GM GENUINE
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GM GENUINE 23145791  
$309.79
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GM GENUINE 23145791 Specifications
Cover Bolt Quantity10
Pinion Shaft Diameter (IN)1.31
Pinion Shaft Diameter (MM)33.36
Pinion Spline Count30
Ring & Pinion Gear Ratio3.73
Ring Gear Diameter (IN)8.50
Ring Gear Diameter (mm)215.90
Stay with the parts brand your General Motors vehicle came with and get the quality you know and trust with ACDelco GM Original Equipment parts. ACDelco GM OE replacement parts give you the peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors.

Differential Identification Guide

To order the correct ring & pinion, it's crucial to know the differential type and gear ratio on your vehicle.
  • First, determine your Differential Type.
  • Next, determine the gear ratio on your vehicle using one of the following methods:
    • Count The Teeth: Divide the number of teeth on the ring gear (big gear) by the number of teeth on the pinion gear (small gear). If you have 37 teeth on your ring gear and 12 teeth on your pinion gear, you have a 3.08 Gear Ratio (37 ÷ 12 = 3.08).
    • Verify Through A Dealer: Verify the ratio using your VIN number. This will only be accurate if the differential has not been previously modified.
    • Use Your RPO Code: RPO codes can be found on GM vehicles by referencing the Service Parts Identification sticker (typically located in the glove box compartment or near the spare tire), or by scanning a QR code on 2018 and up vehicles (located at the bottom of the driver side door pillar).


Warranty Information:
24 Month / Unlimited Mile Warranty