'I don’t understand why people keep buying them' GM master mechanic films a huge oil leak in a 2025 GMC Sierra TurboMax with just 3,800 miles
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'I don’t understand why people keep buying them' GM master mechanic films a huge oil leak in a 2025 GMC Sierra TurboMax with just 3,800 miles
Via @performancetransmission/TikTokBrandon Sloan is a GM Master Automotive Technician, transmission rebuilder, and content creator operating out of South Carolina. The mechanic has one million followers on TikTok, where he shares customer stories and insights under the handle @performancetransmission. He recently filmed a 2025 GMC Sierra that showed up at the shop with a shocking oil leak. Customer states, “I’ve got an oil leak at 3,800 miles” …
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