GMC Sierra 3500 HD fuel gauge malfunction and fuel pump shutdown issue unresolved by dealer on GMC Sierra 3500 HD

Some GMC Sierra 3500 HD owners report experiencing fuel gauge malfunctions, such as the needle being stuck on full or empty, even after driving for extended periods, or reading empty immediately after refueling. Additionally, these owners may encounter symptoms indicative of fuel pump failure, including engine stalling, difficulty starting, poor fuel economy, and unusual noises, which should not be overlooked as they can signal a weakening fuel pump. If the issue persists despite dealer intervention, some owners have successfully resolved fuel gauge problems by replacing the fuel pump assembly, while others seek assistance from trusted mechanics or alternative GMC service centers. It is also advised to document all communications with the dealer and any repair attempts, as this information may be crucial for further escalation or legal action. Lastly, owners should check if their GMC Sierra 3500 HD is still under warranty to ensure that necessary repairs are covered.