Vehicle Questions and Answers
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The 2018 GMC Sierra 1500 truck requires a 921 bulb for its reverse lights. This bulb size is commonly available in stores or online at a price ranging from $10 to $20 for a pair. Opting for long-life bulbs would be a wise choice as they are more cost-effective and can last for several years without needing replacement. If you prefer to have a professional replace these bulbs for you, expect to pay between $130 and $200 for the service.
The size of the reverse light bulb for a 2018 GMC Sierra is H11.