Timken Engine Crankshaft Seal P/N:100470
National 100470 front crankshaft seal for the 1999-2019 Chevrolet Silverado 1500 4.3L / 4.8L / 5.3L / 6.0L / 6.2L and other vehicles keeps engine oil from leaking out where the crankshaft turns at the front of the engine.
A worn engine crankshaft seal can show up as oil seeping around the front of the engine or an oil level that keeps dropping. Before you replace the seal, rule out other leak sources such as the oil pan gasket or valve cover gaskets, because oil from higher up can run down and end up near the crankshaft.
This seal is a direct-fit replacement for the 1999-2019 GMC Sierra 1500 4.3L / 4.8L / 5.3L / 6.0L / 6.2L and the 2000-2013 Chevrolet Tahoe 5.3L, and each takes one. Many other trucks, SUVs and cars also fit it, so look up your own year and engine in the "Vehicles it fits" section.
Interchange: 296-02
21605
This part cross-references / interchanges with the following part numbers:
Does the National 100470 crankshaft seal fit the 1999-2019 GMC Sierra 1500 4.3L / 4.8L / 5.3L / 6.0L / 6.2L?
Yes. National 100470 is a front crankshaft seal that fits the 1999-2019 GMC Sierra 1500 4.3L / 4.8L / 5.3L / 6.0L / 6.2L and the 1999-2019 Chevrolet Silverado 1500 4.3L / 4.8L / 5.3L / 6.0L / 6.2L.
Will this seal fit a 2000-2013 Chevrolet Tahoe 5.3L?
Yes. The 2000-2013 Chevrolet Tahoe 5.3L is in this seal's fitment, and it takes one seal.
Is the National 100470 a front or rear crankshaft seal?
It is a front crankshaft seal. National 100470 is listed for the front position, and each application takes one.
How can I tell if my crankshaft seal is leaking?
With the engine off and cool, look for oil seepage or a wet, oily film around the front of the engine. An oil level that drops between checks can also point to a leaking seal.
Does National 100470 replace 296-02 or 21605?
Yes. 296-02 and 21605 are listed as interchange numbers for this crankshaft seal, so both cross to National 100470.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are 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.