There is 2 Fuses in Fuse / Relay Panel under HoodFuses "IPC / DIC" & "IGN E"
Both 10 amp (red)
GMC has had problems with the "Stepper Motors" used in the Guages & has a "Extended Warranty" to cover vehicles manufactured "before" March 1, 2005Otherwise the Cluster may need Replacing & / or Programming via Dealer Scan Tool
apprx 1 hour labor
Your DEPOSIT is not payment
I have sent the information you have requested & have answered .
checked both your suggested fuses with ohm meter both good anything else that might be problem
Check the ORANGE & PINK wires at the Cluster with Key On for Voltage
If you have Voltage, then use of Dealer Scan Tool should be used to Test Cluster prior to Replace