Purge Valve for GMC Sierra: Carbon Fibre Composite
This purge valve for the GMC Sierra is specified around carbon fibre composite, 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 a fitment that looked right on paper and failed on the bench. Both are specification problems, and both are preventable.

Specification
| Product | Purge Valve |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Carbon Fibre Composite |
| Typical use | Farm Use |
| MOQ | 1,000 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 20-55 days after approval |
| Compliance | ISO/TS 16949 |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- Polypropylene — used when the finish has to hold a coating
- Chromed Steel — preferred when weight matters more than rigidity
- Magnesium Alloy — preferred when weight matters more than rigidity
- Aluminium Alloy — used when the finish has to hold a coating
- ABS Plastic — specified where the part sits close to a heat source

Processes available
- CNC machining
- powder coating
- sintering
- ultrasonic cleaning
- cold forging
- surface grinding
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 farm use. Related applications include security patrols, ride-hailing fleets, delivery fleets, rural transport, adventure travel.
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 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.
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 is the minimum order quantity?
The standard MOQ is 1000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.







