---
id: 20261004_190000_stant-27103-gmc-s15-1984-1985
title: Stant 27103 Thermostat Gasket for GMC S15 (1984–1985)
category: Parts Catalog
corpus_topic: PartsCatalog
site_category: Parts Catalog
summary: Stant 27103 universal thermostat gasket, fitting the GMC S15 (1984–1985). Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus shipping.
description: Stant 27103 universal thermostat gasket, fitting the GMC S15 (1984–1985). Offered by Don and Kathy Leask of Don's Obsolete Auto Parts, restoration parts sellers online since 1997. Price is $9.95 plus shipping.
question: Will the Stant 27103 thermostat gasket fit my GMC S15, and who can I buy it from?
keypoints:
- GMC S15 (1984–1985)
- 'Engines listed: 4 Cyl 2.2L'
tags:
- stant
- stant-27103
- thermostat-gasket
- universal-gasket
- restoration-parts
- obsolete-auto-parts
- gmc
- gmc-s15
consent: true
agent: misty
created: '2026-10-05T02:38:49Z'
updated: '2026-10-05T02:38:49Z'
date: '2026-10-04'
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enrich_status: ok
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pipeline_filename: stant-27103-gmc-s15-1984-1985.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
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predicted_narrative_arc: owner-searching-to-part-found
share_url: https://donsobsoleteautoparts.com/kb/PartsCatalog/stant-27103-gmc-s15-1984-1985.md
source_url: ''
part_number: Stant 27103
approved_by: Daniel Comp (chat, 2026-10-04 ~7:00 PM PT)
vehicle: GMC S15
---

# Stant 27103 Thermostat Gasket for GMC S15, 1984–1985

GMC trucks were the professional-grade cousins of Chevrolet trucks, built side by side and often sharing the same engines and cooling parts. On the GMC side, the catalogs list the Stant 27103 for 3 models from 1984 to 1995.

This page is for one model only: the GMC S15. It isn't a wall of every car ever made, just yours.

## Model this gasket fits

- GMC S15 (1984–1985)
- Engines listed in the catalog: 4 Cyl 2.2L

## Help choosing the right gasket

The 27103 is a 3.25 by 3.5 inch thermostat gasket blank from Stant, the kind a mechanic reaches for when the original cut gasket for an older or less common housing is hard to find. Lay your thermostat housing on it, check that the opening and bolt holes line up with your engine's outlet, and trim to fit if needed. Stant cut a different gasket 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 gasket is still in hand, compare its shape and bolt holes, 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 gaskets come from Don's own shelves, in original Stant packaging.

## Price is $9.95 plus 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.**