Brakes, hydraulic power, 4-wheel disc, 6,400 lb

Years 2004–07 Models 2 Factory citations 4

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Also described as Hydraulic brake power, disc/disc, 6,400 lbs

Also documented for Chevrolet

Documented applications

Safari — Second generation (1995–2005)

2004, 2005 Factory-verified

GM factory document — 2004 gmc safari 2wd rpo code list, p.1.
GM factory document — 2005 gmc safari 2wd rpo code list, p.1.

Sierra — GMT800 (1999–2007)

2004–2007 Factory-verified

GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

This page aggregates every documented appearance of JH1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.