Starting problems in a 2003 GMC Sonoma can be caused by several issues, including a weak battery, faulty starter motor, or a failing ignition switch. Additionally, problems with the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can prevent the engine from starting. Checking the battery connections and fuses is also recommended, as corrosion or blown fuses can disrupt the starting process. If the problem persists, diagnostic testing may be needed to pinpoint the exact cause.
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