The exact coolant your Sierra 1500 takes, the color, how much the system holds, and when to change it. The coolant type is straight from the owner's manual — the real authority — so you buy the right jug the first time.
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Coolant type
From the owner's manual. The coolant type is a single-source spec — your owner's manual or the OEM parts catalog is the authority, and it's the final word.
Change interval
First: 150,000 mi
Then: every 150,000 mi
Havoline · CCT 6.6/10
The coolant type is a single-source spec from the owner's manual or OEM parts catalog — we never dress that up as cross-checked against two sources, because it isn't. The system capacity carries our verified badge only when two independent sources agree on it. Coolant color is a rough hint at chemistry, not a guarantee — match the spec, not the color, and never mix families. Your owner's manual is always the final word.
