Official NBS 4.3v6 to GEN 3 V8 swap Guide

Quote:

---

Originally Posted by BIG BLOCK 555

i faced some problems during my swap any help will be good

1- the frame mount don't fit under oil pan but my stock one fit great . V8 frame mounts and V8 engine mounts- they will fit
2- there's some holes under water pump what are they for ?

---

do you mean open threads? any pics

i guess it's .. i will upload some for you

i install my engine without looking on this :l ,

also about my engine harness ( new one ) do you guys have detailed pic's installation ?

pics of a engine harness?

yup

Quote:

---

Originally Posted by BIG BLOCK 555

yup

---

now your playing too many games, find a 99-2001 engine harness. It will be red/blue on the ends that plug into the pcm. keep the pcm thats in your truck. (send it to nelsonperformance.com) no more silly questions! if thats too hard, pay someone to do the swap for you

easy blacstar it's my first swap ,

i got every thing but there is a problem ( i can't start the engine it's cranking but without really starting )

i tried reset the pcm so many times so any idea's ?

i changed spark plugs + new battery + cleaned up intake manifold & injectors ,

i have 2001 5.3 with harness + PCM i throw away my old engine with pcm in yard for now .. i know if send it to allen it will work like a charm but i live in saudi arabia that mean i have to send to him which will cost me a brand new one :/

Sounds like VATS isnt turned off.

^

can any tuner turn it off ? or can i turn it off ?

http://www.hptuners.com/products/vcmsuite.php

at least you didn't waste 2 weeks chasing wild geese to find out your Wait4Me tune wasn't telling your coils to fire :rolleyes: & have the tuner swearing up and down that you & 3 professional mechanics didn't hook something up right

^ yup it happen here a lot so tomorrow we will see what's up

thanks a lot guys

PCM programing failed .. < thats what i say in tuner's lap

do i change PCM & try again ?

try to get around VATS. nelsonperformance.com used to have an instruction page for it, but i can't find it now

i tryed everthing , after i run out of any ideas i take it to a workshop who have been known for tuning GM cars here ..

will probably need another pcm

they manage to start it but the engine sound poor i think main bearings are loose or something

where did u get the engine?

it's all good now i have another engine and it run great thank god ,

i have a small problem for now ( im planning on using the clutch fan for some time before i upgrade to E-Fan ) v8 fan shroud i can't install it at all

v8 radiator cost nearly 160$ used , what to do about it ? buy v8 radiator or modify the fan shroud ?

thanks a lot guys

spend the money on e-fans

or just don't stick your fingers down there. it ain't a question of V6 or V8 - it's the 28" vs 34" radiator. all 1/2 tons had the 28" for the first few years, but you need the 34" for e-fans... or if you have the bigger one, get the shroud from a 3/4 ton

will i will have to change the radiator after all today i take the for road testing ,

and when i stop at garage i fond that the stock gear cooler mix oil with water :/

here we know those cars by size like ( 1500 , 2500 HD ) 3\4 ton is 2500 ?

2007 classic 4.3 to a 2004 express lq4 with dbc
I know I have to convert to Dbw but will the harness still be plug and play?

No. Use a truck harness. *Wall, meet my forehead, again*

Very helpful thread to say the least..Is there any differences doing the same swap but using a 07 Escalade 6.2?

Thanks

Quote:

---

Originally Posted by Jeff Hefler

Very helpful thread to say the least..Is there any differences doing the same swap but using a 07 Escalade 6.2?

Thanks

---

what is it going in?

Oh yea i guess that would help..Its going in a 2000 GMC half ton truck...I have bought the 07 6.2 and a 05 6.0 both out of escalades.

Thanks

@ jeff hefler, convert to cable and grab a v8 harness(engine/trans) from a 99-02 truck, return style fuel injection, electric fans, program the red/blue computer and run it! the 6.2 will need this
http://www.lingenfelter.com/mm5/merc...3#.UgPyZfso6dI

Ok thanks man..How do i convert to return style fuel injection?

Quote:

---

Originally Posted by Jeff Hefler

Ok thanks man..How do i convert to return style fuel injection?

---

99-02 (some 03) any v8 fuel rail, then tell the person tuning your truck

guys how can i remove E85 Flexfuel sensor in this engine ?

the truck is 2001 engine is 2004 both have DBC but how this engine have flexfuel ?

http://i.minus.com/ibeFPeO6dtjdex.jpg

don't plug the sensor in. what is the picture for?

this one i think it connect to some hose from fuel tank ??!!

http://i.minus.com/jGf0Mw8DyUn75.jpg

it came with the engine when i bought it 4 months ago

from that time till now i have P0178 - Fuel Composition Sensor. Sensor Circuit Low Volts

sensor price is $647 i don't want to spend any money on this thing it's useless over here

Jesus Christ that's not a "Flex Fuel Sensor" it's the god damn EVAP solenoid. Instead of your gas tank venting to the atmosphere, it vents through that and the truck burns off the fumes. That's why it has a line to the tank.

i didn't know that frenchy , where is Flex Fuel Sensor ?

99-02 trucks don't know what Flex Fuel is

Hey guys. Just wondering, if I get a LY6 with the 4L80E, is it going to follow the same protocol as the Gen3 swap info here? Or are we digging up a whole new animal?

what is it going in?

2002 1500 4.3 60e sht bed std cab

same. 4l80 will mount about 7 inches further back than that 60e. but that swap has been done many times before. You would follow the sticky and use a v8 harness for a 2002 truck and then conversion box 24x-58x

I've read over this thread and didn't see my question addressed. My truck is a 2002 4.3 5 speed 4x4. I know I need a harness from a 99-02 v8 truck as well as a new fly wheel and clutch, but does the harness have to be from a manual trans truck to avoid other issues?