PCM LQ9 swap question

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Apr 8, 2019 | 08:55 PM

Crane91

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PCM LQ9 swap question

I recently bought an LM7 with all the accessories, harness, ppm, gas pedal...everything for a damn good price. I really wanted a 6.0 to swap into my 69 C/10 and a pretty good deal came up on an LQ9. I bought it, but it didn't have the harness, pcm or gas pedal. I plan to install 243 heads, NNBS intake & throttle body, and a cam either stock ls2 or SS2 cam onto the LQ.

My question is, can I use the pcm, harness and gas pedal that came from the LM7 on the LQ9?? Checked the service number on the PCM 12589463.

Apr 8, 2019 | 09:03 PM

01CamaroSSTx

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I think you can as long as your working with the correct sensors for the PCM and engine harness 24x or 58x and you have the right crankshaft reluctor ring 24x or 58x.

Apr 9, 2019 | 11:49 AM

MontecarloDrag

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If you are sure it is a LQ9 (gen3) it will work with the same PCM, pedal, TAC and harness from the LM7 since they are exactly the same.
If the 6.0 is a Gen4 you can still use it but it needs a 58x to 24x converter box.

Apr 9, 2019 | 01:47 PM

Crane91

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Quote:

Originally Posted by MontecarloDrag

is there any way I can tell what it uses without opening the engine up?

Apr 9, 2019 | 01:53 PM

NCDEERE

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Look at the crank position sensor. 24X is black and 58X is gray.

Apr 9, 2019 | 02:07 PM

01CamaroSSTx

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The crank sensor is located on the passenger side of the block next to the starter.

Apr 9, 2019 | 04:03 PM

MontecarloDrag

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It's a lot easier to know.
The gen3 engine has plastic round fuel rails, rear CAM sensor, valley Knock sensors and 75mm TB.
Gen4 has square stainless fuel rails, 90mm TB, different intake, side knock sensors and front CAM sensor.