Brake booster, 260 mm, tandem, high flow

Years 1998–04 Models 2 Factory citations 11

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Also documented for Chevrolet Oldsmobile

Documented applications

Jimmy — second generation (1995–2001)

1998–2001 Factory-verified

2001 list reads 240 mm

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Sonoma — second generation (1994–2004)

1998–2004 Factory-verified

2001 list reads 240 mm. The 2002–2004 lists read as the 2001 list.

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2003 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2004 gmc sonoma pickup 4wd rpo code list, p.1.

This page aggregates every documented appearance of JM3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.