There's no specific "rust warranty" listed in the standard Chevrolet warranty for a 2008 Malibu. Chevrolet warranties generally cover defects in materials and workmanship, but rust is typically considered damage resulting from environmental exposure rather than a manufacturing defect. Therefore, rust would not be covered under the standard powertrain or bumper-to-bumper warranty.
Some states have lemon laws that might cover significant rust issues if it's deemed to be a result of a manufacturing defect (like a poorly applied or compromised paint job that led to premature rust). However, this is highly case-specific and would require legal consultation.
