What is the 2003 chevy tahoe battery size?

The 2003 Chevy Tahoe uses a group 34/78 battery and it needs to have at least 740 cold cranking amps. The cold cranking amps is the MINImum output amperage of the vehicle at freezing temperatures, so a higher cold cranking amps rating means that Your vehicle will start easily in cold conditions. There are two types of batteries that are common on the market these days, AGM and lead acid. AGM batteries are a newer technology that use a gel and matts in them compared to lead acid plates in a standard battery. An AGM battery does not need to be serviced like a standard lead acid battery, and they usually have a longer life than them as well.