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2021 GMC Sierra 3500 HD

2021 GMC Sierra 3500 HD Pinion Seals

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Pinion Seal - Direct Fit
Part Number: AC84757357
Guaranteed to Fit
$41.49
Vehicle Fitment
  • 2021 GMC Sierra 3500 HD Base 8 Cyl 6.6L 170.8 in. Wheelbase, DUAL REAR WHEEL, RIDE & HANDLING(DZW), 3.73R(GT4), POSITRACTION L/SLIP R/AXL(G80)
  • 2021 GMC Sierra 3500 HD SLE 8 Cyl 6.6L 176.7 in. Wheelbase, DUAL REAR WHEEL, RIDE & HANDLING(DZW), 3.42 Ratio(GU6), POSITRACTION L/SLIP R/AXL(G80)
  • 2021 GMC Sierra 3500 HD SLT 8 Cyl 6.6L 4-Door, Crew Cab Pickup, 158.9 in. Wheelbase, 3.42 Ratio(GU6), POSITRACTION L/SLIP R/AXL(G80)
  • 2021 GMC Sierra 3500 HD Denali 8 Cyl 6.6L 4-Door, Crew Cab Pickup, 158.9 in. Wheelbase, 3.42 Ratio(GU6), POSITRACTION L/SLIP R/AXL(G80)
  • 2021 GMC Sierra 3500 HD AT4 8 Cyl 6.6L 4-Door, Crew Cab Pickup, 158.9 in. Wheelbase, 3.73R(GT4), POSITRACTION L/SLIP R/AXL(G80)
Product Details
Warranty : 24-months or unlimited mile AC Delco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementProduct Fit : Direct Fit
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Bad Pinion Seal Symptoms
Bad Pinion Seal SymptomsThe differential doesn’t have an oil pump; the gears just spin in the oil, which is contained within the differential case. The oil level is usually supposed to be at the base of the fill hole, but there is no indication of any kind that the differential oil is low