What's the 2004 Chevy Silverado 2500HD battery size?

The 2004 Chevy Silverado 2500HD is equipped with a group battery size of 34/78 with 800 cold cranking amps. Signs it needs replaced include a no-start or hard starting, difficulty cranking and a lack of interior lights or chimes. Less common symptoms include a "clicking" sound in the ignition, the necessity of using the gas to start and mIS Fires. Intermittent charging can interfere with spark plug firing and the smooth function of the starter solenoid. If the battery is drained or discharged, it may also be due to a faulty alternator. A healthy battery can become inoperative over time if the alternator cannot re-energize it. Have the it tested, re-charged and the alternator replaced under these circumstances.