34coupe

will the 5.3 pcm run the 6.0 or will you have to get a custom tune?

99Silver6.0

iTrader: (1)

It will run on the 6.0 tune. But I cant say how well. It will run till you get a chance to get it tuned in.

rosscob

Mine ran OK with the 5.3 computer. It runs GREAT with a custom tune. I wouldn't recommend the swap without a tune.

slowprocess

iTrader: (9)

I had to drive mine home about 2 hrs with the stock 4.8L tune. With all the work I had done to the truck at one time, it ran like CRAP home. I was having to use the brake pedal like a clutch and steady get on the gas to keep it running at red lights. Out on the highway, it ran fine. Of course, this was with the cam, heads, and other goodies installed, not just a stock 6.0L.
You'll want a tune either way!!!

Carl Russell

was wanting to get everything needed from junkyard and rebuild myself
Has anybody done this and know what all has to be changed

RedXray

Done thousands of times. The 6.0 will drop right in and fit like a glove. The only issue is the 4.8 PCM will need a 6.0 tune.

B52Bombardier1

Possibly a wire harness / engine connectors due to differences. Definitely a tune to account for VATS (Vehicle Anti Theft System) and differences in cylinder volume. A 6.0 engine in good condition is tougher to find and more expensive than a 5.3 liter. Possibly a different flex plate.

Rick

Dannann

Just curious if you had done the swap and how it went.

1FastBrick

iTrader: (17)

No he posted 1 time and hasn't been back since.