How to replace the rear crankshaft seal in V8 engine on 2005 Chevrolet Trailblazer?

Remove the transmission. Remove the driveplate. Pop the Crankshaft Seal off the rear cover by using a screwdriver; one should be very careful not to mar the crankshaft or the seal bore. See how deep down the old seal is flushed into the housing bore prior to its removal to allow for a corresponding depth of the new seal. Wipe out the seal bore in the block with shop rag effectively so that no oil and dirt will be present. Apply oil to the outer periphery of the TS and place it over the crankshaft's end where the lip of the TS should be directed toward the engine. If ever possible to redo this, use seal installation tool to push the new seal back into place; otherwise such a large socket, a section of pipe or blunt tool would have to carefully hammer the new seal into the seal bore until it is flush with the rear cover. Last but not the least, the driveplate should be fitted, and then the transmission could be put into the car.

Genuine 2005 Chevrolet Trailblazer Crankshaft Seal

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

3 Crankshaft Seals found

View related parts
2005 Chevrolet Trailblazer Oil Seal
Part Number: 89017622
$17.95 MSRP: $29.69
You Save: $11.74 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Kit, Engine Rear Main Bearing
- Position: Front
- Item Weight: 0.40 Pounds
- Item Dimensions: 6.1 x 6.3 x 0.5 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89017622
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2005 Chevrolet Trailblazer Submodels:
- 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
View related parts
2005 Chevrolet Trailblazer Main Seal
Part Number: 89060436
$26.58 MSRP: $44.00
You Save: $17.42 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Kit, Crankshaft Rear Oil; Crankshaft Seal, Rear Main Seal
- Position: Rear
- Replaces: 12550574, 12585671, 89018162
- Item Weight: 0.50 Pounds
- Item Dimensions: 5.1 x 5.3 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89060436
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2005 Chevrolet Trailblazer Submodels:
- 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
2005 Chevrolet Trailblazer Seal, Crankshaft Rear Oil
Part Number: 12581717
Product Specifications
- Other Name: SEAL, Engine Rear Main Bearing; Rear Main Seal
- Position: Rear
- Replaces: 24577096
- Item Weight: 0.50 Pounds
- Item Dimensions: 5.7 x 5.8 x 1.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12581717
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2005 Chevrolet Trailblazer Submodels:
- 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L

2005 Chevrolet Trailblazer Crankshaft Seal

We are your prime source for competitively priced and high-quality OEM 2005 Chevrolet Trailblazer Crankshaft Seal. We provide you with parts that will allow you to save a lot of money without sacrificing quality. All our OEM parts are backed by the manufacturer's warranty and shipped out at a swift rate.

2005 Chevrolet Trailblazer Crankshaft Seal Parts Questions & Experts Answers

Q:
How to replace the rear crankshaft seal in V8 engine on 2005 Chevrolet Trailblazer?
Posted by Thoams D.
A:
Remove the transmission. Remove the driveplate. Pop the Crankshaft Seal off the rear cover by using a screwdriver; one should be very careful not to mar the crankshaft or the seal bore. See how deep down the old seal is flushed into the housing bore prior to its removal to allow for a corresponding depth of the new seal. Wipe out the seal bore in the block with shop rag effectively so that no oil and dirt will be present. Apply oil to the outer periphery of the TS and place it over the crankshaft's end where the lip of the TS should be directed toward the engine. If ever possible to redo this, use seal installation tool to push the new seal back into place; otherwise such a large socket, a section of pipe or blunt tool would have to carefully hammer the new seal into the seal bore until it is flush with the rear cover. Last but not the least, the driveplate should be fitted, and then the transmission could be put into the car.
Answered by GM Parts Specialist Fernando / Dec 20, 2025