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Thread: Instrument cluster swap

  1. #1
    Join Date
    Mar 2014
    Posts
    16

    Instrument cluster swap

    Okay, ive searched a lot and cannot find a actual write up of how to put a NBS cluster into a OBS truck. What is involved? Cutting and splicing of wires? I almost got a cluster from a 99 Silverado last weekend from the boneyard and was able to find the same year truck as mine, but it wouldnt fit, and there is a pigtail that attaches to the top. I really like the look of the newer style gauges plus id like to have everything function correctly.

    BTW, my truck is a 98 Sierra with a 5.3/4l60e.
    98 Sierra RCSB stepside, 5.3 swap, 4l60e. Go faster mods will begin soon!

  2. #2
    Join Date
    May 2007
    Location
    Oak Forest, Illinois
    Posts
    276
    Why don't your gauges work properly? There have been countless 96-2000 GMT400 trucks with Gen3 engine/PCM's swapped into them.

    Jeff
    98 GMC RCSB 2wd, 100% internally stock 305, w/twin T-3 junkyard turbos,Ramjet intake w/42lb inj,12200411 PCM. 4675lbs w/me in it. Best time in 5 passes 13.01@110

  3. #3
    Join Date
    Mar 2014
    Posts
    16
    The tach doesnt work right and cannot get the coolant gauge to read properly. I know I can get the pcm values reset, but I do not want to send out the pcm again. Plus I want the factory style trans temp gauge.
    98 Sierra RCSB stepside, 5.3 swap, 4l60e. Go faster mods will begin soon!

  4. #4
    Join Date
    May 2007
    Location
    Oak Forest, Illinois
    Posts
    276
    Ok-Got it. The trans temp gauge is a pretty nice added feature.

    Jeff
    98 GMC RCSB 2wd, 100% internally stock 305, w/twin T-3 junkyard turbos,Ramjet intake w/42lb inj,12200411 PCM. 4675lbs w/me in it. Best time in 5 passes 13.01@110

  5. #5
    Join Date
    Mar 2014
    Posts
    16
    Anyone??
    98 Sierra RCSB stepside, 5.3 swap, 4l60e. Go faster mods will begin soon!

  6. #6
    Join Date
    Mar 2014
    Posts
    16
    Nobody wants to give any hints on how they did the cluster swap?
    98 Sierra RCSB stepside, 5.3 swap, 4l60e. Go faster mods will begin soon!

  7. #7
    Join Date
    Jan 2014
    Location
    Las Cruces NM
    Posts
    209
    I think I've only seen one real working cluster swap and I believe he used the harness and all from the newer truck. Everybody talks about doing it but it usually ends up being more trouble than it's worth. If your just wanting to do it to get all your gauges working that's probably not the easiest way. The tach and temp gauges are not hard fixes compared to a whole cluster swap. Just my .02
    97 RCSB . 2WD . 5.3 . 4l60E . E-FANS . PNP 706s . TSP 228R . 3600 STALL . HD2 . VETTE SERVO . 3.73s . 2" DROP
    TURBO IN THE WORKS

  8. #8
    Join Date
    Aug 2014
    Posts
    111
    I've been researching this myself. Not sure what year your motor is? The research I've done is on the 2007 & newer gauge clusters. I'm not sure how much of the following is relevant to pre-2007. That said, you need to run a BCM. The BCM is the gateway between the low speed bus and the high speed bus. The cluster is on the low speed bus and all of the data it needs is on the high speed bus. I've seen at least one thread where it was done. A lot of work and troubleshooting, but doable. If your main goal is just the tranny temp, there are several easier ways to go. http://www.aeroforcetech.com/ http://www.scangauge.com/products/scangaugeii/
    1992 K1500 Blazer.
    L94 & 6L80
    14 Bolt SF axle w/11" brakes & appropriate Combination brake valve, Eaton Trutrac rear posi.
    8000# hidden winch, Rocket Box, KYB Monomax shocks
    285/75R16 Duratracks
    Flat Panel Display Gauge cluster in progress.
    http://www.ls1truck.com/forums/lsx-t...00-blazer.html
    New interior & exterior paint planned.

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