TBI to Vortec Swap question

[iluvmy72]

If you did or know anyone that has done this....please post a reply with some info....I'd like to know how he got the dash and stuff to hook up.

[tvblazer78]

I may have to move you to drive tran, but I will give it some time..

Can anyone help?

[clinebarger]

What year vortec engine are you going to use? What tranny? what truck do you have? you can use your factory sendors for oil& temp (genIII 4.8 5.3 6.0 require drilling & tapping) The speedo is more compilcated depending on what you have.I vote GENIII the 5.3 in my suburban made it feel like a new truck.

[hjedge]

What year vortec engine are you going to use? What tranny? what truck do you have? you can use your factory sendors for oil& temp (genIII 4.8 5.3 6.0 require drilling & tapping) The speedo is more compilcated depending on what you have.I vote GENIII the 5.3 in my suburban made it feel like a new truck.

did you use adapters and stock motor mounts? and transfer case mounts?

[clinebarger]

I did use adapters from street & performance and stock mounts. mines not
four wheel drive. what truck do you have? Advance Adapters has a kit to bolt a earlier tranny to a gen III.

[hjedge]

1990 with tbi 350/700r4 but want change motor and tranny

[iluvmy72]

yes I could use some help. I have a 1991 4wd Suburban I have installed in it a 1997 454 vortec. It has the harness and the ECM from the 197 as well. I will be putting in the 4L80e from a 1994 setup(TBI)...I'm told I'll need a custom Harness from a place like Howell to make it work. But my question is about the other stuff from the dash. Like the A/C, speedo, temp gage, oil lights.etc....how do they hook up? same thing with the tranny. What would I need to make that one from the 94 work? And what about the suspension....if you get the feeling that I'm lost...well....I am.

[clinebarger]

let me look up some stuff and i will get back to you. ill try to post some diagrams & pin outs.

[clinebarger]

heres some pinouts. hook pin 4 to an ignition hot.

[clinebarger]

dont have to mess with any of these.

[clinebarger]

make sure pins 17&18&19 are grounded (the black wires with eyelets on them need to be grounded to the block). pin 21 to fused battery hot(constant)
for pcm memory.