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2021 GMC Sierra 1500
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Price Match Guarantee
60-Day Returns
Lifetime Replacement
2021 GMC Sierra 1500

2021 GMC Sierra 1500 Crankshaft Seals

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GM Original Equipment Series Crankshaft Seal - Direct Fit, Sold individually
AC Delco®
GM Original Equipment Series Crankshaft Seal - Direct Fit, Sold individually
Part Number: AC12634614
Guaranteed to Fit
$14.99
Vehicle Fitment
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L 2-Door, Standard Cab Pickup
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L 4-Door, Crew Cab Pickup
Product Details
Location : FrontWarranty : 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.

Series : GM Original Equipment SeriesRecommended Use : OE ReplacementProduct Fit : Direct Fit
Crankshaft Seal - Direct Fit, Sold individually
AC Delco®
Crankshaft Seal - Direct Fit, Sold individually
Part Number: AC12693989
Guaranteed to Fit
$14.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 Elevation All Engines 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 AT4 All Engines 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 SLE All Engines 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 Denali All Engines 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Base All Engines 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 SLT All Engines 4-Door, Crew Cab Pickup
Product Details
Location : Front RearwardWarranty : 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
GM Original Equipment Series Crankshaft Seal - Sold individually
AC Delco®
GM Original Equipment Series Crankshaft Seal - Sold individually
Part Number: AC12665076
Guaranteed to Fit
$30.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L 4-Door, Crew Cab Pickup, 6-Speed, Automatic Transmission, transmissionmfrcode : 6L80
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L 4-Door, Crew Cab Pickup, 6-Speed, Automatic Transmission, transmissionmfrcode : 6L80
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L 4-Door, Crew Cab Pickup
Product Details
Location : RearWarranty : 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.

Series : GM Original Equipment Series
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Helpful Automotive Resources

Crankshaft Seal Problems: What Is It, Symptoms, and What To Do
Crankshaft Seal Problems: What Is It, Symptoms, and What To DoThe front seal on an engine with a timing belt plays the same role but is a smaller seal. If the engine has a timing cover (metal timing chain lubricated by splash oil), the seal will only contain splash oil and not pressure.
Rear Main Seal Replacement Tips
Rear Main Seal Replacement Tips Pro Tip: Older engines had a two-piece seal that could be replaced by removing the oil pan and the rear main bearing cap, but that was a