89 two gauge cluster to 90 five gauge cluster

[kmehr]

Did some searching and didn't quite find the info I needed. I have an 89 Cheyenne with the 2 gauge cluster (only fuel and speed). I'm not really trusting the computer to tell me when it's over heating, so I picked up a 5 gauge cluster from a 90. How plug and play is this going to be? Where do I look to see if I'm prewired for the additional gauges and that the sending units for voltage/oilpressure/coolant temp are?

 

[kmehr]

I'll reserect this thread since I just did this swap. My truck appears to be pre-wired for all of the 5 gauges, as they are all working just by swapping the two clusters. Only downside is that my truck now has another 143,000 miles on it because the cluster came from a really high mileage truck haha!

 

[df2x4]

I'll reserect this thread since I just did this swap. My truck appears to be pre-wired for all of the 5 gauges, as they are all working just by swapping the two clusters. Only downside is that my truck now has another 143,000 miles on it because the cluster came from a really high mileage truck haha!

Can't you just swap the odometers in the clusters like you can with the newer ones? This write up is for 95+ but I'd imagine the process is very similar.

http://www.gmt400.com/threads/how-t...cluster-swap-odometer-swap-step-motors.22821/

 

[kmehr]

I didn't really see any way to pull the odometer out. Turns out the oil pressure gauge and temp gauge are not working. I have the service manuals, but they are pretty pitiful. My fear is that the truck isn't wired for those...

 

[michael hurd]

If your old cluster is for idiot lights, perhaps the sending unit is different for a gauge? Maybe check a few places online.

 

[kmehr]

just ordered new senders from the local parts store, apparently there is a difference between the senders for switch/light only and the full gauges.

there is surprisingly little online about this swap.

 

[sgmbald1]

Did replacing the senders work.

 

[kmehr]

The sending units worked. At least I was able to get the coolant temp gauge to work. Before I ended up replacing the oil pressure unit, my motor gave up the ghost...

 

[Ironhead]

Ouch! Too bad on the motor. Since you seem to like to improve things, now is your chance to drop in a 454!!

 

[skylark]

Ouch! Too bad on the motor. Since you seem to like to improve things, now is your chance to drop in a 454!!

Why not keep the small block with a mild performance build instead of swapping in a boat anchor and having to buy an eco-mobile just to afford to drive the truck? There are newer options available too.