SYT ✓ Factory-verified

GMC · Regular Production Option

LPO, Sill plates, premium

Years 2015 Models 1 Factory citations 1

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Also documented for Chevrolet

Documented applications

Sierra HD — K2XX (2015–2019) →

• 2015 ✓ Factory-verified

  dealer-installed; Sierra, SLE, SLT: O

  ⛭ GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.

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