Gasket Set for GMC Sierra: EPDM Rubber
This gasket set for the GMC Sierra is specified around epdm rubber, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is a fitment that looked right on paper and failed on the bench, or premature wear on the first batch. Both are specification problems, and both are preventable.

Specification
| Product | Gasket Set |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | EPDM Rubber |
| Typical use | Delivery Fleets |
| MOQ | 500 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | E-mark |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- Tempered Glass — used when the finish has to hold a coating
- Anodised Aluminium — specified where the part sits close to a heat source
- Zinc Plated Steel — the cost-effective default for volume programmes
- PU Leather — preferred when weight matters more than rigidity
- Polypropylene — preferred when weight matters more than rigidity

Processes available
- anodising
- gravity casting
- rubber vulcanisation
- ultrasonic cleaning
- heat treatment
- shot blasting
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for delivery fleets. Related applications include mining sites, wet weather riding, roadside assistance, adventure travel, delivery fleets.
Quality and packing
- In-line inspection with AQL 4.0 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
What testing is included?
Standard lots ship with dimensional and hardness reports. E-mark documentation is issued with the shipment when your market requires it.
What is the minimum order quantity?
The standard MOQ is 500 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 500 pieces per line.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







