bigbass1307

I have a chevy LS1 computer with a service number 12582605 YDNK
HDW# 12580786
and a serial number 86YD10K90317182N7

I am trying to find the pin out and harness wiring diagram. I know the pin connectors are Blue and Green, I belive from an 05 model but I'm not sure. Can any one help?

bczee

iTrader: (12)

I think the PCM is for a 03' 6.0L Truck with a LM7/LQ4/LQ9 and not a LS1 engine.

What did the Harness come out of ? the same ?.. A LS1 harness would have Blue and Red connectors (could wrong for some of the later application of the LS1 GTO or CTS-V's)

Verify what year, parts and if a Truck or Car you are trying to get information on, as a LS1 was never installed into any Trucks.

Many refer to any GenIII or IV engine as a LS1.. that is not correct and it is getting to the point where everyone just calling any Gen III or IV engine as a LS1.

LS1 is a GM Engine code for a 5.7L alum block/head engine. LS6, LS2, LQ4, LM7, L92, etc.. are also engine code and could be either a Gen III or Gen IV deoending which engine is being referred to. Many now also refer to the Gen III and IV as LSx, which is acceptable.

If you don't ask and give the correct information, you will get the wrong answer or be directed into never nerver land for what you are really trying to find out.

bigbass1307

I am not at home and cannot look at the information my self, I am three hrs away from home and my dad is working on the truck. As far as I know the harness came from the same truck, he told me it was from an 03chevy and it was the whole harness interior, exterior, etc. all I have is the numbers i mentioned before and I have posted pictures of the motor in the truck at another website but it really doesn't show anything. i was told it was an LS1 and I was told that by a shop that specializes in LS1 builds, tunes and performance upgrades. It was all working together a 78 truck before the previous owner totaled the truck and I bought the motor setup.

bigbass1307

It is for sure a 5.3L motor and the computer is for an 03 chevy does anyone have a wiring diagram and a pinout diagram. if so could you email it to me or post it here. My email address is bigbass1307@yahoo.com, thanks.

bczee

iTrader: (12)

Now that we are more certain of what engine/harness (o3' 5.3L truck stuff), I am sure that someone out there will be able to get you the pin out you need. I don't have it, but I am sure you will get the info now.

keep us posted.

eagleuh1

Bigbass, I e-mailed you some diagrams, let me know if you got them OK, and they work for you. Good luck

bigbass1307

I got the emails and the diagrams, is the wiring the same between the 03 trucka nd the 03 Suburban is the only question I have now, I plan to go home this weekend and hit it hard to see if maybe I can get it runnig this weekend (fingers crossed). thanks alot I appreciate the help.

eagleuh1

Don't know for certain. You might have a few things different. I think suburbans can come with duel fuel systems, senders and pumps. Stuff like that. Other than that, they should be about same pinouts. Check when you get home. If different, I highly recommend AlldataDIY.com. Helped me out a lot. Good luck.