91 GMC LSX swap & 96 dash swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Roundhouseman · 07-23-2018, 07:21 PM

After doing some searching and not finding allot of info on doing a dash swap, I document my conversion here. I purchased the 91 GMC C1500 for $500 a few months ago. It came with a 4.3l V6 and a manual trans. The truck has a dually conversion and is slammed, rear frame is notched and lowered spindles in the front. I pulled the engine @ a month ago and sold it to a friend.

Roundhouseman · 07-23-2018, 07:25 PM

I removed what was left of the broken dash and cut out the steering column bracket.

Roundhouseman · 07-23-2018, 07:32 PM

Drilling out the spot welds on the steering column bracket.

Roundhouseman · 07-23-2018, 07:45 PM

Drilled out spot welds.

Roundhouseman · 07-23-2018, 07:48 PM

The 91 (left) and 96 steering column brackets side by side.

Roundhouseman · 07-23-2018, 07:50 PM

Welded in the 96 steering column bracket. I bolted it to the brake booster and held it in place using a bottle jack and a block of wood.

Roundhouseman · 07-23-2018, 07:52 PM

91 and 96 steering columns are very different.

Roundhouseman · 07-23-2018, 08:19 PM

I will be wiring up the 96 electronics to work with the 91 harness. Looks like I need to swap over to the 96 fuse panel though. The LS engine is a 03 5.3L with a 4L60e.

Big Daddy Bear · 07-23-2018, 10:57 PM

Cool, looking forward to more. Love following well-documented build threads!

SCOTI · 07-24-2018, 02:01 PM

Interesting..... I'm following as well.

**Palf70Step** · 07-25-2018, 08:44 AM

Interesting build. I am in for it also.

Willie G · 07-25-2018, 01:09 PM

Nice Steve. I will be here until the project is finished.

Roundhouseman · 08-06-2018, 11:47 AM

I had to go back to the junk yard and cut the section of the firewall out there the steering wheel goes thru. Keep in mind the Pick Your Parts do not allow you to take a cut off wheel/angle grinder in. I made it past the check in gate with mine and was able to cut what I needed and got scolded on the way out. Oh well, got what I needed.

Learn from my lack of paying attention to the details in the differences in the trucks. The 91 firewall opening has a oval hole and the 96 has a round hole that is flanged. I made some measurements and then cut along folds in the firewall sheet metal.

Roundhouseman · 08-06-2018, 11:49 AM

On another note, this step would have been MUCH easier before I welded in the steering wheel bracket.

Willie G · 08-08-2018, 10:19 AM

oming along pretty good. Keep it going.

07-23-2018, 07:21 PM	#1
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	91 GMC LSX swap & 96 dash swap After doing some searching and not finding allot of info on doing a dash swap, I document my conversion here. I purchased the 91 GMC C1500 for $500 a few months ago. It came with a 4.3l V6 and a manual trans. The truck has a dually conversion and is slammed, rear frame is notched and lowered spindles in the front. I pulled the engine @ a month ago and sold it to a friend. Attached Images

07-23-2018, 07:25 PM	#2
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap I removed what was left of the broken dash and cut out the steering column bracket. Attached Images Last edited by Roundhouseman; 07-23-2018 at 07:30 PM.

07-23-2018, 07:32 PM	#3
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap Drilling out the spot welds on the steering column bracket. Attached Images

07-23-2018, 07:45 PM	#4
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap Drilled out spot welds. Attached Images

07-23-2018, 07:48 PM	#5
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap The 91 (left) and 96 steering column brackets side by side. Attached Images

07-23-2018, 07:50 PM	#6
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap Welded in the 96 steering column bracket. I bolted it to the brake booster and held it in place using a bottle jack and a block of wood. Attached Images

07-23-2018, 07:52 PM	#7
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap 91 and 96 steering columns are very different. Attached Images

07-23-2018, 08:19 PM	#8
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap I will be wiring up the 96 electronics to work with the 91 harness. Looks like I need to swap over to the 96 fuse panel though. The LS engine is a 03 5.3L with a 4L60e.

07-23-2018, 10:57 PM	#9
Big Daddy Bear Registered User Join Date: Jan 2015 Location: Rochester, WA Posts: 259	Re: 91 GMC LSX swap & 96 dash swap Cool, looking forward to more. Love following well-documented build threads! __________________ No bolt or nut in the world will remain tight if you turn it to liquid!!!

07-24-2018, 02:01 PM	#10
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Re: 91 GMC LSX swap & 96 dash swap Interesting..... I'm following as well. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

07-25-2018, 08:44 AM	#11
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,228	Re: 91 GMC LSX swap & 96 dash swap Interesting build. I am in for it also. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

07-25-2018, 01:09 PM	#12
Willie G Registered User Join Date: Feb 2017 Location: PERRIS Posts: 37	Re: 91 GMC LSX swap & 96 dash swap Nice Steve. I will be here until the project is finished.

08-06-2018, 11:47 AM	#13
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap I had to go back to the junk yard and cut the section of the firewall out there the steering wheel goes thru. Keep in mind the Pick Your Parts do not allow you to take a cut off wheel/angle grinder in. I made it past the check in gate with mine and was able to cut what I needed and got scolded on the way out. Oh well, got what I needed. Learn from my lack of paying attention to the details in the differences in the trucks. The 91 firewall opening has a oval hole and the 96 has a round hole that is flanged. I made some measurements and then cut along folds in the firewall sheet metal. Attached Images

08-06-2018, 11:49 AM	#14
Roundhouseman Registered User Join Date: Jun 2018 Location: Lake Elsinore CA Posts: 13	Re: 91 GMC LSX swap & 96 dash swap On another note, this step would have been MUCH easier before I welded in the steering wheel bracket.

08-08-2018, 10:19 AM	#15
Willie G Registered User Join Date: Feb 2017 Location: PERRIS Posts: 37	Re: 91 GMC LSX swap & 96 dash swap oming along pretty good. Keep it going.



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