GMC Warning Lights and Trouble Code Guide

Browse the GMC models currently backed by a manufacturer or official document in this research set.

Source check and limits

This source supports a model name or the specific conditions shown below. A complete US year, engine, warning and parts list is not established here. Match your VIN and exact-year owner manual before using a code or case.

Read the General Motors original: L5P emissions DTCs and exhaust-leak diagnosis Source date: 2024-08; research checked: 2026-11-01.

Document-scoped model names

These models appear in manufacturer communications with conditions that need exact VIN, year and equipment confirmation. No complete selectable model-year catalog has been established for this make.

Model pages with manufacturer-document context

These model names have a conditional source row and a case-specific guide. They are not year-complete owner manuals or proof that any individual vehicle has a fault.

Sierra2 source-scoped case link(s)Acadia5 source-scoped case link(s)Terrain3 source-scoped case link(s)Sierra 15004 source-scoped case link(s)Canyon1 source-scoped case link(s)Sierra 1500 New2 source-scoped case link(s)Sierra 1500 Limited2 source-scoped case link(s)Sierra Limited1 source-scoped case link(s)HUMMER EV1 source-scoped case link(s)HUMMER EV SUV1 source-scoped case link(s)

Make-specific warning terms

The plan flags these as terms to check in an exact GMC manual: StabiliTrak, 4WD, towing, diesel, air ride, EV charging. Their presence here does not mean every model has these features or faults.

Research coverage for this make

The current catalog has 10 GMC model-name records, 0 manual/profile-backed model pages, 10 additional document-scoped model pages and 0 detailed configuration records. The documented model-year values from complete profiles are not yet established. These counts describe the research files, not the entire US fleet, an owner survey or confirmed fault frequency.

Missing model years remain unknown in this site rather than being treated as vehicles that never existed.

Before matching a code or part

Model family names do not prove a specific model year, powertrain, equipment package or repair. Match the VIN, owner's manual and complete scan first.

Sources and scope

General Motors — L5P emissions DTCs and exhaust-leak diagnosis (23-NA-061) Document: 2024-08 · Research checked: 2026-11-01
General Motors — 8T65/9T-series no/slipping drive, P0746/P0747 and clutch retaining ring (PIP5974C) Document: 2024-07-11 · Research checked: 2026-11-01
General Motors — LM2 turbocharger actuator fasteners and loss of power (22-NA-021) Document: 2022-02 · Research checked: 2026-11-01
General Motors — LSD turbo/charge-air duct faults and code-combination branches (PIP5927D) Document: 2026-02-26 · Research checked: 2026-11-01
General Motors — LM2 MIL with P06DD/P2B60/P26BB/P1098; ECM calibration branch (22-NA-082) Document: 2022-07 · Research checked: 2026-11-01
General Motors — Colorado/Canyon EBCM connector water intrusion (PIT5499A) Document: date not recorded · Research checked: 2026-11-01
General Motors — Battery-monitor/LIN DTCs with stop/start inoperative (15-NA-087) Document: 2022-10 · Research checked: 2026-11-01
General Motors — Intermittent Shift to Park (19-NA-206) Document: 2019-09 · Research checked: 2026-11-01
General Motors — V8 cold misfire: coolant-entry verification (20-NA-166) Document: 2024-03 · Research checked: 2026-11-01
General Motors — LK0 P050D fuel injectors and PCM update (24-NA-244) Document: 2025-03 · Research checked: 2026-11-01
General Motors — P059F and bent front support bracket (PIT6218B) Document: 2025-03-31 · Research checked: 2026-11-01
General Motors — EV battery isolation and coolant-loss data collection (23-NA-151) Document: date not recorded · Research checked: 2026-11-01

Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.