- 2014–2016 Factory-verified
LTZ (1LZ, 2LZ); the 2016 guide reads perforated leather-appointed; deleted for 2017 (GM's 2017 Impala RPO change list, GM Authority); front bucket seats (A51)
H1P Factory-verified
Documented applications
This page aggregates every documented appearance of H1P in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.