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What size bulb do I need for the reverse light on a 2010 GMC Sierra?
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5 answers
★ Top Answer
The reverse lights for a 2010 GMC Sierra require a 3047 bulb, which is a less common size. Although General Motors used this size for the reverse lights in some vehicles of that generation, it is not as widely used now. A replacement bulb can be purchased for around $4 to $10, depending on the brand and shop. It is not necessary to opt for an OEM bulb as most brands should work well. If you prefer a mechanic to replace the bulb, it will cost you roughly $150.
More answers
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3047 refers to a light that serves as a stop, turn, and tail signal. Meanwhile, 921 is specifically for backup lighting. The 3047 light, which has two components, cannot be used in the backup light socket due to size restrictions.
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3047 or 921, also known as the Center High Mount Stop Lamp (CHMSL).
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The 2010 GMC Sierra reverse light needs a 3047 bulb.
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