What year motor?

[Painter D]

Is there any way to tell what year motor I have? All I know is tht it came out of an Escalade.

[Wasted Income]

If it came with the ECM, you can scan the VIN out of it and will be able to tell. Other than that, can you post a pic? There are a few external cues that can help narrow it down.

[Painter D]

Thanks ill try to post some pics later this evening.
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[Painter D]

Here's a few

[65Gregg]

On the rear passenger side of the block is a number cast in the block, the second digit is supposed to be the year.
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[ls1nova71]

It's definitley a 2003 -up. Judging by the return style fuel rail, I'd say it's a 2003, most '04 and up were returnless unless they were flex fuel. That said, most parts have casting years on them, look closely and you'll see a little round symbol with a number in it, that's the year the part was cast. Underside of the valve covers, aluminum part of throttle body, inside the oil pan, on the back side of the A/C mount bracket are just a few places to look.

[clinebarger]

Originally Posted by ls1nova71

It's definitley a 2003 -up. Judging by the return style fuel rail, I'd say it's a 2003, most '04 and up were returnless unless they were flex fuel. That said, most parts have casting years on them, look closely and you'll see a little round symbol with a number in it, that's the year the part was cast. Underside of the valve covers, aluminum part of throttle body, inside the oil pan, on the back side of the A/C mount bracket are just a few places to look.

Beat me to it

[clinebarger]

'03

[Wasted Income]

Now that we've narrowed it down to 02/03 you should be good to go. There are no differences between those two years. Any parts you order for one, will fit the other.

What are your plans for this engine?

[ls1nova71]

Originally Posted by Wasted Income

Now that we've narrowed it down to 02/03 you should be good to go. There are no differences between those two years. Any parts you order for one, will fit the other.

What are your plans for this engine?

Actually there are quite a few differences between '02 and '03. 2000-2002 throttle bodies are the same, and 2003 to 2007 are the same. They each use a different TAC module and the harnesses are different due to the different throttle body. Pre 2003 PCM wil bhave blue and red connectors and 2003 to 2007 are blue and green.
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[Wasted Income]

Originally Posted by ls1nova71

Actually there are quite a few differences between '02 and '03. 2000-2002 throttle bodies are the same, and 2003 to 2007 are the same. They each use a different TAC module and the harnesses are different due to the different throttle body. Pre 2003 PCM wil bhave blue and red connectors and 2003 to 2007 are blue and green.
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Ah dammit....I don't mess around with any of that DBW nonsense With all my builds, the DBW TB goes in the dumpster, and a cable TB and 0411 goes back on

What trucks used a DBW throttle body in 2000? I thought 2001 was the first year for the C3/Denali/Escalade to use that TB?

Regardless, I should have specified that I was referring to the base engine.

[thump16]

my 04 in my c10 is DBW single feed fuel line off of the rail.

[Painter D]

Originally Posted by Wasted Income

Now that we've narrowed it down to 02/03 you should be good to go. There are no differences between those two years. Any parts you order for one, will fit the other.

What are your plans for this engine?

Im gonna put in my 58swb chevy truck, probably just run a mild tune and call it a day. From the sounds of it ,it would be easier for me to run the dbc throttle body. Can any of you guys recommend a wiring harness for this?
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[65Gregg]

It sounds like you and I are in the same boat, we have an engine and need tons of information to figure out what to do with it. LOL. I think I'm gonna follow your progress and try to learn.

[Wasted Income]

Originally Posted by Painter D

Im gonna put in my 58swb chevy truck, probably just run a mild tune and call it a day. From the sounds of it ,it would be easier for me to run the dbc throttle body. Can any of you guys recommend a wiring harness for this?
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Did your engine come with an PCM and TAC module? If so, it would be the easiest to stay with that.

To switch to DBC, you'd need an older red/blue PCM and matching DBC harness (DBW harnesses don't have a provision for IAC stepper motor...they use the throttle blade for IAC.)

I normally switch over to DBC because with my turbo setups I like to go 2 bar, speed density tunes, which a the time were only available for DBC PCMs.

I've since gotten away from all the OBD2 stuff and went Megasquirt/Megashift.

[Painter D]

Originally Posted by Wasted Income

Did your engine come with an PCM and TAC module? If so, it would be the easiest to stay with that.

