my first ls swap 1996 2 door Tahoe 4wd 385 Stroker to LQ4 cam headers **pics**

[silverado_lover]

What is that vacuum adapter fitting? I've never seen anyone mention that in their build thread

[PitchBlackC3]

Looks like the one for the intake manifold to the brake booster. His engine probably came from a truck with hydroboost which would have just had the plug version of that fitting.

[myzterray]

What is that vacuum adapter fitting? I've never seen anyone mention that in their build thread

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[myzterray]

so now i got the right motor mounts i was able to bolt up the drivetrain. ended up pulling the motor back out so i could modify the factor harness. also wired up the engine. my new harness doesnt have a plug for the knock sensor in the oil pan. is that bad? also i broke my timig cover when i trying to align the engine. and also a coil. if anyone has a coil and timing cover for sale please let me kno!

[PitchBlackC3]

That sensor in the oil pan isn't a knock sensor it is for oil level. You don't need it.

[myzterray]

That sensor in the oil pan isn't a knock sensor it is for oil level. You don't need it.

oh ok...question for ya...i was looking through http://lt1swap.com/1996_vortec_5.7/index.htm trying to figure out what wires i need to take from the old pcm and connect to the new one. so far this is what ive gathered.

blk connector
1 fuel pump.. connect this wire to the relay on the new harness

4 vss output splice green wire from harness onto this so i have the signal for the new pcm and still have functional speedometer gauge

5 connect to mil control on new harness for check engine light

10 connect to tcc wire on harness

blue connector

10 tcc connect to tcc on harness

then i believe all thats left would be the tach signal..not sure how to find that wire and im not sure which wore connects to the tcc.

just looking at the schematics this is what i think i will have to do. correct me if im wrong.

[RPM Graphics]

moving right along, looks good!!!! wish i could help you out on the wiring. i haven't got that far on mine yet & i'm running only the LS1 ECU. i still have to figure which wires to tie into for the speedo & tach.

[myzterray]

moving right along, looks good!!!! wish i could help you out on the wiring. i haven't got that far on mine yet & i'm running only the LS1 ECU. i still have to figure which wires to tie into for the speedo & tach.

thanks man! its a slow steady project. yea i dont think it will be that difficult. im just checking with pitch black because he is very knowledgeable and has helped me out so much during this build. once i get everything working ill will definitely pass the info along.