Got a diff leak? This GM Genuine Parts pinion gear seal (part number 26064028) is the official OEM replacement for your Chevrolet, Buick, GMC, or Cadillac. It’s designed to prevent differential fluid from leaking out of the pinion area, which is crucial for protecting your gears and bearings. Made to the same specs as the original seal installed at the factory. Installing a pinion seal can be tricky—you’ll need to remove the driveshaft and possibly adjust pinion preload, so it’s often a job for a mechanic. But using a genuine GM seal ensures proper fit and longevity. Keep your differential running smoothly and avoid costly repairs down the road. Always verify this part number matches your vehicle’s needs.
