Window Switch for GMC Sierra: EPDM Rubber
This window switch 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 specification nobody had written down, or a specification nobody had written down. Both are specification problems, and both are preventable.

Specification
| Product | Window Switch |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | EPDM Rubber |
| Typical use | Construction Sites |
| MOQ | 500 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | ISO 9001 |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Cast Iron — the cost-effective default for volume programmes
- PU Leather — selected when the part is exposed to weather and road salt
- Neoprene — chosen where wear resistance comes first
- Brass — specified where the part sits close to a heat source
- Forged Aluminium — specified where the part sits close to a heat source

Processes available
- heat treatment
- CNC machining
- anodising
- injection moulding
- robot welding
- precision stamping
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for construction sites. Related applications include airport ground fleets, mining sites, daily commuting, night riding, roadside assistance.
Quality and packing
- In-line inspection with AQL 1.5 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
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 3 days once you have seen the first piece.
How is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
What testing is included?
Standard lots ship with dimensional and hardness reports. ISO 9001 documentation is issued with the shipment when your market requires it.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ISO 9001-compliant build instead of a fresh interpretation.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.







