Oil Pump for GMC Sierra: Cast Iron
This oil pump for the GMC Sierra is specified around cast iron, 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 premature wear on the first batch. Both are specification problems, and both are preventable.

Specification
| Product | Oil Pump |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Cast Iron |
| Typical use | Motocross |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | SGS |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Titanium Alloy — the cost-effective default for volume programmes
- PVC Coated Fabric — specified where the part sits close to a heat source
- Tempered Glass — the cost-effective default for volume programmes
- Neoprene — specified where the part sits close to a heat source
- Brass — preferred when weight matters more than rigidity

Processes available
- ultrasonic cleaning
- cold forging
- precision stamping
- rubber vulcanisation
- injection moulding
- shot blasting
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 motocross. Related applications include rental fleets, urban courier work, long-distance touring, track days, daily commuting.
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 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.
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.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 5 days once you have seen the first piece.
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.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







