How to Replace the Front Crankshaft Seal for Engines LH6, LY6, L76, and L92 on GMC Sierra 3500 Classic?

The replacement process for crankshaft front oil seal 140 on engines LH6, LY6, L76, and L92 requires initial crankshaft balancer removal followed by removal of the front cover seal 140. Failure to lubricate the oil seal sealing surface together with avoiding reuse of the crankshaft front oil seal constitutes essential requirements for this procedure. Clean engine oil should be used to lubricate both the new oil seal (140) outer edge and the front cover oil seal bore before installation starts. The procedure starts with installing the crankshaft front oil seal (140) onto the guide of Crankshaft Front Oil Seal Installer (J 41478). Use the threaded rod of J 41478 along with its nut and washer and guide and oil seal to insert into the crankshaft end for proper oil seal installation into the cover bore. Utilize a wrench to secure the installer bolt hex while another wrench turns the installer nut clockwise to deliver the seal completely inside the cover bore. Check the front cover bore for correct and even installation of the oil seal after using the J 41478 tool to install the component. Finally, reinstall the crankshaft balancer.

OEM GMC Sierra 3500 Classic Crankshaft Seal

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5 Crankshaft Seals found

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GMC Sierra 3500 Classic Rear Main Seal
Part Number: 97209342
$46.96 MSRP: $79.94
You Save: $32.98 (42%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal, Engine Rear Main Bearing; Crankshaft Seal
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
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GMC Sierra 3500 Classic 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:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS
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GMC Sierra 3500 Classic Timing Cover Oil Seal, Front
Part Number: 12580743
$15.73 MSRP: $25.92
You Save: $10.19 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal Assembly-Crankshaft Front Oil; Timing Cover Gasket; Timing Cover Seal; Cover Seal; Front Cover Seal; Seal, Engine Front Cover & Crankshaft Seal; Seal, Engine Crankshaft Front
- Position: Front
- Replaces: 12559279
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Classic Front Crank Seal
Part Number: 97209341
$39.66 MSRP: $68.11
You Save: $28.45 (42%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal, Engine Crankshaft Front; Timing Cover Gasket; Timing Cover Seal; Front Seal; Cover Seal; Front Cover Seal; Seal, Engine Front Cover & Crankshaft Seal; Seal, Engine Front Cover
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Rear Main Seal
Part Number: 12587621
$36.51 MSRP: $62.70
You Save: $26.19 (42%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal, Engine Rear Main Bearing; Crankshaft Seal
- Position: Rear
- Replaces: 12559277
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS

GMC Sierra 3500 Classic Crankshaft Seal

Our website offers an extensive catalog of genuine GMC Sierra 3500 Classic Crankshaft Seal at unbeatable prices. Every OEM GMC Sierra 3500 Classic 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 3500 Classic Crankshaft Seal Parts Questions & Experts Answers

Front Crank Seal
97209341
Q: How to Replace the Front Crankshaft Seal for Engines LH6, LY6, L76, and L92 on GMC Sierra 3500 Classic?
A: The replacement process for crankshaft front oil seal 140 on engines LH6, LY6, L76, and L92 requires initial crankshaft balancer removal followed by removal of the front cover seal 140. Failure to lubricate the oil seal sealing surface together with avoiding reuse of the crankshaft front oil seal constitutes essential requirements for this procedure. Clean engine oil should be used to lubricate both the new oil seal (140) outer edge and the front cover oil seal bore before installation starts. The procedure starts with installing the crankshaft front oil seal (140) onto the guide of Crankshaft Front Oil Seal Installer (J 41478). Use the threaded rod of J 41478 along with its nut and washer and guide and oil seal to insert into the crankshaft end for proper oil seal installation into the cover bore. Utilize a wrench to secure the installer bolt hex while another wrench turns the installer nut clockwise to deliver the seal completely inside the cover bore. Check the front cover bore for correct and even installation of the oil seal after using the J 41478 tool to install the component. Finally, reinstall the crankshaft balancer.