Electrical problems

[Macbethvance]

So my 2004 gmc Yukon Denali cluster doesn’t work. I checked all the fuses, check relays speedometer is stuck at 32 mph with vehicle on or off. When I try to switch over to my dims, my light shut off completely, and the cluster doesn’t show that my brights are ever on only when the actual light switch is off. None of the gauges work by the way I should include.

Edited 5 hours ago by Macbethvance
Need to be seen

[davester]

It's common for gmt800 clusters to fail.  Solder joints breaking, stepper motors failing, lights burning out are common failures.

 

You can try soldering any failed joints together, but there are a bunch of surface-mount chips, so you need a decent soldering setup and a steady hand to do a good job of it.

 

Note, your vehicles mileage/engine hours are stored in the cluster, so if you swap to another cluster, you need to program it with your mileage if you want it to be accurate.