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The best way to address GM 6L45, 6L50, 6L80 and 6L90 pressure regulator valve problems is by replacing a wear-prone OE valve with an improved #Sonnax drop-in Zip Valve™ or oversized part. Installation requires drilling a small hole in the pump, though, to prevent excessive line pressure. Learn more about why drilling is necessary and watch the simple, step-by-step process in this quick video. Featured parts: • Drop-In PR Valve (# 104520-14K): https://www.sonnax.com/parts/5004 • Drop-In Zip Kit®
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