The 2003 Chevrolet Suburban runs on flex-fuel (FFV).
The 2003 Chevrolet Malibu runs on regular unleaded.
The 2003 Chevrolet Impala runs on regular unleaded.
The 2003 Chevrolet Tahoe runs on regular unleaded.
The 2003 Chevrolet Express runs on regular unleaded.
The 2003 Chevrolet Corvette runs on premium unleaded (required).
The 2003 Chevrolet Express-Cargo runs on regular unleaded.
The 2003 Chevrolet Silverado-1500 runs on regular unleaded.
The 2003 Chevrolet Tahoe has a 4-speed automatic.
The 2003 Chevrolet Impala has a 4-speed automatic.
The 2003 Chevrolet Express has a 4-speed automatic.
The 2003 Chevrolet Malibu has a 4-speed automatic.