The Chevrolet LMT is a 2,694 cc, inline-five turbocharged petrol engine produced between 2022 and 2024. It belongs to General Motors' Gen 4 performance engine family, engineered for longitudinal RWD platforms. Featuring direct fuel injection, dual overhead camshafts (DOHC), and continuously variable valve timing (CVVT), it delivers 207 kW (282 PS) at 5,600 rpm and 400 Nm of torque from 2,000–4,000 rpm, enabling strong mid-range performance.
Fitted to the Chevrolet Colorado ZR2 (2022–2024) and Chevrolet Blazer SS (2023–2024), the LMT engine was designed for North American and Australian markets requiring high torque output in mid-size trucks and performance SUVs. It meets EPA Tier 3 Bin 30 and ADR 79/03 emissions standards through a close-coupled three-way catalyst, cooled EGR, and advanced engine control calibration. The cylinder head features integrated exhaust manifolds for rapid light-off.
One documented reliability concern is premature wear of the balance shaft drive gear, identified in GM Service Information Bulletin 23-NA-011. This issue is linked to inadequate lubrication film strength under sustained off-road load cycles. From 2023, GM revised the gear material and updated oil specification to GM dexos1 Gen 3 (0W-20) to improve durability.
Chevrolet
Production years 2022–2023 meet EPA Tier 3 Bin 30 (US EPA Certificate #US22-0032); 2024 models comply with updated California LEV III SULEV30 standards.
The Chevrolet LMT is a 2,694 cc inline-five turbocharged petrol engine developed for longitudinal RWD applications (2022–2024). It combines direct injection with dual overhead camshafts and cooled exhaust gas recirculation to deliver strong low-end torque. Designed for North American and Australasian markets, it balances trail performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,694 cc | |
| Fuel type | Petrol (Unleaded, 87 RON min) | |
| Configuration | Inline-5, DOHC, 20-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 99.5 mm | |
| Power output | 207 kW (282 PS) @ 5,600 rpm | |
| Torque | 400 Nm @ 2,000–4,000 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | EPA Tier 3 Bin 30 (2022–2023); LEV III SULEV30 (2024) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Honeywell HGK28 turbo (fixed geometry, water-cooled) | |
| Timing system | Dual-chain (primary and secondary) | |
| Oil type | GM dexos1 Gen 3 (SAE 0W-20) | |
| Dry weight | 182 kg |
The LMT's low-end torque delivery enables strong off-road performance but demands strict adherence to 15,000 km oil change intervals using GM dexos1 Gen 3 (0W-20) to prevent balance shaft gear wear. The integrated exhaust manifold improves warm-up efficiency but increases cylinder head thermal load; coolant quality and level must be maintained. Extended low-speed off-road use increases risk of gear wear; periodic highway driving helps maintain oil pressure stability. Post-2023 models feature revised gear material; pre-2023 units should verify oil flow to balance shaft per GM SIB 23-NA-011. Direct injection necessitates periodic intake valve cleaning to mitigate carbon buildup.
Oil Specs: Requires GM dexos1 Gen 3 (0W-20) specification (GM SIB 23-NA-011). Supersedes API SP and ILSAC GF-6 standards.
Emissions: EPA Tier 3 Bin 30 applies to 2022–2023 models (US EPA Certificate #US22-0032). LEV III SULEV30 compliance verified for 2024 models.
Power Ratings: Measured under SAE J1349 standards. Full output requires 87 RON fuel (GM TIS Doc. A34035).
General Motors Technical Information System (TIS): Docs A34135, A34560, SIB 23-NA-011
EPA Certification Database (Certificate #US22-0032)
SAE International: J1349 Engine Power Certification Standards
The Chevrolet LMT was used across Chevrolet's GMT3XX platform with longitudinal mounting and shared with GMC for North American market adaptations. This engine received platform-specific tuning—reinforced cooling in the Colorado ZR2 and revised torque curve in the Blazer SS—and from 2023 the facelifted Blazer SS adopted a revised balance shaft gear, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side cylinder block near the exhaust manifold (GM TIS A34235). The 8th VIN digit indicates engine family ('L' for LMT series). Pre-2023 models have silver valve covers with black turbocharger housings; post-2023 units use black valve covers with red accents. Critical differentiation from non-turbo variants: LMT engines feature a high-pressure fuel pump on the left side and a water-cooled turbocharger. Service parts require production date verification—balance shaft assemblies for pre-2023 models are incompatible with post-facelift revisions due to redesigned gear profile (GM SIB 23-NA-011).
The LMT's primary reliability risk is balance shaft drive gear wear on early builds, with elevated incidence in off-road use. Internal GM quality reports from 2023 noted a significant share of pre-2023 engines requiring gear replacement before 100,000 km, while EPA field data links a portion of emissions-related failures to catalyst degradation in high-heat environments. Prolonged low-speed operation and high-load conditions increase gear and catalyst stress, making warm-up/cool-down procedures and oil quality critical.
Analysis derived from GM technical bulletins (2022-2024) and EPA field failure statistics (2023-2025). Repair procedures should follow manufacturer guidelines.
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