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Old 12-07-2009, 11:24 PM   #1
68 short step
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LS series PCM mounting
ive gotten a few questions on where/ how i mount my PCM for the LS (4.8 5.3 5.7 6.0) engines.... i use the factory truck PCM mount, cut off the backside (so im left with a box)....then i make some angles, one side 'rests' inside the factory notch on the firewall (the one im pointing to), this also locates it...then you can either weld the tabs on, or drill holes in them and bolt them to the firewall.....the PCM simply slides/snap in the holder, makeing for easy removal if neccessery...
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Old 12-08-2009, 01:56 AM   #2
Ackattack
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Re: LS series PCM mounting
looks nice

I mounted mine on a sheet metal mounting plate on the inside of the firewall.
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Old 12-08-2009, 02:29 AM   #3
POPO1984
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Re: LS series PCM mounting
I dont know about mounting it there. Its gonna be pretty hard to get to once engine and trans are in
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Old 12-08-2009, 08:17 PM   #4
68 short step
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Re: LS series PCM mounting
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I dont know about mounting it there. Its gonna be pretty hard to get to once engine and trans are in
i have it mounted there in my black truck, ive had to change the computer in it before...took all of 5 mins, and 4 of which were getting the screws loose to get the PCM connectors off.
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Old 12-09-2009, 09:18 PM   #5
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Re: LS series PCM mounting
I guess you have to have your motor mounts set just right to have sufficient clearance to access it right? Just saying, when you mount your motor in the frame, is it possible to have it mounted too far back?

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Old 02-13-2016, 09:39 PM   #6
elf w/capital T
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Re: LS series PCM mounting
shnnaaazzzyyy
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Old 02-13-2016, 11:31 PM   #7
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Re: LS series PCM mounting
Quote:
Originally Posted by 68 short step View Post
ive gotten a few questions on where/ how i mount my PCM for the LS (4.8 5.3 5.7 6.0) engines.... i use the factory truck PCM mount, cut off the backside (so im left with a box)....then i make some angles, one side 'rests' inside the factory notch on the firewall (the one im pointing to), this also locates it...then you can either weld the tabs on, or drill holes in them and bolt them to the firewall.....the PCM simply slides/snap in the holder, makeing for easy removal if neccessery...
Mine would not fit there for sure. Seems it would be a hassle to take out. I mounted mine on the core support under where the battery used to be and use a stock cover. It's easy to get to there. I guess if you don't have to pull it a lot it would clean up the engine bay but I choose to ste my engine rearward for better weight distribution...
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Old 02-23-2016, 05:19 PM   #8
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Re: LS series PCM mounting
I mounted mine behind the dash between the column and the radio.
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Old 02-23-2016, 07:13 PM   #9
72MARIO
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Re: LS series PCM mounting
Chris. Was your harness a uncluttered stock lenght harness ?
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Old 02-25-2016, 02:36 AM   #10
Chris Coufal
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Re: LS series PCM mounting
Yep......stock harness that I had Ken W. make stand alone. It was not lengthened.
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Old 03-03-2016, 03:39 PM   #11
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Re: LS series PCM mounting
Passenger's side core support...
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Old 03-03-2016, 05:54 PM   #12
Willie Makeit
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Re: LS series PCM mounting
Mine is similiar to Rob's above except its on the driver's side and the harness connectors enter from below. had numerous folks ask me where I had it hidden and it was right there in front of them.
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Old 03-03-2016, 06:24 PM   #13
michael bustamante
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Re: LS series PCM mounting
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Originally Posted by Chris Coufal View Post
Yep......stock harness that I had Ken W. make stand alone. It was not lengthened.
i need my harness modified as well, does he do this as a business?
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Old 03-23-2016, 01:47 AM   #14
Chris Coufal
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Re: LS series PCM mounting
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i need my harness modified as well, does he do this as a business?
Yep.....great guy to work with and takes time to explain everything and even give you all the part numbers you need to order for stuff like fuel setup.

http://www.standaloneharness.com/
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Old 03-23-2016, 10:31 AM   #15
foamypirate
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Re: LS series PCM mounting
Not the best picture, but I am using the Tejas Steelworks ECM mount with a small mod to my ECM mounting (longer standoffs) due to my harness routing.
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