- 2014 Factory-verified
17 x 7.5 steel spare; only in: 2500
PYN Factory-verified
Also described as Wheels, 17" (43.2 cm), painted steel, silver
Also documented for Chevrolet
Documented applications
- 2015, 2018 Factory-verified
17 x 7.5 steel spare; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra: S; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
- 2025–2026 Factory-verified
only in: 2500 HD; Pro: S; SLE: O; SLT, AT4, AT4X, Denali, Denali Ultimate: not offered
This page aggregates every documented appearance of PYN in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.