LQ4 6.0L engine 2002 HD

[thachevythang]

Sweet, thats what type of stuff I've been trying to find out. Could somebody elaborate a bit more on the frame mod? Besides the adapter, what all do I need to complete this swap? Any pointers and directions on where more info can be found is appreciated. I'm selling all my extras to get funds for this project. This is definitely the swap I'm going for but doing it solo, so I want the least amount of delay and all the parts to knock this thing out. I'll add on the performance after the 6 month warranty is up! Don't want to void that. Just want to get this thing running and I'll work out all the GET BAD parts later.

[motion427]

Can't get any better than this.

http://www.4wheeloffroad.com/brandpages/chevy/131_0406_6_0_liter_gm_engine_swap/index.html

http://www.4wheeloffroad.com/brandpages/chevy/131_0407_6_0_liter_gm_engine_swap_2/index.html

[Captkaos]

But to install a LS series engine in our 73-87 style truck,will need to modifie the frame and the crossmember a bit to clear the crank pulley and a small section of the block.

Not true for 2WD trucks, just get the transdapt or (insert name here) motor plates and drop it in.  The only issue is if you are running A/C and then you just need to clearance out part of the top of the rail.  There is another way but this is the simplest.

On 4x4 trucks if you use the adapter listed in their option 1 it should drop in also.

[thachevythang]

Well I talked to a buddy of mine that runs a shop in Dallas. He told me about the A/C issue, which is not much of a concern (might delete it anyway), but then he started getting into the wiring. He said I would have to purchase a harness other than the one that comes with it, to make it run correctly, and thats gonna cost me some major cashflow!!! He said it would be cheaper to get the GMPP carb intake manifold in the longrun of the build. That it would solve the harness and fuel pump issue, but as you said CAPT I would lose drivability and reliability. Can anybody help me sort out the wiring issue? I don't mind the carb idea at all but I stand by the saying "If it ain't broke don't fix it!"

Also a quick note from that 4x4 build. I purchased an aftermarket aluminum radiator thats an OE replacement. Electric fans, 2 row, trans cooler, mounts right up no problem. Should I have issue with this as well?

AND and big thanks guys!!! I'm gettin this thing rolling slowly, but surely its going to happen!!! Definately wouldn't be possible without help from 73-87chevytrucks


UPDATE: Will this harness be sufficient enough to rewire my truck and support the ECU harness? Or will it be easier to mod the harness as screamin86 mentioned below and connect to my current stock wiring? Knowing the ECU will have to be sent off to delete ALOT of things the second is what I'm leaning torwards.
http://www.speedscenewiring.com/ssw/product_info.php?products_id=283

[screamin86]

I've had a few friends that moddified the harness to work and I plan to mod my lq4 harness to work with my lm7(5.3) with ls1 intake and assesorys. Lol from what I've been told is you only need like 8 wires to make it run. A lot gets deleted out.

[motion427]

Sorry,I thought it was for a 4x4 setup.
One thing less to worry about then 

[Captkaos]

If you have a complete harness and are willing you can pull the unnecessary stuff out, or you can pick up one for around $500-600 with it already cleaned up.

Even with a Carb you still need something to control the spark...

The harness you linked isn't a engine harness, it is a complete 18 citcuit harness the will "support" and LS engine managment harness.  And they are expensive on their harness.

This is what I am using:
http://www.summitracing.com/parts/PRF-60217/

I know someone using this also:
http://www.currentperformance.com/eng_mgt.html

[thachevythang]

Well that harness was mainly because I was needing to rewire my truck but I'll still have to mod the harness regardless so thats a NO GO on that one. The second links services seems like what I may have to go with. Thanks everybody for helping me knock this thing out one thing at a time!!! So now I've got the adapters, harness, and reprogram covered!!! I've read that some people have used an 87 fuel tank w/ pump. Will this be easier and work well enough, or should I just go with an external fuel pump? I think thats the last thing to track down and figure in! Well besides the A/C issue but I can sort that out later. I've read (been doing ALOT of research!!!) that there may be a bracket to move that A/C up top and not have the issue with the frame.


UPDATE: Found that A/C bracket for 200 bucks at that second link!!! Now just the fuel pump issue.

[team39763]

If you can, stick with EFI.  The only advantages I think the carb has is the potential for you to tune it yourself and it can possibly be cheaper to get it running.  Like Capt said, if it was a race truck, carb would be a fine choice...but for a street driven truck efi wins.

[Captkaos]

I would never run an external pump, they are loud and they don't last.  There is nothing wrong with internal pumps and I would use a 87-91 sending unit with a pump applicable to the power level the F-body TPI pump will work for it stock.

[thachevythang]

Thanks for all the advice guys! Really appreciate it! Just arranged to pick it up in the next couple of days. 71,000 MILES for $900 w/ all accessories and harness! One last speed bump though. Guy said I would have to make or get a harness for the throttle control module! He didn't mention this before. He said it comes with the gas pedal but is missing the harness from it to the TAK module. I was under the impression that the harness was complete and covered all components. This isn't something extra is it?


UPDATE: will this help me wire the harness or is it only for LT1?
http://lt1swap.com/2000harness.htm

found some more good info here:
http://coloradok5.com/forums/showthread.php?t=241951

[thachevythang]

NEW UPDATE: Alright went to pick up the engine this weekend and ended up passing on it. Long story short, ended up being a LQ9 and the harness was hacked! Cut right into in one spot, didn't have the the gas pedal as he stated and was missing ac compressor and alternator. Really just flat out a bad deal. I asked what happened to the 02 LQ4 (nothing wrong with the LQ9 just false advertisement) and he said that was it. Let him know what he really had and it was a shame I couldn't do business with him. I'm pretty sure there were alot more miles on it and I've come across better quality deals online for the same price. I only dealt with him over the phone and that shop was going to be the shop to do some body work (by recommendation) I need but not anymore!!! I'm still set on this swap!!!! Just looking for a REAL DEAL not another DUD!!!

[team39763]

I bought mine from HiWay auto a few years ago and it's still going strong.  I think their prices have gone down a good bit since I bought mine.  I think they have several offices, so maybe you could see what they have in your area...and they deliver.