MANUFACTURER DOCUMENTATION

Chevrolet Colorado

Paired lean-code calibration evidence.

Documented years: 2020–2021

Match the document’s model, years, engine, market and other conditions. This page does not establish every code the vehicle can display.

Diagnostic guides

Manufacturer bulletins

Paired lean codes and calibration

Read the full diagnostic guide.

Scope: 2020–2021; production through May 1, 2021 · LGZ

Displays in the document: P0171, P0174

See the documented decision branches.

Vehicle-specific scope applies.

Read the diagnostic case guide

Sources and scope

  1. 21-NA-105

    General Motors · Checked 2026-10-30

  2. 2021 Colorado owner manual — warning lamps and emissions readiness

    General Motors · Checked 2026-10-30

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