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What type of brake fluid does a 2015 GMC Sierra require for its brakes?
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★ Top Answer
The 2015 GMC Sierra recommends using DOT 3 brake fluid, but can also use DOT 4 without any issues. However, it won't fully benefit from the higher boiling point of DOT 4 during regular use. So, paying extra for DOT 4 may not be worth it. It's mentioned that DOT 4 can be used in a pinch if you have it available. But it's recommended to stick with the brake fluid type used during your last flush, which was probably DOT 3, to avoid mixing different types and ensure optimal performance.
More answers
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In the GMC Sierra of 2015, you should use brake fluid that is rated as DOT 3.
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