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Old 03-09-2024, 10:38 PM   #1
Pampas56
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seat and dash swap

I have a 1989 K2500eclb with a 40/60 bench seat, A friend has a wrecked late 90's truck with a Tan/Brown 60/40 seat with the fold down center console.

How much work will it be to swap the front and back seats from one to the other?

I also want to get rid of the hacked wiring, moon gauges and internal DRAC in my dash. Would it be possible to swap the WHOLE wiring harness from a 92-94 truck into my dash?

I know wiring, but wonder how similar the harnesses will be.

Steve
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Old 03-10-2024, 07:26 AM   #2
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Re: seat and dash swap

Seats are easy swap, just unbolt old and rebolt the newer stuff. I believe there is wiring difference betweeen the 2 style dashes, what they are and how hard it is t swap between the 2 I do not know.
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Old 03-10-2024, 03:19 PM   #3
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Re: seat and dash swap

I do know the DRAC is in a different location, but am curious if there are any other major differences.

I am a retired Electrician, so soldering and changing connectors is not a problem. I plan on changing out the WHOLE harness if possible.
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Old 03-12-2024, 04:47 PM   #4
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Re: seat and dash swap

I wired a DRAC into my '88 k2500, so I have spent some time looking at the schematics. Both schematics are available on this site in a post in the FAQ section. I just looked at the '90 and '93 and it looks like the bulkhead connectors and the ECM connectors have the same pin numbers. Of course you will want to confirm every pin. The cluster connector and DRAC connector will be on the donor harness so you wont have to repin under the dash if you get everything.
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Old 03-13-2024, 01:18 PM   #5
hatzie
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Re: seat and dash swap

95 up will be quite different from 94 and prior.
1989 is TBI. 95 and later has Vortec spider injection. The dash pod itself is quite different.

Can it be done? Sure. It's a bunch of work.

You'll need the service manuals for the donor chassis to sort out the wiring differences or just swap the whole enchilada over to your '89 including the Vortec heads and fuel system.
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Old 03-13-2024, 05:15 PM   #6
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Re: seat and dash swap

An easier way to get rid of the moonies and gain a tach is to install a 1991 cluster.

http://67-72chevytrucks.com/vboard/s...d.php?t=313815
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Old 03-14-2024, 05:50 PM   #7
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Re: seat and dash swap

Quote:
Originally Posted by hatzie View Post
95 up will be quite different from 94 and prior.
1989 is TBI. 95 and later has Vortec spider injection. The dash pod itself is quite different.

Can it be done? Sure. It's a bunch of work.

You'll need the service manuals for the donor chassis to sort out the wiring differences or just swap the whole enchilada over to your '89 including the Vortec heads and fuel system.
95 was TBI still. Its also a bastard child that everyone should avoid lol.
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Old 03-15-2024, 06:44 PM   #8
hatzie
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Re: seat and dash swap

Quote:
Originally Posted by Tom View Post
95 was TBI still. Its also a bastard child that everyone should avoid lol.
1995 still had ALDL onboard diagnostics using an OBDII jack. The Tech2 was almost the only diag tool that would talk to the 1995 T400 trucks.
I'd guess the old Snap On MT2500 Red Brick with the correct domestic cartridge and personality key(s). The MODIS EEMS300, Solus EESC310, & Solus Pro EESC316 would talk to it too as long as you had the correct personality key(s).

I remember reading somewhere that the 1995 4L60E transmission was 1995 only too for some reason. I've forgotten why.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.

Last edited by hatzie; 04-01-2024 at 11:29 AM.
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Old 04-01-2024, 08:55 AM   #9
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Re: seat and dash swap

The only problem I've had in the 9 1/2 years I've owned my bastard is replacing the heater controls, due to being one year only connections. That was easily remedied with adapting 95 harness to 96-00 control.

I'm reading that Pampas56 has an '89 he wants to install a 92-95 cluster in. So, physically the same dash. That should be a non-issue with simple harness adapting/converting.
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