Window Regulator for GMC Sierra: Natural Rubber
This window regulator for the GMC Sierra is specified around natural 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 supplier who changed material without saying so, or a specification nobody had written down. Both are specification problems, and both are preventable.

Specification
| Product | Window Regulator |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Natural Rubber |
| Typical use | Security Patrols |
| MOQ | 200 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | ISO/TS 16949 |
| Packing | 50 pieces per inner box, 500 per carton |
Material options
- Forged Aluminium — the cost-effective default for volume programmes
- Silicone — used when the finish has to hold a coating
- Aluminium Alloy — chosen where wear resistance comes first
- Anodised Aluminium — preferred when weight matters more than rigidity
- Sintered Metal — used when the finish has to hold a coating

Processes available
- ultrasonic cleaning
- anodising
- robot welding
- assembly line testing
- gravity casting
- cold forging
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for security patrols. Related applications include long-distance touring, rural transport, farm use, track days, passenger transport.
Quality and packing
- In-line inspection with AQL 2.5 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
What testing is included?
Standard lots ship with dimensional and hardness reports. ISO/TS 16949 documentation is issued with the shipment when your market requires it.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 5 days once you have seen the first piece.
What is the minimum order quantity?
The standard MOQ is 200 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







