Wiring Harness for GMC Sierra: Magnesium Alloy
This wiring harness for the GMC Sierra is specified around magnesium alloy, 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 reorders that did not match the approved sample, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.

Specification
| Product | Wiring Harness |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Magnesium Alloy |
| Typical use | Passenger Transport |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 25-40 days after approval |
| Compliance | SGS |
| Packing | 20 pieces per inner box, 500 per carton |
Material options
- Sintered Metal — selected when the part is exposed to weather and road salt
- High Density Foam — used when the finish has to hold a coating
- PVC Coated Fabric — selected when the part is exposed to weather and road salt
- Bronze — specified where the part sits close to a heat source
- Titanium Alloy — selected when the part is exposed to weather and road salt

Processes available
- rubber vulcanisation
- electroplating
- gravity casting
- robot welding
- precision stamping
- cold forging
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 passenger transport. Related applications include rental fleets, daily commuting, farm use, construction sites, mountain roads.
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 200 pieces per line.
What testing is included?
Standard lots ship with dimensional and hardness reports. SGS documentation is issued with the shipment when your market requires it.
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 is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







