I found a 1999 gmc sierra scsb with a 4.3 v6 and auto trans...just wonderin wuts needed 2do an lq4/4l80 swap into this? i already have a complete harness with this motor...ne advice will help on wether or not i should buy this truck or not...thx 4 reading...
Calculate all the $$$$ you're going to spend on doing the conversion and add that to your truck shopping budget. You'll save yourself a ton of headaches if you just buy a V8 truck to start with.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
oh ive already got a 2005 lq4/4l80 with complete harness and found a real clean new body style 1999 single cab gmc for 5000 and wuz wondering wut else is needed? can it just be thrown and get a tune or wut else is needed...
Biggest headache I see is that your engine is a 2005 and the truck is a 99. You can use a 2005 PCM, assuming you have all the DBW parts you need, but the BCM and the rest of the serial devices in the truck won't like it. AC request becomes a problem.
Motor mounts and stands for the frame, trans crossmember, driveshaft yoke and length. 2005 engine will also have a returnless fuel rail. You could use a vette filter/regulator to adapt your fuel system to the newer engine (tuner needs to know this (non-referenced regulator)).
Even though you have the engine and trans, don't expect it to be cheap.
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