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Old July 19th, 2011, 11:14 PM   #1
carlsonjames2009
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6.0 swap in 97 sierra

i have a 97 sierra. wanting to swap in a 6.0 and 4l80. this a pretty easy swap? can i run my transfercase? any words of wisdom? would kinda like to do a mild build to it before the transplant.. nice cam.. not sure what else i can really do...
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Old July 19th, 2011, 11:42 PM   #2
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Word of wisdom. Why?
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Old July 20th, 2011, 12:02 AM   #3
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has a 5.7 with 250000 miles running 35s. need more power.. 4th 4l60 is on its way out. so?? why not?
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Old July 20th, 2011, 06:22 AM   #4
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Piece of cake. Bolt it in, plug it in, and drive.
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Old July 20th, 2011, 08:04 AM   #5
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Originally Posted by carlsonjames2009 View Post
why not?
You start out with a worn out old truck and end up with a worn out old truck with slightly more power. IMO, i would upgrade my whole vehicle.
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Old July 20th, 2011, 08:25 AM   #6
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Not too difficult. Just look through any of the swaps putting these into Jeeps, to get some ideas.

The 6.0 is a nice motor as a starting point. They take well to upgrades. 243 heads will bump the compression nicely, those with a good cam will net you 425-450hp or so. Switching to rectangle port heads or aftermarket cathedral ports even more.

IIRC, the 4L60 you have is a 27 spline output and the 4L80 is a 32 spline. I'd just grab the t-case also while you are getting the engine and trans.

Its your truck, you know best if its worth the upgrade.

Any motor swap, you neeed to just go down the list and look at the things you need to do to make the swap:

Engine & transmission mounts (you can get plates to adapt your existing frame mounts to the 6.0, but likely need a new/reclocated trans mount crossmember)

Driveline adapters (shouldn't need any, but likely need driveshaft modifications)

Fuel system: Probably OK with the existing in tank pump, you'll need to make 56-58psi at the rail.

Cooling system: You can get hoses/adapters to use your existing radiator if its in OK shape.

Exhaust: You'll need to have it modifed to meet up with the new headers/manifolds

Wiring: Probably the biggest thing, you need to have the harness modified to your needs, and the computer setup correctly.

Gauges: NO idea how the stock chevy gauges/cluster are, the 6.0 is all metric senders, you might be able to adapter the old gauges, probably best to make a custom clusters with aftermarket gauges. The tach signal is funny (need an external pull up resistor and gives a 4 cyl output).
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Old July 20th, 2011, 08:38 AM   #7
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Quote:
Originally Posted by steveo View Post
You start out with a worn out old truck and end up with a worn out old truck with slightly more power. IMO, i would upgrade my whole vehicle.


not that it matters but this truck is probably in better condition than most people new vehicles.. im ocd when it comes to the truck. would be like telling someone not to bother putting a motor in their muscle car.. its old and tired too.. right?
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Old July 20th, 2011, 08:38 AM   #8
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I'm in the process of a similar swap with my 2000 k3500, except going 8.1.

My thought process was tackle the computer side first by swapping in the gen 3 ECU that ran 99+ LS1s, gen 3 v8's, and the 01/02 full size vans that ran the same l31 your truck has, commonly referred to as the 411 swap. I swapped one in my truck and just need one more step - getting the gas gauge working which requires a ground reference line to the sending unit, as our trucks have the reference grounded to the frame.

No need to go aftermarket for gauges, except i'm adding fuel pressure and wide band(s) at some point.

GMT400 has a number of guys that have performed this computer swap, and one member (lextech if I remember correctly) has a spreadsheet of how your wiring needs to be swapped from A to B.

My truck woke up a bit since the computer swap, but it's still not up to the duty it gets put through.

Make life easier, look for a 99-02 6.0 - it's drive by cable vs drive by wire. Otherwise you need to install the DBW pedal and associated harness and brain box.

What are you doing with the 350 once it's out?
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Old July 20th, 2011, 08:48 AM   #9
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ls1truck.com has a lot on this. it has been done many times over there.
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Old July 20th, 2011, 08:49 AM   #10
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thanks for the advice guys... i really dont have a plan for the old motor yet.. it runs good, just want more power. i have 4.56 gears and a 3000 stahl, power programer, cold air intake andthrottle body spacer makes decent power, but i know a 6.0 would make a lot more, pull heavy loads a lot better. i could run it for years to come, but just want more.
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Old July 20th, 2011, 08:53 AM   #11
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This swap sounda like a serious pain in the ass. Think about what your time is worth, because its gonna be a major investment in that and money. Lemme ask u this..is your 401k properly funded? That's agood use of time if u ask me.
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Old July 20th, 2011, 12:37 PM   #12
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Quote:
Originally Posted by carlsonjames2009 View Post
not that it matters but this truck is probably in better condition than most people new vehicles.. im ocd when it comes to the truck. would be like telling someone not to bother putting a motor in their muscle car.. its old and tired too.. right?
whatever. I have been down this road, older vehicles develop problems. its a fact of life. the difference between your old truck and a muscle car is that even a muscle car in poor shape is worth something.
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Old July 20th, 2011, 12:45 PM   #13
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Quote:
Originally Posted by steveo View Post
whatever. I have been down this road, older vehicles develop problems. its a fact of life. the difference between your old truck and a muscle car is that even a muscle car in poor shape is worth something.
i realize this. however, if i wanted to upgrade trucks, i coulda went and bought one just like every tom dick and harry. and i wouldnt of posted the question.
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Old July 20th, 2011, 12:46 PM   #14
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The 3000 stall is huge part of your lack of power problem. i doubt our running a cam in the .500 lift area are you? Unless you have a huge cam a stall that big is worthless as shit in a street driven rig. Probably the reason your dropping trannys like you are. With the proper TQ in there and a good cooler you should get many miles from a 4l60e in your truck.
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Old July 20th, 2011, 12:47 PM   #15
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Quote:
Originally Posted by carlsonjames2009 View Post
i realize this. however, if i wanted to upgrade trucks, i coulda went and bought one just like every tom dick and harry. and i wouldnt of posted the question.
Just trying to give you some sound advise. waste your money however you like. if you want some real power do this to your POS.

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Old July 20th, 2011, 01:09 PM   #16
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what motor ya got in there? not tryin to be an ass! just dont comment on a thread if your not gonna be of any assistance. didnt post it to figure out who was the biggest dick head on great lakes.. was asking for help.. see if anyone has done a swap or is anyone knew how hard it was.

my motor is stock. the guy who built the trans said it would help for pulling. it does help keep it in its power band. it was only in this trans. it dont seem to get hot. however, you may be on to something. thanks
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Old July 26th, 2011, 04:38 PM   #17
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That is a cummins. the 3000 stall is way to much for a stock motor. that thing is slipping like crazy during normal driving? you cant be running much more than 2300 rpm down the highway? for a lot of towing you would want a tighter converter than stock. like 1400-1600 stall a heavy RV/towing converter. that's what i put in my truck when i rebuilt the trans. i get 1.5-2 mpg better fuel economy because its more efficient than a high stall. also the 6.0 swap is a great idea. not super complicated. lots of the swaps are posted online. plus lots of easy power potential in the ls engines.
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Old July 26th, 2011, 09:34 PM   #18
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awesome. thanks. my 350 runs great.. for a 350. i just know a 6.0 is a way stronger engine
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Old July 26th, 2011, 09:55 PM   #19
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CUMMINS.

/thread
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Old July 26th, 2011, 10:06 PM   #20
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i know the smokers are making crazy power. just wanna stick to a gaser
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