How to replace the rear crankshaft seal on GMC Sierra 1500?

First, remove the Flywheel in order to replace the crankshaft rear oil seal. Use a flat-tipped screw driver to gently remove the seal from the housing at the access notches and discard the used seal. Clean out any dirt or rust around the area followed by the application of 2 to 3 drops of clean engine oil to the bore of the housing or the outer diameter of the engine Flywheel pilot flange, and the outer diameter of Flywheel location pin or the Crankshaft Seal surface. Make sure the new reverse style seal is in the right position and reads "this side out" on it. Check the j 35621-b (J 35621-B) flange for imperfections that could damage the total new seal by minimizing small imperfections with fine grade emery cloth. Prevent the seal lip surface from coming in contact with oil or lubricants. Take the sleeve out of the seal, and apply 2 to 3 drops of clean engine oil to the outside diameter. Mount the seal to the j 35621-b (J 35621-B) and back onto the crankshaft, hand torquing the tool bolts into position. Proper alignment of the crankshaft rear oil seal is very important; mount it near flush and square to the back of crankshaft rear oil seal housing so as not to fail. Turn the j 35621-b (J 35621-B) wing nut clockwise until the seal is positioned as close to flush and square within the housing as possible, feeling that the seal reached the bottom of the housing bore. Afterward, rotate the wing nut counter clockwise to extricate the j 35621-b (J 35621-B) from the seal, take the tool, wipe it with a clean cloth, if necessary, of extra engine oil, and thereafter, instill the engine Flywheel.

OEM GMC Sierra 1500 Crankshaft Seal

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9 Crankshaft Seals found

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GMC Sierra 1500 Rear Main Seal, Front
Part Number: 14090906
$21.11 MSRP: $34.77
You Save: $13.66 (40%)
ADD TO CART
Product Specifications
- Other Name: Seal, Engine Front Cover & Crankshaft Seal; Timing Cover Gasket; Timing Cover Seal; Oil Seal; Crankshaft Seal; Front Crank Seal; Timing Cover Seal; Front Cover Seal; Engine Front Cover Seal.
- Position: Front
- Replaces: 12577710
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra 1500 | WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Rear Main Seal
Part Number: 89060436
$24.24 MSRP: $39.93
You Save: $15.69 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal Kit, Crankshaft Rear Oil; Crankshaft Seal; Seal Kit, Engine Rear Main Bearing; Seal, Engine Rear Main Bearing
- Position: Rear
- Replaces: 12550574, 12585671, 89018162
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2013 GMC Sierra 1500 | Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Rear Main Seal
Part Number: 12665076
$27.20 MSRP: $44.80
You Save: $17.60 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal, Engine Rear Main Bearing; Crankshaft Seal
- Position: Rear
- Replaces: 12634615
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Crankshaft Seal, Front
Part Number: 12634614
$12.80 MSRP: $21.09
You Save: $8.29 (40%)
ADD TO CART
Product Specifications
- Other Name: Seal Assembly-Crankshaft Front Oil; Timing Cover Gasket; Timing Cover Seal; Front Crank Seal; Front Seal; Cover Seal; Front Cover Seal; Seal, Engine Front Cover & Crankshaft Seal
- Position: Front
- Replaces: 12693255
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Oil Seal, Front
Part Number: 10128316
$21.07 MSRP: $34.70
You Save: $13.63 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal, Engine Front Cover & Crankshaft Seal; Timing Cover Gasket; Timing Cover Seal; Oil Filter Seal; Front Seal; Timing Cover Oil Seal; Crankshaft Seal
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2007 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Rear Main Seal
Part Number: 89018163
$26.91 MSRP: $44.33
You Save: $17.42 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Kit, Crankshaft Rear Oil; Crankshaft Seal; Seal Kit, Engine Rear Main Bearing
- Position: Rear
- Replaces: 12555769
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2013 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Rear Cover, Lower
Part Number: 55515618
$68.88 MSRP: $107.89
You Save: $39.01 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Cover Assembly-Timing Chain Lower; Crankshaft Seal; Timing Cover; Rear Main Seal Retainer; Rear Main Seal Housing; Housing
- Position: Lower
- Replaced by: 40009071
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Sierra 1500 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
View related parts
GMC Sierra 1500 Crankshaft Seal, Front
Part Number: 55509254
$9.04 MSRP: $14.16
You Save: $5.12 (37%)
ADD TO CART
Product Specifications
- Other Name: Seal Assembly-Crankshaft Front Oil; Timing Cover; Front Crank Seal; Front Cover; Seal, Engine Front Cover & Crankshaft Seal
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Sierra 1500 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
View related parts
GMC Sierra 1500 Rear Main Seal
Part Number: 40009072
$11.93 MSRP: $18.68
You Save: $6.75 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal, Engine Rear Main Bearing
- Position: Rear
- Replaces: 55506777, 55515617
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Sierra 1500 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL

GMC Sierra 1500 Crankshaft Seal

Our website offers an extensive catalog of genuine GMC Sierra 1500 Crankshaft Seal at unbeatable prices. Every OEM GMC Sierra 1500 Crankshaft Seal comes with a manufacturer's warranty, an easy return policy, and rapid delivery service. Don't miss out on this great opportunity!

GMC Sierra 1500 Crankshaft Seal Parts Questions & Experts Answers

Rear Main Seal
89060436
Q: How to replace the rear crankshaft seal on GMC Sierra 1500?
A: First, remove the Flywheel in order to replace the crankshaft rear oil seal. Use a flat-tipped screw driver to gently remove the seal from the housing at the access notches and discard the used seal. Clean out any dirt or rust around the area followed by the application of 2 to 3 drops of clean engine oil to the bore of the housing or the outer diameter of the engine Flywheel pilot flange, and the outer diameter of Flywheel location pin or the Crankshaft Seal surface. Make sure the new reverse style seal is in the right position and reads "this side out" on it. Check the j 35621-b (J 35621-B) flange for imperfections that could damage the total new seal by minimizing small imperfections with fine grade emery cloth. Prevent the seal lip surface from coming in contact with oil or lubricants. Take the sleeve out of the seal, and apply 2 to 3 drops of clean engine oil to the outside diameter. Mount the seal to the j 35621-b (J 35621-B) and back onto the crankshaft, hand torquing the tool bolts into position. Proper alignment of the crankshaft rear oil seal is very important; mount it near flush and square to the back of crankshaft rear oil seal housing so as not to fail. Turn the j 35621-b (J 35621-B) wing nut clockwise until the seal is positioned as close to flush and square within the housing as possible, feeling that the seal reached the bottom of the housing bore. Afterward, rotate the wing nut counter clockwise to extricate the j 35621-b (J 35621-B) from the seal, take the tool, wipe it with a clean cloth, if necessary, of extra engine oil, and thereafter, instill the engine Flywheel.