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10-06-2019, 12:36 PM
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#1 |
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Registered User
Join Date: May 2019
Location: Hathaway Pines, CA
Posts: 121
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How to mount ECM
I am at a point where I need to mount the ECM in this 1963 GMC. My LS1, computer, wire harness, and gas pedal are out of a 2005 Chevy pickup.
Can anyone send photos of where to mount the stock computer for an LS1 swap ? I am looking for the best location everyone else may have found by trial and error How about photos of how to mount the fire by wire pedal ? Where did you have the wiring harness penetrate into the cab ? Thanks |
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10-06-2019, 09:24 PM
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#2 |
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Senior Member
 
Join Date: Feb 2014
Location: new smyrna beach fl / 29 palms cal
Posts: 1,727
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Re: How to mount ECM
You need to go to engine and drivelines then click on LS swap. I put mine under the seat, some people put it on the inside of the firewall others put it on and inner fender
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Hand made A/C vent manifolds for 64-66 trucks adapts any aftermarket A/C to OEM vent Last edited by nsb29; 10-12-2019 at 07:14 PM. |
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10-07-2019, 09:32 AM
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#3 |
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Registered User
Join Date: Mar 2015
Location: Washington State
Posts: 1,654
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Re: How to mount ECM
In my "69 I put it under the radio on the floor, then made a small console to cover it.
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10-07-2019, 11:09 AM
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#4 |
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Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: How to mount ECM
It can go pretty much anywhere you want. The problem with a lot of the truck engine harnesses though is that they are pretty short. You probably won't be able to get it inside the cab without extending the wires. I plan to put mine on the firewall. Really no reason not to, except for cosmetics.
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10-07-2019, 01:35 PM
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#5 |
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Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,671
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Re: How to mount ECM
Under seat if possible....behind dash is 2nd option
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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10-08-2019, 11:38 PM
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#6 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: How to mount ECM
The computer mount off an 2003 s10 zr2 also fits out computer nice and has hole for 3 bolts
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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10-12-2019, 01:46 PM
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#7 |
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Registered User
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
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Re: How to mount ECM
My reworked stock wiring harness (Gen IV 5.3L) is too short for anywhere but on the driver side inner fender of my 65 C10. I plan to try to run my air intake to the drivers side and I'm thinking that the air filter will cover it a bit so it's less noticeable. At least the Gen IV ECM is smaller in size.
Last edited by bigmoe; 10-13-2019 at 07:34 PM. Reason: Damn autocorrect |
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10-13-2019, 10:56 AM
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#8 |
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Post Whore
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,868
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Re: How to mount ECM
this is on my square but I re routed all the wires, shortened them, re pinned them, and kept the PCM in the engine compartment on the driver side inner fender, you can also see my DIY fuse block behind it on the firewall - if I recall correctly the injectors have the shortest wires so they will dictate the final resting place of the PCM but no wires needed lengthening - I did buy some proper tools to help unpinning and crimping the PCM connectors
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10-16-2019, 05:39 PM
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#9 |
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Registered User
Join Date: Dec 2012
Location: Los Banos CA
Posts: 2,705
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Re: How to mount ECM
Post 787.
I kept mine in the engine bay behind the driver headlight area. I moved the horns to the passenger side. http://67-72chevytrucks.com/vboard/s...659275&page=32
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1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR *SOLD* GO  GO!!!
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10-21-2019, 12:41 PM
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#10 |
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Registered User
Join Date: Mar 2017
Location: Clever, Mo
Posts: 69
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Re: How to mount ECM
I had my truck harness lengthened to allow me to put the PCM under the seat. As for the pedal mounting, I would HIGHLY recommend buying the pedal bracket that a fellow member here sells in the LSX classifieds. Top notch.
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'71 C-10 SWB Shop Truck Currently 350/350, soon to be LS'd. 
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10-21-2019, 12:41 PM
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#11 |
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Registered User
Join Date: Mar 2017
Location: Clever, Mo
Posts: 69
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Re: How to mount ECM
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'71 C-10 SWB Shop Truck Currently 350/350, soon to be LS'd.
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