1M1 ✓ Factory-verified

Chevrolet · Regular Production Option

Marking, U.S. Army, reflective white

Years 1999–00 Models 3 Factory citations 4

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Also documented for CadillacGMC

Documented applications

C/K pickup — GMT400 (1988–2000) →

• 1999, 2000 ✓ Factory-verified
  ⛭ GM factory document — 1999 chevrolet chevy c pickup 2wd rpo code list, p.1.

  ⛭ GM factory document — 2000 chevrolet chevy c pickup 2wd rpo code list, p.1.

Suburban — GMT400 (1992–1999) →

• 1999 ✓ Factory-verified
  ⛭ GM factory document — 1999 chevrolet chevy suburban 2wd rpo code list, p.1.

Tahoe — GMT400 (1995–1999) →

• 1999 ✓ Factory-verified
  ⛭ GM factory document — 1999 chevrolet tahoe 2wd rpo code list, p.1.

This page aggregates every documented appearance of 1M1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.