Give Nelson Performance a call or look up Mellissa on the board and they can tell you what you need to make the swap as far as PCM's go. I agree go with a LS1 or a 6.0 you will be much happier. Nelson's website is Nelson Performance - Performance without Sacrificing Drivability
Chris S The GoFastPadre 00 Sierra ECSB Z71 Mods so far Headers Dual HFC's Flowmasters K&N CAI and much more to come. 06 Grand Prix no mods yet
Order a tune from NelsonPerformance. Let him know your stock VIN number and the size, year and model the donor vehicle was. I'd go for a 6.0L if I were pulling a trailer 30% of the time. Its a straight swap, just remember to swap intake manifolds assemblies, too.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
I got ahold of a local tuner and he said to go with the 5.3 because the ls1 isnt ment to pull, and the 5.3 has a much better torque curve. when i do pull a trailer its got my race car so with tires, fuel, and tools so im figuring roughly 6k lbs. what about a 5.3 and a cam? Im am now realizing after calling nelsons i do need a tune. Thanks again for all the help.
go 6.0 ive been in your shoes.i tow a trailer and ive had all 3 motors,6.0 is the strongest for towing ,o thats right i hve a few goodies on mine,lol.j/k i did it with a 6.0 and a small cam.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
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