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The 2004 Chevrolet TrailBlazer comes with a 78-size battery providing 700 cold cranking amps. Common signs that the battery needs replacing include difficulty starting, sluggish cranking, and a lack of interior lights or chimes. Less common indicators include a clicking noise when trying to start the car, needing to press the gas pedal to start, and misfires. Intermittent charging issues can impact spark plug ignition and the starter solenoid's operation. If the battery is drained, it may be due to a faulty alternator, which can prevent the battery from recharging properly over time. In such cases, have the battery tested, recharged, and consider replacing the alternator.
The Chevrolet Trailblazer from 2004 requires a battery of size 78 to operate.