Gearbox Solenoid for GMC Sierra: Cast Iron
This gearbox solenoid 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 documentation that arrived after the container shipped, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.

Specification
| Product | Gearbox Solenoid |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Cast Iron |
| Typical use | Delivery Fleets |
| MOQ | 500 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 20-40 days after approval |
| Compliance | REACH |
| Packing | 100 pieces per inner box, 500 per carton |
Material options
- PU Leather — chosen where wear resistance comes first
- Natural Rubber — chosen where wear resistance comes first
- Carbon Steel — chosen where wear resistance comes first
- Magnesium Alloy — chosen where wear resistance comes first
- Aluminium Alloy — specified where the part sits close to a heat source

Processes available
- sintering
- rubber vulcanisation
- heat treatment
- die casting
- surface grinding
- cold forging
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for delivery fleets. Related applications include mining sites, motocross, daily commuting, night riding, off-road trails.
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
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 500 pieces per line.
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.
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.
What is the minimum order quantity?
The standard MOQ is 500 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Send the specification you are working to and we will confirm what we can match, what we would change and why.







