5.2L Mag or 5.9L Mag Option
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Joined: Apr 2010
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From: Clayton MI
Balancers are different too. 
Aside from that, the engines are pretty much identical. It will bolt right in, and hook right up. Of course, you will need to clue in the PCM to the additional cubes, the 5.2 PCM will tend to run it a bit lean. (till it gets into closed loop anyway.....)
Aside from that, the engines are pretty much identical. It will bolt right in, and hook right up. Of course, you will need to clue in the PCM to the additional cubes, the 5.2 PCM will tend to run it a bit lean. (till it gets into closed loop anyway.....)
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Joined: Dec 2015
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Balancers are different too. Aside from that, the engines are pretty much identical. It will bolt right in, and hook right up. Of course, you will need to clue in the PCM to the additional cubes, the 5.2 PCM will tend to run it a bit lean. (till it gets into closed loop anyway.....)
Aside from that, the engines are pretty much identical. It will bolt right in, and hook right up. Of course, you will need to clue in the PCM to the additional cubes, the 5.2 PCM will tend to run it a bit lean. (till it gets into closed loop anyway.....)
Administrator
Joined: Apr 2010
Posts: 87,467
Likes: 4,220
From: Clayton MI
The 5.2 pcm will run it, however.... (and you just KNEW that was coming..... ) it will tend to run lean when in open loop. Unfortunately, that includes running at large throttle openings...... which can be VERY bad. If you don't drive it hard, it will work ok...... but, I would recommend getting a tuner for it, and simply flash your current PCM to work right with the 5.9. (I think tuners are running around 400 or so these days, with a selection of tunes.) If you are going to stray from purely stock parts, cam, heads, etc, then you would need a custom tune, (which runs about 100 bucks or so more). If you just replace the 5.2 pcm, with a 5.9 pcm, you will need to have it flashed for your VIN, (which any decent shop should be able to do) otherwise, the air bag, and ABS systems will whine, and not work.
Edit: Not to mention, being an 01, your truck already has the 'death flash', which seriously compromises power and low end torque...... Tuner would fix THAT as well.
) it will tend to run lean when in open loop. Unfortunately, that includes running at large throttle openings...... which can be VERY bad. If you don't drive it hard, it will work ok...... but, I would recommend getting a tuner for it, and simply flash your current PCM to work right with the 5.9. (I think tuners are running around 400 or so these days, with a selection of tunes.) If you are going to stray from purely stock parts, cam, heads, etc, then you would need a custom tune, (which runs about 100 bucks or so more). If you just replace the 5.2 pcm, with a 5.9 pcm, you will need to have it flashed for your VIN, (which any decent shop should be able to do) otherwise, the air bag, and ABS systems will whine, and not work.Edit: Not to mention, being an 01, your truck already has the 'death flash', which seriously compromises power and low end torque...... Tuner would fix THAT as well.
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Professional
Joined: Dec 2015
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The 5.2 pcm will run it, however.... (and you just KNEW that was coming..... ) it will tend to run lean when in open loop. Unfortunately, that includes running at large throttle openings...... which can be VERY bad. If you don't drive it hard, it will work ok...... but, I would recommend getting a tuner for it, and simply flash your current PCM to work right with the 5.9. (I think tuners are running around 400 or so these days, with a selection of tunes.) If you are going to stray from purely stock parts, cam, heads, etc, then you would need a custom tune, (which runs about 100 bucks or so more). If you just replace the 5.2 pcm, with a 5.9 pcm, you will need to have it flashed for your VIN, (which any decent shop should be able to do) otherwise, the air bag, and ABS systems will whine, and not work.
Edit: Not to mention, being an 01, your truck already has the 'death flash', which seriously compromises power and low end torque...... Tuner would fix THAT as well.
) it will tend to run lean when in open loop. Unfortunately, that includes running at large throttle openings...... which can be VERY bad. If you don't drive it hard, it will work ok...... but, I would recommend getting a tuner for it, and simply flash your current PCM to work right with the 5.9. (I think tuners are running around 400 or so these days, with a selection of tunes.) If you are going to stray from purely stock parts, cam, heads, etc, then you would need a custom tune, (which runs about 100 bucks or so more). If you just replace the 5.2 pcm, with a 5.9 pcm, you will need to have it flashed for your VIN, (which any decent shop should be able to do) otherwise, the air bag, and ABS systems will whine, and not work.Edit: Not to mention, being an 01, your truck already has the 'death flash', which seriously compromises power and low end torque...... Tuner would fix THAT as well.
Well THIS one doesn't the engine that came out of it was a pretty well modified 5.2 which had a custom flash for it (otherwise woulda ran like junk with all its add on parts) so I guess I'm lucky, but its still not a 5.9 with bolt-on's :P So keeping this PCM you can simply tune it to work properly with a 5.9 with no adverse side-effects?