AC Delco LS Gen 3 187 Degree Thermostat w/ Housing 1997-2003 4.8L 5.3L 6.0L LS1

AC Delco LS Gen 3 187 Degree Thermostat w/ Housing 1997-2003 4.8L 5.3L 6.0L LS1

Marsoni

M251S

$43.95

Get it in 3 business days with 1 day shipping. Friday, May 29

AC Delco LS Gen 3 187 Degree Thermostat w/ Housing 1997-2003 4.8L 5.3L 6.0L LS1LS Gen 3 Thermostat and Housing (attached thermostat style) Genuine AC Delco OEM replacement part Compatible with 1999 to 2006 Gen 3 Silverado, Camaro, and Corvette water pumps (Will not fit Gen 4 truck "large" bolt pattern straight neck, or LS3 water pumps) Includes: thermostat housing, OE temperature thermostat and seal

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I had to do some work on my Honda that required me to remove the steering pump. Any time you do that, you should replace the top o-ring. This o-ring was an exact match to the original and fit just fine. I popped it in and torqued it down to spec. It's holding a great seal and I've seen no problems with it. Good replacement in that it functions just like it should!

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Reviewed in the United States on June 23, 2025

Verified Purchase

Clemente

Port Orchard, US

★★★★★ 3

Tuve que poner otra

Nose si eran las medidas correctas se loqueó el aceite

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Reviewed in the United States on January 4, 2026

T H

West Palm Beach, US

★★★★★ 5

Good fit, well made

These O-rings fit dimensionally the power steering pump on the 2006 CR-V. I only checked on the replacement pump, did not install yet on the car. These look and feel just like the originals, good quality material and well made, but only mileage can tell if they are as good. For now, all looks good.

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Reviewed in the United States on July 10, 2025

Fort Morgan, US

★★★★★ 5

as described

The size of these two o rings matches the description. Did not use in a vehicle so cannot speak on the fit of that, but size was accurate and they worked for my use.

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Reviewed in the United States on June 3, 2025

Verified Purchase

nate

Charlottesville, US

★★★★★ 5

Nice item

So far so good my power steering is not leaking anymore.

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Reviewed in the United States on October 3, 2025