P050D has a source-scoped interpretation in a manufacturer document. Check the raw form, vehicle conditions and original bulletin before using it.
This meaning belongs to the cited manufacturer document and its conditions. It is not a universal code definition, a VIN-specific match, a driving clearance or a parts diagnosis. Independent safety review remains pending.
This General Motors document supports only its stated code and vehicle context. The code alone cannot identify a failed part, prove that another make uses the same definition, or clear a car for driving. Compare your full scan with the current exact-vehicle service information.
Read the General Motors original: V8 cold misfire: coolant-entry verification Source date: 2024-03; research checked: 2026-11-01.
What the manufacturer document says
The same root can have a different meaning or role in another module or vehicle. Preserve the full raw code and suffix rather than applying this table to every car.
| Raw form | Meaning in source | Document | Case context |
|---|---|---|---|
| P050D | Cold-start rough-idle detection in this diagnostic context | General Motors 20-NA-166 | GM V8 cold P050D/P0300: diagnose before opening the engine |
Vehicle scope recorded in the source
- Cadillac CTS · 2016, 2017, 2018, 2019 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Cadillac Escalade · 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Camaro · 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Corvette · 2016, 2017, 2018, 2019 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado · 2014, 2015, 2016, 2017, 2018 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado 1500 · 2019 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado 1500 LTD · 2022 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado 1500 New · 2022 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado LD · 2019 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Silverado 1500 · 2020, 2021, 2023, 2024 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Suburban · 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
- Chevrolet Tahoe · 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 · RPO scope grouped by source: L82,L83,L86,L84,L87,LT1,LT4,LT5; verify actual vehicle engine; gasoline
What to record before clearing the code
- Cold versus warm symptom pattern
- Coolant-level trend
- Prior injector flow-class/part records
- Note other codes and the exact dashboard message; a generic reader may miss the affected module.
Questions before a repair or part order
- Do not mix injector flow classes on the RPOs identified by GM or dismantle the engine before the diagnostic tree.
- Does the current manufacturer document cover this VIN, engine, build date and symptom?
- Is a recall, warranty or newer service communication relevant? A bulletin alone is not free-repair eligibility.
How to use this research note
The source document is historical and may have a later revision. Its cited vehicle table is a condition to verify, not a complete list of affected VINs. A code can be secondary to another fault. If braking, steering, propulsion, temperature, smoke, fuel or high-voltage behavior is unsafe, stop safely and seek qualified help rather than using this page to continue driving.
Sources and scope
- General Motors — V8 cold misfire: coolant-entry verification (20-NA-166) Document: 2024-03 · 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.