I'm curious why GM recommends this. Every truck I've owned called for fill till it runs out the hole. That goes for T cases, diffs ect. 1 5/8 below the fill hole would seemingly starve the wheel bearings.
Rear Differential Fill Level Question
Any tricks and tips for not overfilling my 2003 Sierra 1500 Z71 rear differential fluid. The factory recommendation is to fill 5/8" to 1 5/8" below the fill hole when the oil is cold. Thanks for sharing your wisdom.
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