VEHICLES, CAMPERS, and BOATS > Powerplant, Driveline, and Braking

2002 Suburban 2500 Duramax conversion discussion

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Flyin6:
So as not to detract too much from the standing build thread of my 2500 Suburban, let's discuss a duramax conversion here.

I will consider this a feasibility study into the possibility of installing a Duramax into the 2002 Suburban 2500

So baseline goal will be to install:

1. LBZ Duramax engine stock less than 80,000 miles or a rebuilt LBZ
    With: CP3 pump
             5 position EFI tuning
             Stock or close to stock turbo
             No EGR, no Catalytic in the exhaust
2. Allison 6-speed transmission
    Allison built sufficient to outlive the largest tune on the engine
3. Retain all factory features the truck was built with
4. Make it look close to stock
5. Have no unsolvable electronic quirks

To accomplish this transplant I will buy new:
Radiator
All hoses, belts, lines, fittings and so forth from GM
Intercooler
Use aftermarket I/C piping and couplers
Utilize aftermarket air filter
Utilize aftermarket exhaust manifolds and up pipes
Utilize aftermarket down pipe
Utilize a new 4" exhaust with a quiet muffler

Rebuild the engine
Build the transmission
Utilize a performance triple clutch converter
Utilize a fresh GM transfer case

So with all that being said, lets talk about how to do this, what it will take, and vendors

I will be performing all the labor myself and documenting here

Flyin6:
TexasRedNeck has already suggested I procure a same year 2500 as a donor

But

The same year utilizes a LB-7 engine which uses injectors inside the valve covers and has weaker connecting rods

and

It has a 5-speed Ally transmission

Bigdave_185:
Subbed lol to see how long it takes to adjust the title of other threads to “diesel conversion I should have started with”


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TexasRedNeck:
Don I believe I posted a link to duramax diesels website somewhere back where it detailed the issue you will confront with the can bus comm protocol.

Your best bet is to run LLY heads and injectors regardless of which bottom end you run. Unless you want to completely rewire the entire truck or deal with aftemarket ECU harnesses that won’t sync up with the rest of your modules you must run the LB7 FICM and ECM due to the differences in comm protocols in the 01-03 duramax platform.

This method is tried and true and to u don’t have to guess or try to solve a huge mess of issues.  I’ve researched it’s what I plan on doing with my LB7.  You can run LB7 rods or wagler street rods without breaking the bank.


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rpar86:
To fit the Allison I believe you need a body lift to fit it in the trans tunnel.


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