99s10sbc

iTrader: (2)

Got a 99 silverado z-71 5.3 have the chance to get a super low mileage 5.3 motor from an 06. By the way have 200000 on 99. I know the throttle bodies are different what else would it take for the swap. I should be able to swap between the two motors for what i need i would think. Would i have to do anything to my ecm or would it be like plug and play. Really nee a quick answer and some help for the GM LS experts please thanks in advance.

lownslo

iTrader: (3)

it should work going from a 5.3 to a 5.3 just know you got your stock motor to swap parts on! I would recommend a custom tune from justin at blackbear performance though!

00ChevyScott

iTrader: (10)

The only things you need to change are:

1. Throttle body
2. Fuel setup on manifold (or just swap your old manifold onto the new motor)
3. Your stock Oil pressure switch off of the 99 motor.

Also, your truck has EGR on it now, which the new motor will not have, so you will either need to swap your 99 passenger side manifold onto the new motor, or get a tune and take the EGR out and block off the hole in the side of your 99 manifold and run no EGR (will still pass emissions testing with the tune and EGR removed)

Any questions?

99s10sbc

iTrader: (2)

I will deff get a tune and a cam just want to make sure it will work before i do the deal. Probly a small cam zo6 or somewhere around those numbers dont have much experience with LS based motors yet but plan to change that. Thanks for the details 00chevy