Oxygen Sensor Unit for GMC Sierra: Semi-Metallic Compound
This oxygen sensor unit for the GMC Sierra is specified around semi-metallic compound, 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 specification nobody had written down, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.

Specification
| Product | Oxygen Sensor Unit |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Semi-Metallic Compound |
| Typical use | Construction Sites |
| MOQ | 500 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 15-40 days after approval |
| Compliance | E-mark |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Powder Coated Steel — specified where the part sits close to a heat source
- Titanium Alloy — preferred when weight matters more than rigidity
- Zinc Plated Steel — used when the finish has to hold a coating
- Anodised Aluminium — used when the finish has to hold a coating
- Kevlar Composite — selected when the part is exposed to weather and road salt

Processes available
- assembly line testing
- cold forging
- injection moulding
- powder coating
- shot blasting
- precision stamping
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 construction sites. Related applications include off-road trails, rural transport, ride-hailing fleets, long-distance touring, passenger transport.
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
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the E-mark-compliant build instead of a fresh interpretation.
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 7 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 500 pieces per line.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







