I'm about ready to do my 5.3 swap but have a few questions. Does anybody make a wiring harness to change your throttle body from DBW to DBC? Also can anybody tell me if I am missing anything, I have a complete 5.3 with all the accesories, the fuel line fittings in the swap post, and a tuned Pcm from Nelson. I am trying to change over to DBC so if anybody has any advice that would be great.
What are you putting the 5.3 into? A complete 2002 and earlier harness would be nice, along with intake and throttle body.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
It's going into a 2001 sierra with the v6 and 5 speed
I almost forgot, the engine is out of an 03 silverado
Why not keep the DBW? Any particular reason you want DBC?
I want to do dbc because i have the v6 which is already dbc. it just seems like it might be easier.
Originally Posted by Sgt Fig
You may run into some wiring problems( if your using the 03 harness and computer). I believe for a direct replacement, you will need a harness and computer from a 2001 V8. I know there are slight variations in the pin outs from year to year.
but if your good with schematics and wiring, all will be good.
I believe the computer will have to be re flashed if you already have a tuned pcm for a 03 but I could be wrong.
Last edited by jtaliaferro; 08-04-2008 at 08:41 AM.
2003 Silverado RCSB
LQ9 6.0l, PS longtube, CAI, E-Fans and a custom tune via hptuners
I'm sure Nelsons has some setup for you. I picked up my CPU from them.
Daily beater: 1997 Ford Escort
WIP: 96 S10 - 408 stroker: LQ9/T56 Swap, Callies Compstar Rods/Crank, JE LSx FSR Pistons, L92 heads w/.660 spring upgrade, Synergy custom Cam, 90mm Nick Williams TB, Yella Terra 1.7 rockers, Sanderson's LSx conversion headers, Compcams Magnum pushrods, Strange Prostreet 3.73 gears, Corvette C-5 brake conversion front, Firebird Trans-am conversion back, 03 Cobra injectors, Nelson tuned CPU/Wideband,
My biggest concern is changing over the wiring harness to work with the dbc
can someone tell me where i wire in the idle air control valve and throttle positioning sensor for the dbc throttle body? can i wire it to the harness or does it have to be wired to the pcm?
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