Wheel Spacer for GMC Sierra: Silicone
This wheel spacer 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 lead time that slipped twice before bulk started, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Wheel Spacer |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Silicone |
| Typical use | Wet Weather Riding |
| MOQ | 1,000 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | ECE R90 |
| Packing | 50 pieces per inner box, 500 per carton |
Material options
- PVC Coated Fabric — specified where the part sits close to a heat source
- Brass — preferred when weight matters more than rigidity
- Tempered Glass — preferred when weight matters more than rigidity
- Silicone — used when the finish has to hold a coating
- Forged Aluminium — chosen where wear resistance comes first

Processes available
- cold forging
- precision stamping
- heat treatment
- powder coating
- shot blasting
- CNC machining
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 wet weather riding. Related applications include roadside assistance, farm use, construction sites, delivery fleets, daily commuting.
Quality and packing
- In-line inspection with AQL 1.5 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
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ECE R90-compliant build instead of a fresh interpretation.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 1000 pieces per line.
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.
What testing is included?
Standard lots ship with dimensional and hardness reports. ECE R90 documentation is issued with the shipment when your market requires it.
Ask for the current catalogue and the specification sheet for this line.







