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Old 07-23-2018, 07:21 PM   #1
Roundhouseman
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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.
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Old 07-23-2018, 07:25 PM   #2
Roundhouseman
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Re: 91 GMC LSX swap & 96 dash swap

I removed what was left of the broken dash and cut out the steering column bracket.
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Last edited by Roundhouseman; 07-23-2018 at 07:30 PM.
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Old 07-23-2018, 07:32 PM   #3
Roundhouseman
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Re: 91 GMC LSX swap & 96 dash swap

Drilling out the spot welds on the steering column bracket.
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Old 07-23-2018, 07:45 PM   #4
Roundhouseman
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Re: 91 GMC LSX swap & 96 dash swap

Drilled out spot welds.
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Old 07-23-2018, 07:48 PM   #5
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Re: 91 GMC LSX swap & 96 dash swap

The 91 (left) and 96 steering column brackets side by side.
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Old 07-23-2018, 07:50 PM   #6
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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.
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Old 07-23-2018, 07:52 PM   #7
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Re: 91 GMC LSX swap & 96 dash swap

91 and 96 steering columns are very different.
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Old 07-23-2018, 08:19 PM   #8
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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.
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Old 07-23-2018, 10:57 PM   #9
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Re: 91 GMC LSX swap & 96 dash swap

Cool, looking forward to more. Love following well-documented build threads!
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Old 07-24-2018, 02:01 PM   #10
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Re: 91 GMC LSX swap & 96 dash swap

Interesting..... I'm following as well.
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Old 07-25-2018, 08:44 AM   #11
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Re: 91 GMC LSX swap & 96 dash swap

Interesting build. I am in for it also.
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Old 07-25-2018, 01:09 PM   #12
Willie G
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Re: 91 GMC LSX swap & 96 dash swap

Nice Steve. I will be here until the project is finished.
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Old 08-06-2018, 11:47 AM   #13
Roundhouseman
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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.
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Old 08-06-2018, 11:49 AM   #14
Roundhouseman
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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.
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Old 08-08-2018, 10:19 AM   #15
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Re: 91 GMC LSX swap & 96 dash swap

oming along pretty good. Keep it going.
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