know If There Is Any Info On How To Run Both Computers Like That ? Like A Write Up Maybe ?

 

[ezdaar]

Google search be your friend. I heard it has a vast wealth of knowledge!

 

[Kramlik]

http://www.hotrodlane.cc/PDFFILES/Lisa Tahoe.pdf

Found It

 

[mcm1209]

Use Lextechs PCM kit
Im running a 0411 PCM right now with my 5.7 vortec and will be swapping in a 4.8 out of an 06 truck. I will just have to add 10 wires and thats it. No need to add a whole new harness and PCM when one 0411 PCM can handle everything

 

[SunlitComet]

Assuming you have the right tune file and programming setup correctly.

 

[mcm1209]

Any tuner can load a 4.8l tune or what ever tune you want into the 0411 PCM.
Right now mine is running a 5.7 tune from a 2002 van.
The vans had the 5.7 non ls motor in them up until 2002.


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[SunlitComet]

I know. I already use that myself. I was referring to keeping the full functionality of the vehicle subsystems. To which 10 wires are you thinking are only required to add?

 

[dailydriverperf]

going in a 99 the 5.3 pcm will work just fine without the factory pcm

the computers all communicate through serial2 data wire

same system my 98 bravada uses and everything works just fine unless you happen to have digital climate control like I do then its rather tricky to control the a/c