Radiator Cap for GMC Sierra: Silicone
This radiator cap for the GMC Sierra is specified around silicone, 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 inconsistent hardness between lots, or inconsistent hardness between lots. Both are specification problems, and both are preventable.

Specification
| Product | Radiator Cap |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Silicone |
| Typical use | Motocross |
| MOQ | 1,000 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | DOT |
| Packing | 100 pieces per inner box, 1000 per carton |
Material options
- ABS Plastic — chosen where wear resistance comes first
- Chromed Steel — specified where the part sits close to a heat source
- Aluminium Alloy — used when the finish has to hold a coating
- Kevlar Composite — chosen where wear resistance comes first
- Carbon Fibre Composite — the cost-effective default for volume programmes

Processes available
- surface grinding
- heat treatment
- laser cutting
- assembly line testing
- sintering
- CNC machining
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 motocross. Related applications include motocross, construction sites, night riding, roadside assistance, farm use.
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
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.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 1000 pieces per line.
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. DOT documentation is issued with the shipment when your market requires it.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.







