ECM mounting location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77c10 · 01-25-2016, 03:50 PM

Gathering parts and stuff for a 6.0/4l80E swap into my square. Where is everyone mounting their ECM's? I'd like to mount it under the dash but I have Vintage Air. Looking for alternate places so I know how long to make the wires when I order my harness.

Thanks

**mongocanfly** · 01-25-2016, 05:33 PM

I "crammed" mine behind the dash..i would not do it that way again..under or behind the seat is the only way I would do another one. That's just me.

Wasted Income · 01-25-2016, 05:42 PM

When I build C-10s with factory ECUs I mount them behind the headlight on the core support similar to how they are in a Silverado.

In my Blazer, I mounted my holley on the center hump, under the custom center console.

foamypirate · 01-26-2016, 04:20 PM

Quote:

Originally Posted by 77c10

Gathering parts and stuff for a 6.0/4l80E swap into my square. Where is everyone mounting their ECM's? I'd like to mount it under the dash but I have Vintage Air. Looking for alternate places so I know how long to make the wires when I order my harness.

Thanks

Tejas Steelworks makes a nice bracket to mount the ECM and a fuse box on the driver side inner fender.

https://squareup.com/market/tejasste...-fuse-blocks-x

Oldblue68chevy · 01-28-2016, 02:43 PM

I mounted mine to the rad support that way I didn't have to extend the wire harness. I figured when I pop the hood it will be tight to the support so unless you lean over the front it wont be very noticeable. Of course this did require me to move the battery location.

**dec010974** · 01-28-2016, 08:14 PM

Pm me your number. The pics are in my phone. I will text them to you. The pics won't up to my iPad. My PCM is located on the radiator support as well.

**dec010974** · 01-30-2016, 09:01 AM

Good Luck. Clark.

**dec010974** · 01-30-2016, 09:06 AM

I Hope this helps. Clark

1976K5CHALET · 02-04-2016, 04:41 PM

I prefer under the hood mounting as they were designed to be under the hood. ECM's do quite well outside. In the over the road trucks they have been block mounted for a long time with no issues. Just my thoughts. Here is mine mounted.

DW

foamypirate · 02-04-2016, 04:57 PM

Quote:

Originally Posted by 1976K5CHALET

I prefer under the hood mounting as they were designed to be under the hood. ECM's do quite well outside. In the over the road trucks they have been block mounted for a long time with no issues. Just my thoughts. Here is mine mounted.

DW

That looks great! Looks like you used the Tejas Steelworks mount?

1976K5CHALET · 02-04-2016, 09:06 PM

Tejas Steel Works indeed. I have their radiator shroud that let me run dual 98 F body fans as well.

foamypirate · 02-04-2016, 09:18 PM

Quote:

Originally Posted by 1976K5CHALET

Tejas Steel Works indeed. I have their radiator shroud that let me run dual 98 F body fans as well.

I thought I recognized it! I have the fortunate benefit of living 2 blocks from their shop, so I got to watch my fan shroud get cut out in person.

1976K5CHALET · 02-05-2016, 03:05 AM

Great guys. Take the time to chat with ya and all which is rare these days.

DW

thumpros@yahoo.com · 10-03-2017, 01:51 PM

Because I am the project manager, fabricator, production designer, planner & benefactor - my time is split, so I went for simplicity and adjustable for short and long ecm harness. My cab was just painted so the brake pedal was already removed.
(2) 1/2 inch wide zip tie straps joined-heat-shrink wrapped and routed through the hole that GM already provided, run ties around the top mount through factory holes. Wire loom placed along side rail of brake pedal case (1) miniature flat roller bearing positioned between ECM on brake pedal swivel.(garden hose gasket was first prototype seen on photo before upgrade to mini roller bearing) Piece of cheesy chrome plastic heater control knob optional to add flare and design.

HONDAWASAKI · 06-17-2019, 03:43 PM

Quote:

Originally Posted by thumpros@yahoo.com

Because I am the project manager, fabricator, production designer, planner & benefactor - my time is split, so I went for simplicity and adjustable for short and long ecm harness. My cab was just painted so the brake pedal was already removed.
(2) 1/2 inch wide zip tie straps joined-heat-shrink wrapped and routed through the hole that GM already provided, run ties around the top mount through factory holes. Wire loom placed along side rail of brake pedal case (1) miniature flat roller bearing positioned between ECM on brake pedal swivel.(garden hose gasket was first prototype seen on photo before upgrade to mini roller bearing) Piece of cheesy chrome plastic heater control knob optional to add flare and design.

I love this idea, thanks I'm going to use a variation. I know its an old post, its OK, i'm an old guy.

Gobuffalo · 06-20-2019, 12:57 AM

I made a box for the air cleaner and put the computer, relays and fuses for everything in it.

