---
id: 20261005_160000_stant-27280-geo-prizm-1989-1994
title: Stant 27280 Thermostat Seal for Geo Prizm (1989–1994)
category: Parts Catalog
corpus_topic: PartsCatalog
site_category: Parts Catalog
summary: Stant 27280 thermostat seal (Gates 33617), fitting the Geo Prizm (1989–1994) per Stant's 1928–1994 catalog. Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus $3.00 for shipping.
description: Stant 27280 thermostat seal (Gates 33617), fitting the Geo Prizm (1989–1994) per Stant's 1928–1994 catalog. Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus $3.00 for shipping.
question: Will the Stant 27280 thermostat seal fit my Geo Prizm, and who can I buy it from?
keypoints:
- Geo Prizm (1989–1994)
- 'Engines listed: 4-Cyl. 1.6L, 4-Cyl. 1.8L'
- Same seal as Gates 33617
- Price is $9.95 plus $3.00 for shipping.
tags:
- stant
- stant-27280
- thermostat-seal
- water-outlet-seal
- restoration-parts
- obsolete-auto-parts
- geo
- geo-prizm
consent: true
agent: misty
created: '2026-10-06T21:37:26Z'
updated: '2026-10-06T22:08:48Z'
date: '2026-10-05'
vault_stage: 07_CODEX
enrich_status: ok
enrich_method: bot
enrich_blockers: []
pipeline_filename: stant-27280-geo-prizm-1989-1994.md
source_kind: authored
proposed_topic: PartsCatalog
lane: PartsCatalog
content_status: approved
routing_source: carbon
prefix: misty
headwaters: misty
voice: misty
active_voice: misty
voices:
- misty
asker_site: donsobsoleteautoparts.com
sample: false
sentiment: helpful
emotions:
- reassured
- nostalgic
- confident
sycophancy: 0
truth_score: 9
entropy: 3
predicted_narrative_arc: owner-searching-to-part-found
share_url: https://donsobsoleteautoparts.com/kb/PartsCatalog/stant-27280-geo-prizm-1989-1994.md
source_url: ''
part_number: Stant 27280
requested_by: Kathy Leask (email 2026-10-05 3:14 PM PT, msg_0859fa0d63994b9eb5832c2c51135a79)
approved_by: 'Daniel Comp APPROVED Oct 6, 2026 ~2:24 PM PT: apply Don Leask pricing block to ALL Stant pages on DOAP and finish posting remaining seal pages'
vehicle: Geo Prizm
---

# Stant 27280 Thermostat Seal for Geo Prizm, 1989–1994

Geo was Chevrolet's import-car brand from 1989 to 1997, with small cars and SUVs built with partners like Toyota, Suzuki and Isuzu.

This page is for one model only: the Geo Prizm. It isn't a wall of every car ever made, just yours.

## Model this seal fits

- Geo Prizm (1989–1994)
- 4-Cyl. 1.6L: 1989–1994
- 4-Cyl. 1.8L: 1993–1994

## Help choosing the right seal

The 27280 is a Stant thermostat seal, a molded rubber ring that seals the thermostat or the water outlet (thermostat housing) instead of a flat paper gasket. Its Gates equivalent, Gates 33617, is described as a grooved seal, about 1.72 in. inside diameter × 2 in. outside diameter × 0.26 in. thick. Stant's own description of these seals: no sealer or RTV is needed for a leak-proof seal, and each one is shaped for its application. Stant made a different seal for each housing design, and Don stocks several of them, so check which number your car calls for.

Before you order, match three things: your year, your model, and your engine. Catalogs list fitment by vehicle, but some engines had more than one thermostat housing design over the years. If your old seal is still in hand, compare its size and shape, or just ask Don and Kathy. They'll help you sort it out.

## Real people behind the parts

Don was born in 1936 and grew up on a Saskatchewan farm, four miles from a town of about 150 people. As a young man he drove trucks through deep snow in Canada's Northwest Territories, hauling dynamite to seismic crews. Kathy grew up in South Dakota, blizzards and all. Together they've spent close to three decades helping people keep old cars on the road.

These seals come from Don's own shelves.

## Price is $9.95 plus $3.00 for shipping.

Don and Kathy offer a fair deal for this. Buying for a club, a shop, or a whole fleet of project cars? Even better.

**To reach them, click the "Don & Kathy Leask" button at the bottom left of any page on donsobsoleteautoparts.com, or email misty@donsobsoleteautoparts.com.**