To switch to DBC, you'd need an older red/blue PCM and matching DBC harness (DBW harnesses don't have a provision for IAC stepper motor...they use the throttle blade for IAC.)

I normally switch over to DBC because with my turbo setups I like to go 2 bar, speed density tunes, which a the time were only available for DBC PCMs.

I've since gotten away from all the OBD2 stuff and went Megasquirt/Megashift.

Ok first what does pcm, and tac , and iac stand for? My engine came with the computer if thats what youre referring to. I was planning on buying a new stand alone harness which is why I was thinking dbc would be easiest.

Feel free to correct me if Im way off on my thinking.
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[Wasted Income]

Well OMG, WTF....IDK. Haha, ok. I will start on page 1.

PCM = Powertrain control module (controls engine and transmission) = computer

DBC = Drive by Cable

DBW = Drive by Wire

TAC = Throttle Actuation Controller (electronic pedal)

IAC = Idle Air Control

TB = Throttle Body

[Painter D]

Ok , gotcha. I did not get the tac with the motor, which is why I figured the dbc harness and dbc throttle body would be the best way to go. Or am I way off here. Lol

What would be the easiest setup to do with what I have?
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[Wasted Income]

Personally, if you're planning to buy a stand alone harness....I'd get one for a DBC setup, find a truck cable throttle body, and PCM.

Not sure about where you're at...but my local pick-a-part has throttle bodies and PCMs everywhere.

I would find a PCM with the service code "12200411" and have it flashed for your setup. Doesn't matter if it was originally on a V6 or V8....manual or auto. If the serv. # ends in 0411 it can be flashed with the correct operating system for you.

[BR3W CITY]

Originally Posted by Wasted Income

I would find a PCM with the service code "12200411" and have it flashed for your setup. Doesn't matter if it was originally on a V6 or V8....manual or auto. If the serv. # ends in 0411 it can be flashed with the correct operating system for you.

Source on this? When I was sourcing my pcm, my tuner informed me that for my swap (dbw 6l/4l80e, 2003/04) I had to get a v8/auto pcm, because the manual trans pcm had problems with the second vss sensor input from the 4l80e.



On another note, while I agree that its an 03/04 motor, do we KNOW that its actually an Lq9? No external differences from the lq4, I've seen "escalade" motors on CL before that were just lq4's, which is still a great motor.

[Painter D]

Originally Posted by BR3W CITY

Source on this? When I was sourcing my pcm, my tuner informed me that for my swap (dbw 6l/4l80e, 2003/04) I had to get a v8/auto pcm, because the manual trans pcm had problems with the second vss sensor input from the 4l80e.



On another note, while I agree that its an 03/04 motor, do we KNOW that its actually an Lq9? No external differences from the lq4, I've seen "escalade" motors on CL before that were just lq4's, which is still a great motor.

Well how do I find this out? Let me know and Ill get on it.
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[clinebarger]

Verifying the VIN of the vehicle that the engine came from is the easiest way.

8th vin digit U.....LQ4.
8th vin digit N.....LQ9.

Ive had wreaking yards try to pass off LQ4's as LQ9's.

I made a jumper/patch harness (PCM plugs with power, ground & data link connector) & use my Tech 2 to read the VIN thats in the PCM.

[solidaxel]

Originally Posted by clinebarger

Verifying the VIN of the vehicle that the engine came from is the easiest way.

8th vin digit U.....LQ4.
8th vin digit N.....LQ9.

Ive had wreaking yards try to pass off LQ4's as LQ9's.

I made a jumper/patch harness (PCM plugs with power, ground & data link connector) & use my Tech 2 to read the VIN thats in the PCM.

Thanks found the info on page 6!!!!

[ls1nova71]

Originally Posted by BR3W CITY

Source on this? When I was sourcing my pcm, my tuner informed me that for my swap (dbw 6l/4l80e, 2003/04) I had to get a v8/auto pcm, because the manual trans pcm had problems with the second vss sensor input from the 4l80e.

The 411 PCM will work on almost every DBC application... basically 99-02 LS1s and truck engines. It also has the ability to run DBW. Having it run a 4l80e would require a segment swap that most tuning software isn't capable of. Also it wont work with the 03-up TAC. But for a standard DBC setup they're fine. I'm running one in my '33 with an LS1 that came out of an Astro van.
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[Wasted Income]

Here you go.

0411 PCMs for sale