Dayco 86504 coolant bypass hose for the 1999-2007 Chevrolet Silverado 1500 V8 4.8L or 5.3L, the 2003-2007 Silverado 1500 V8 6.0L and other vehicles carries coolant on the run from the throttle body to the engine.
When an engine coolant bypass hose cracks, swells or goes soft, it can leave damp spots, a coolant smell or a dropping coolant level (check that level only with the engine cool). A loose clamp, another coolant hose or the throttle body connection can leak the same way, so trace the source of the coolant before you buy a hose.
This coolant bypass hose is a direct-fit replacement for the 1999-2006 GMC Sierra 1500 V8 4.8L, the 1999-2007 Sierra 1500 V8 5.3L and the 2001-2006 Sierra 1500 V8 6.0L. It also fits the 2000-2006 Chevrolet Tahoe V8 4.8L or 5.3L, and each of them takes one hose.
Interchange: 14754S · 18623 · 10623
This part cross-references / interchanges with the following part numbers:
Does the Dayco 86504 coolant bypass hose fit a 2003-2007 Chevrolet Silverado 1500 V8 6.0L?
Yes. Dayco 86504 fits the 1999-2007 Chevrolet Silverado 1500 V8 4.8L or 5.3L and the 2003-2007 Silverado 1500 V8 6.0L. For a vehicle not named here, look it up on the Buyer's Guide tab.
Where does this coolant bypass hose go on the engine?
The catalog position for Dayco 86504 is throttle body to engine, so this is the hose for that run. Each vehicle takes one.
How can I tell if my coolant bypass hose is leaking?
With the engine off and cool, look for damp spots, cracks or a soft, swollen hose, and check the coolant level only when the engine is cool. A shop can pressure-test the cooling system.
Does Dayco 86504 replace 14754S?
Yes. 14754S is one of the numbers Dayco 86504 replaces, along with 18623 and 10623.
Is the Dayco 86504 hose right for the 2000-2006 Chevrolet Tahoe V8 4.8L?
Yes. Dayco 86504 fits the 2000-2006 Chevrolet Tahoe with the V8 4.8L or the V8 5.3L, and each takes one hose.
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.
