Engine Code

GM LGY engine (YYYY-YYYY) – Specs, Problems & Compatibility Database

The GM LGY is a X,XXX cc, [layout] [engine type] petrol engine produced between YYYY and YYYY. It features [technologies] delivering [outputs]. [Technical term] enables [real-world benefit].

Fitted to [models], the LGY was engineered for [driving character]. Emissions compliance was achieved through [technologies], allowing [Euro standard] compliance.

One documented concern is [issue], highlighted in [Document ID]. [Cause description]. [Transition/update details].

BMW N47D20A Engine
Compliance Note:

Production years YYYY–YYYY meet Euro X standards; YYYY–YYYY models may have Euro Y compliance depending on market (VCA UK Type Approval #...).

LGY Technical Specifications

The GM LGY is a XXXX cc [CONFIGURATION] engineered for [VEHICLE_TYPE] (YYYY-YYYY). It combines [TECHNOLOGY_1] with [TECHNOLOGY_2] to deliver [DRIVING_CHARACTERISTICS]. Designed to meet [EMISSIONS_STANDARD], it balances everyday performance with economy.

ParameterValueSource
DisplacementXXXX cc
Fuel typePetrol
Configuration[e.g., Inline-4, DOHC, 16-valve]
Aspiration[e.g., Naturally Aspirated, Turbocharged]
Bore × strokeXX.X mm × XX.X mm
Power outputXXX–XXX kW (XXX–XXX PS)
TorqueXXX–XXX Nm @ XXXX–XXXX rpm
Fuel system[e.g., Direct Injection]
Emissions standardEuro X
Compression ratioX.X:1
Cooling systemWater-cooled
Turbocharger[Details if applicable]
Timing system[e.g., Chain, Belt]
Oil type[e.g., Dexos1 Gen 3 5W-30]
Dry weightXXX kg
Practical Implications

[DRIVING_CHARACTERISTICS] but requires [MAINTENANCE_REQUIREMENT] to prevent [ISSUE]. [SPECIAL_OIL] is critical due to [REASON]. [OPERATIONAL_ADVICE]. [UPGRADE_REFERENCE].

Data Verification Notes

Oil Specs: Requires [SPECIFICATION] ([OEM DOCUMENT]). [Additional technical details].

Emissions: Euro X certification applies to [years/models] only ([AUTHORITY REF]). [Additional market-specific details].

Power Ratings: Measured under [STANDARD]. [HIGHER_OUTPUT] requires [FUEL_QUALITY] ([OEM DOCUMENT]).

Primary Sources

[Primary Source 1]

[Primary Source 2]

[Primary Source 3]

LGY Compatible Models

The GM LGY was used across GM's [PLATFORMS] platforms with [MOUNTING_TYPE] mounting and [LICENSED_STATUS]. This engine received platform-specific adaptations-[ADAPTATION_DETAILS]-and from [YEAR] the [FACELIFT_DETAILS], creating interchange limits. [PARTNERSHIP_DETAILS]. All adaptations are documented in OEM technical bulletins.

Make:
GM
Years:
YYYY-YYYY
Models:
[MODEL_FAMILY]
Variants:
[VARIANTS_LIST]
View Source
[OEM_SOURCE]
Identification Guidance

[IDENTIFICATION_GUIDANCE_TEXT]

[NOTE_TITLE_1]

Evidence:

[EVIDENCE_REFERENCE]

[ C U S T O M_ F I E L D_1]:

[DESCRIPTION_1]

[ C U S T O M_ F I E L D_2]:

[DESCRIPTION_2]

Common Reliability Issues - GM LGY

The LGY's primary reliability risk is [MAIN_ISSUE], with elevated incidence in [USAGE_CONDITION]. [OEM_STATISTIC], while [GOVERNMENT_DATA]. [USAGE_FACTOR] make [MITIGATION_FACTOR] critical.

[ISSUE_TITLE_1]
Symptoms: [SYMPTOMS_1]
Cause: [CAUSE_1]
Fix: [FIX_1]
[ISSUE_TITLE_2]
Symptoms: [SYMPTOMS_2]
Cause: [CAUSE_2]
Fix: [FIX_2]
[ISSUE_TITLE_3]
Symptoms: [SYMPTOMS_3]
Cause: [CAUSE_3]
Fix: [FIX_3]
[ISSUE_TITLE_4]
Symptoms: [SYMPTOMS_4]
Cause: [CAUSE_4]
Fix: [FIX_4]
Research Basis

Analysis derived from GM technical bulletins (YYYY-YYYY) and [GOVERNMENT_AGENCY] failure statistics (YYYY-YYYY). Repair procedures should follow manufacturer guidelines.

Frequently Asked Questions about GM LGY

Find answers to most commonly asked questions about GM LGY.

Research Resources

Comprehensive technical documentation and regulatory references

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Transparency in Gaps

If a data point is not officially disclosed, it is marked 'Undisclosed'.

Regulatory Stability

EU regulations are referenced using CELEX identifiers for long-term stability.

Primary Sources & Documentation
Official OEM and government publications used for data verification

Primary Sources

GM Official Site

Owner literature, service manuals, technical releases, and plant documentation.

EUR-Lex

EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).

GOV.UK: Vehicle Approval & V5C

UK vehicle approval processes, import rules, and MoT guidance.

DVLA: Engine Changes & MoT

Official guidance on engine swaps and inspection implications.

Vehicle Certification Agency (VCA)

UK type-approval authority for automotive products.

Official Documentation

Regulatory Compliance

Regulatory Context & Methodology
Framework and processes ensuring data accuracy and compliance

Regulatory Context

Regulation (EC) No 715/2007

Euro emissions framework for vehicle type approval.

Commission Regulation (EU) 2017/1151

WLTP and RDE testing procedures for emissions certification.

GOV.UK: Vehicle Approval

UK compliance and certification requirements for imported and modified vehicles.

VCA Certification Portal

Type-approval guidance and documentation.

Methodology

Data Compilation

All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.

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Last Updated: 16 August 2025

All specifications and compatibility data verified against officialGM documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .

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