oange ss

iTrader: (50)

anyone done this yet ? other than having to swap a compleete wiring harness over, does the PCM control tranny functions in those year trucks

G-Body

iTrader: (4)

The PCM controls the trans, but it will plug right in to a 98+ F-body trans if you add a truck PRND switch. I don`t know if it will plug into a 97 or older trans though, and I think the torque convertor is different. If you want to put a truck engine in an f-body you will also have to swap to an f-body oil pan, pickup, windage tray, dipstick, intake manifold, and possibly exhaust manifolds. You will also have to rework the accy. drive a little bit to get the intake to fit.

oange ss

iTrader: (50)

I was asking about putting a new 6.0L in a 96-98 K1500 Silverado...sorry for the confusion

G-Body

iTrader: (4)

Oh guess I shouldn`t have assumed . Then you should have no problem with the intake, oil pan, or exhaust. I think the trans will even have the correct PRND switch. But I am pretty sure the spacing on the torque convertor to bellhousing flange is still different, but I think a custom torque convertor would solve that.

digitalsolo

iTrader: (24)

There is a spacer available from GM to allow the 6.0L to mate to the earlier trannies. They use it for the later 6.0L (short crank) to mate to the 4L80e. It's pretty cheap, something like 40 bucks with bolts.

oange ss

iTrader: (50)

but i would need the full wiring harness for the engine right ? what about the guage cluster ? speedo go thru the computer ? thanx for everyone's help by the way

G-Body

iTrader: (4)

Yeah, the wiring harness between a 96-98 vortec and the LSx based vortec is completely different. You should be able to make the stock gauges/speedo work.

oange ss

iTrader: (50)

i'm guessin Painless would/could have a harness to adapt, that would make it a little easier than having to remove/install/modify a new harness

G-Body

iTrader: (4)

Nope, at least not in my opinion, I have not seen a painless truck harness and I know that the injector connectors are different, there might be more. The factory harness really isn`t that bad. Even if you don`t want to do you own harness it would probably be cheaper to get a stock junkyard or ebay harness and send it to a sponsor than a painless harness, might even be able to get a direct plug in harness that way too .