The 2021 GMC Sierra 1500 is typically fitted with a BCI Group 48/H6 battery — Flooded lead-acid chemistry recommended. The Raya Energy catalog has 2 matching ZITEX SKUs.
How many CCA does a 2021 GMC Sierra 1500 need?
OEM specifies at least 720 CCA (cold cranking amps). In Canadian winters, anywhere from 720 to 864 CCA is sensible — higher CCA gives more starting headroom on the coldest mornings without affecting normal operation.
Does my 2021 GMC Sierra 1500 need AGM?
AGM isn't required for the standard 2021 GMC Sierra 1500 fitments listed above — flooded chemistry is fine. AGM is still a sensible upgrade for cold-climate use or high-accessory-load vehicles.
