Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.
Confirm the exact control-unit version and the appropriate repair or replacement option before selecting lamps or attempting circuit-board work.
Source: Original question and visible replies. Owner reports and other participants' experiences are distinguished. Next steps are editorial guidance for obtaining diagnosis or clarifying the reported findings; they are not a verified repair procedure or an independently confirmed component diagnosis.
2003 Silverado Dash Lights
The owner of a 2003 Silverado reported a failed light for an A/C temperature slider. After opening the control unit, the owner found soldered lamps and said moving a small lamp socket made the light work intermittently.
Reported outcome: No completed lamp replacement or lasting repair was reported.
The owner suspected a socket connection, but the lamp specification and actual fault were not established. The dealer's historical module price is not a current estimate.
