The dashboard in a 2003 Chevrolet Silverado may stop working due to several common issues, such as a blown fuse, a faulty instrument cluster, or broken wiring connections. Additionally, problems with the vehicle's body control module (BCM) can also cause dashboard malfunctions. Checking the fuses and connections first is advisable, as these are often the simplest fixes. If those are intact, further diagnostics may be needed to identify more complex issues.
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Bad dash ground.
Lose of power or ground since all the gauges quit working.
If both the speedometer and odometer stopped working it is probably the speed sensor in the transmission gone bad. If only the speedometer quit you may have to replace the dash cluster with a reconditioned unit.
check the fuse panel
GM. quit uesing Carburetors back in 1987. Everything is now fuel injected.
I have a 84 camaro and went all winter without heat,I asked my boyfriend to see what could be the problem,well that did not accomplish anything,so I changed the fuse,guess what I have heat...
Blown fuse.
check your ground wires...they might be loose or detached.
The two items commonly share a power fuse.
There are several things that can cause your 2000 Cadillac dashboard lights to quit working. The most common cause is a blown fuse.
the dashboard cluster could have broken. That happened to my 2004 trailblazer and I had to get it replaced