1990 gmc sierra cluster swap
11-09-2018, 07:09 AM
#2
TECH Enthusiast
Directly, because yours has gone bad? 1988-1990 only. And they're basically the same cluster although there are some really basic idiot-light style ones in some of those trucks, too. If you change between idiot light/gauge style you gotta change the senders too.
If you want to swap because you want needle gauges and a tach, well, it gets trickier. SOME, not all, 1991 models had needle gauges w/tach. If you can find this cluster you can swap it into your 90 but you have to move 3 wires around in the harness connector, no biggie, the hard part is finding the cluster.
Also any 1988-1991 cluster you swap in will likely need the speedometer recalibrated unless you get it from a donor truck that came originally with the same tire size and axle ratio as yours. Also fairly easy to do, I did a pic write-up linked in the FAQ post over on Chevytalk 88-98 truck section.
Much easier to find needle/tach cluster from a 1992-1994 but much more work to swap in. Bunch of wiring work, and addition of the DRAC module, which also needs recalibrating. There's a write-up on this swap that was on FullsizeChevy but I think that forum is gone, it's probably been duplicated elsewhere though...like on my site: http://www.someotherplace.com/info/c...p/cluster.html <-- please note I did not write this information and do not take credit for it or guarantee its accuracy, it's just an archived copy of someone else's post.
Richard
If you want to swap because you want needle gauges and a tach, well, it gets trickier. SOME, not all, 1991 models had needle gauges w/tach. If you can find this cluster you can swap it into your 90 but you have to move 3 wires around in the harness connector, no biggie, the hard part is finding the cluster.
Also any 1988-1991 cluster you swap in will likely need the speedometer recalibrated unless you get it from a donor truck that came originally with the same tire size and axle ratio as yours. Also fairly easy to do, I did a pic write-up linked in the FAQ post over on Chevytalk 88-98 truck section.
Much easier to find needle/tach cluster from a 1992-1994 but much more work to swap in. Bunch of wiring work, and addition of the DRAC module, which also needs recalibrating. There's a write-up on this swap that was on FullsizeChevy but I think that forum is gone, it's probably been duplicated elsewhere though...like on my site: http://www.someotherplace.com/info/c...p/cluster.html <-- please note I did not write this information and do not take credit for it or guarantee its accuracy, it's just an archived copy of someone else's post.
Richard
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