Is this tank worth it over a junkyard reservoir?

Yes, if your original tank is cracked or the level sensor has failed. A used tank is the same age as yours and may crack soon, while this one comes with a new sensor.

Does it fit trucks other than the GMC K3500?

It is listed for the 1988-2000 GMC K3500 only. Check the part number against your truck's year and engine before ordering, since other GM models use different tanks.

Is the coolant level sensor included?

Yes. The listing specifies a sending unit and level sensor as part of the part, so you should not need to buy the sensor separately.

Does it come with a cap?

No cap is listed. Reuse the pressure cap from your old tank if it still holds pressure, or buy a replacement cap separately.

How hard is the install?

It is a straightforward job: drain some coolant, unplug the sensor, unbolt the old tank, and bolt the new one in. Expect under an hour with basic hand tools.

Replacement tanks like this tend to dip during general auto parts sales and when a store runs a promotion. Compare the current price against its recent range before buying.

Dorman Coolant Reservoir G1030308683DOR

Last price we saw

$22.13at Partsgeek.com, last seen Nov 1

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Our take on the Dorman Coolant Reservoir G1030308683DOR

The Dorman G1030308683DOR is a replacement coolant expansion tank for 1988-2000 GMC K3500 trucks, and it ships with a coolant level sensor (sending unit) already included. That bundled sensor is the main thing that sets it apart from a bare plastic tank, since the original sensor often fails or breaks during removal. It is a stock-style replacement, not an upgrade, aimed at owners fixing a cracked or leaking factory reservoir.

Best for1988-2000 GMC K3500 owners with a cracked or seeping factory tankDIYers replacing a failed coolant level sensor at the same time