Package, Timberline

Years 1987–89 Models 1 Factory citations 3

Also documented for Chevrolet

Documented applications

Jimmy — first generation (1983–1994)

1987–1989 Factory-verified

requires YC2 or YC3; AA3 glass, gold painted cast aluminum wheels, exterior black-out package, D44 mirrors and VE6 bumpers; the 1988 and 1989 joint pages print it as High Country/Timberline, the Chevrolet and GMC names; the merged S-10 Blazer doc writes High Country package; shared S/T platform code; cited from the joint S-10/15 Blazer/Jimmy pages of the S-10 Blazer kit

GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.44.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.17.

This page aggregates every documented appearance of YH9 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.