01-25-2016, 03:50 PM	#1
77c10 Registered User Join Date: Aug 2011 Location: Gallatin, TN Posts: 782	ECM mounting location Gathering parts and stuff for a 6.0/4l80E swap into my square. Where is everyone mounting their ECM's? I'd like to mount it under the dash but I have Vintage Air. Looking for alternate places so I know how long to make the wires when I order my harness. Thanks __________________ 77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint "Cool ain't ever cheap and cheap ain't ever cool"

01-25-2016, 05:33 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: ECM mounting location I "crammed" mine behind the dash..i would not do it that way again..under or behind the seat is the only way I would do another one. That's just me.

01-25-2016, 05:42 PM	#3
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: ECM mounting location When I build C-10s with factory ECUs I mount them behind the headlight on the core support similar to how they are in a Silverado. In my Blazer, I mounted my holley on the center hump, under the custom center console. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

01-28-2016, 02:43 PM	#5
Oldblue68chevy Registered User Join Date: May 2014 Location: Freedom Pa Posts: 139	Re: ECM mounting location I mounted mine to the rad support that way I didn't have to extend the wire harness. I figured when I pop the hood it will be tight to the support so unless you lean over the front it wont be very noticeable. Of course this did require me to move the battery location. Attached Images

01-28-2016, 08:14 PM	#6
dec010974 Senior Member Join Date: Oct 2012 Location: Miami, Florida Posts: 959	Re: ECM mounting location Pm me your number. The pics are in my phone. I will text them to you. The pics won't up to my iPad. My PCM is located on the radiator support as well.

01-30-2016, 09:01 AM	#7
dec010974 Senior Member Join Date: Oct 2012 Location: Miami, Florida Posts: 959	Re: ECM mounting location Good Luck. Clark. Attached Images

01-30-2016, 09:06 AM	#8
dec010974 Senior Member Join Date: Oct 2012 Location: Miami, Florida Posts: 959	Re: ECM mounting location I Hope this helps. Clark Attached Images

02-04-2016, 04:41 PM	#9
1976K5CHALET Senior Member Join Date: Jan 2003 Location: Grand Junction, Colorado Posts: 610	Re: ECM mounting location I prefer under the hood mounting as they were designed to be under the hood. ECM's do quite well outside. In the over the road trucks they have been block mounted for a long time with no issues. Just my thoughts. Here is mine mounted. DW Attached Images __________________ Doug Wright aka K5NUTT over @coloradok5.com Owner of http://groups.yahoo.com/group/ChevyK5BlazerChalets Certified K5 Nut

02-04-2016, 09:06 PM	#11
1976K5CHALET Senior Member Join Date: Jan 2003 Location: Grand Junction, Colorado Posts: 610	Re: ECM mounting location Tejas Steel Works indeed. I have their radiator shroud that let me run dual 98 F body fans as well. __________________ Doug Wright aka K5NUTT over @coloradok5.com Owner of http://groups.yahoo.com/group/ChevyK5BlazerChalets Certified K5 Nut

02-05-2016, 03:05 AM	#13
1976K5CHALET Senior Member Join Date: Jan 2003 Location: Grand Junction, Colorado Posts: 610	Re: ECM mounting location Great guys. Take the time to chat with ya and all which is rare these days. DW __________________ Doug Wright aka K5NUTT over @coloradok5.com Owner of http://groups.yahoo.com/group/ChevyK5BlazerChalets Certified K5 Nut

10-03-2017, 01:51 PM	#14
thumpros@yahoo.com Registered User Join Date: Sep 2014 Location: Grand Prairie, Texas Posts: 24	Re: ECM mounting location Because I am the project manager, fabricator, production designer, planner & benefactor - my time is split, so I went for simplicity and adjustable for short and long ecm harness. My cab was just painted so the brake pedal was already removed. (2) 1/2 inch wide zip tie straps joined-heat-shrink wrapped and routed through the hole that GM already provided, run ties around the top mount through factory holes. Wire loom placed along side rail of brake pedal case (1) miniature flat roller bearing positioned between ECM on brake pedal swivel.(garden hose gasket was first prototype seen on photo before upgrade to mini roller bearing) Piece of cheesy chrome plastic heater control knob optional to add flare and design. Attached Images __________________ 68 C10 LS SWB LM7 5.3 700R4 http://67-72chevytrucks.com/vboard/s...d.php?t=692803 Last edited by thumpros@yahoo.com; 10-03-2017 at 02:13 PM. Reason: Procedure and parts list update

06-20-2019, 12:57 AM	#16
Gobuffalo Registered User Join Date: Mar 2012 Location: Crestline, CA Posts: 225	Re: ECM mounting location I made a box for the air cleaner and put the computer, relays and fuses for everything in it. Attached Images

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