C28 ✓ Factory-verified

Oldsmobile · Regular Production Option

Pump, coolant, auxiliary

Years 2000 Models 1 Factory citations 1

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Also documented for ChevroletPontiac

Documented applications

Silhouette — U-body second generation (1997–2004) →

• 2000 ✓ Factory-verified

  the list prints "Auxillary"

  ⛭ GM factory document — 2000 oldsmobile silhouette ext rpo code list, p.1.

This page aggregates every documented appearance of C28 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.