Hummer H2 Engine LQ4 for Sale | 6.0L V8 2003-2007 GM Truck

Description

About the Hummer H2 Engine LQ4 (6.0L V8, 2003-2007)

Need a replacement Hummer H2 6.0L LQ4 V8 engine? Part Nests sources OEM used 6.0L LQ4 V8 long blocks for Hummer H2 applications. This listing is the 6.0L LQ4 variant specifically – narrower / more specific listing than our broader Hummer H2 Engine listing which covers 6.0L Vortec (2003-2007) or 6.2L L92 (2008-2009). This listing covers the 2003-2007 Hummer H2 with the specific LQ4 6.0L V8 engine code. CRITICAL engine identification per the source data – the 6.0L LQ4 is distinct from the LM7 5.3L V8 engine (used in other GM full-size applications). Do NOT confuse the 6.0L LQ4 with the 5.3L LM7 – different displacement, different engine code, and different application configurations. Year / RPO verification by VIN required per the source data. LQ4 is part of GM’s iconic Vortec / LS-family V8 engine architecture used across various GM full-size truck and SUV applications during the era. Extensive GM cross-fit compatibility – beyond the Hummer H2 application, the 6.0L LQ4 was used across GM heavy-duty trucks (Silverado / Sierra 2500 HD and 3500), GM full-size SUVs and vans (Tahoe, Suburban, Yukon XL, Express, Savana, Avalanche). Not included: transmission, ECM, wiring, and accessories unless confirmed at order. Professional installer required; ECM matching and emissions compliance for the year required for correct install. Related Hummer H2 engine context via the broader Hummer H2 Engine listing (6.0L Vortec 2003-2007 or 6.2L L92 2008-2009). Each engine is function tested with compression checked. Call (855) 634-4447 to verify H2 year (2003-2007) and 6.0L LQ4 by VIN before ordering.

Engine and Year / RPO Verification

What Is Included and Not Included

Hummer H2 6.0L LQ4 V8 Context (2003-2007 GM Vortec / LS-Family Applications)

• Hummer H2 6.0L LQ4 V8 application: Per the source data compatibility, Hummer H2 2003 to 2007 (6.0L). The 6.0L LQ4 V8 was used in the 2003-2007 Hummer H2 applications – the earlier era of Hummer H2 production before the transition to the 6.2L L92 V8 for the 2008-2009 later era production. This listing is the 6.0L LQ4 specifically
• CRITICAL LQ4 vs LM7 distinction: Per the source data engine, 6.0L LQ4 (not LM7/5.3L). Critical engine identification distinction – the 6.0L LQ4 is distinct from the LM7 5.3L V8 engine (different displacement, different engine code). LM7 is GM’s 5.3L V8 used across various GM full-size applications – do NOT confuse 6.0L LQ4 with 5.3L LM7
• GM Vortec / LS-family V8 architecture: The 6.0L LQ4 is part of GM’s iconic Vortec / LS-family V8 engine architecture – GM’s modular V8 engine family used across various GM full-size truck and SUV applications during the era. Represents distinctive GM mid-2000s V8 engineering with LS-family engineering approach
• LQ4 vs LQ9 distinction: The LQ4 is one specific variant within GM’s 6.0L V8 lineup – distinguished from the LQ9 (higher-output 6.0L V8 variant used in some premium applications during the era). Verify specific engine code (LQ4 per this listing) at order
• Year / RPO verification critical: Per the source data year / RPO, by VIN. Critical verification requirement – specific year and RPO (Regular Production Option) code verification by VIN for correct application match. Different year and RPO variants may have distinct specific engine bay integration configurations

GM Cross-Fit Applications Context

• GM HD trucks: Per the source data compatibility, GM HD trucks – Silverado / Sierra 2500 HD and 3500. The 6.0L LQ4 V8 was used across GM heavy-duty pickup trucks – Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and GMC Sierra 3500. Represents GM’s heavy-duty pickup truck V8 gas engine option during the era
• GM full-size SUVs and vans: Per the source data compatibility, GM full-size SUVs / vans – Tahoe / Suburban / Yukon XL, Express / Savana, Avalanche. The 6.0L LQ4 V8 was used across various GM full-size SUV and van applications – Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon XL, Chevrolet Express, GMC Savana, and Chevrolet Avalanche. Represents GM’s full-size SUV and van V8 engine option during the era
• Broader cross-fit context: The extensive cross-fit list represents GM’s broad use of the 6.0L LQ4 V8 across multiple full-size truck, SUV, and van platform applications during the mid-2000s era. Verify specific application by VIN and RPO code for correct cross-fit match

Engine Function and Installation Context

• Engine function: The 6.0L LQ4 V8 engine provides primary propulsion for various GM full-size truck, SUV, and van applications – Hummer H2, GM heavy-duty pickup trucks, and various GM full-size SUV and van applications. Standard GM Vortec / LS-family V8 engine architecture
• ECM matching and emissions compliance: Per the source data swap, ECM and emissions for the year. Critical installation consideration – ECM (Engine Control Module) matching and emissions compliance appropriate for the specific model year must be observed. Different specific model years may have different specific ECM and emissions configurations
• Professional installer requirement: Per the source data tools note, a professional installer; ECM matching and emissions compliance for the year. Critical installation requirement – 6.0L LQ4 V8 installation requires professional installer with ECM matching and emissions compliance capability. Not a DIY project
• Not included items: Per the source data, transmission, ECM, wiring, and accessories unless confirmed at order. Standard scope – the used 6.0L LQ4 long block as confirmed is provided. Additional items (transmission, ECM, wiring harness, various accessories) are separate items – obtain / confirm separately as required

Related Hummer / Related GM / Related Vortec V8 Listings

• Hummer H2 Engine (broader listing): Related broader Hummer H2 engine application (6.0L Vortec 2003-2007 or 6.2L L92 2008-2009 broader coverage) – see our Hummer H2 Engine listing
• Cadillac CT6 Engine (4.2L Twin Turbo V8): Related premium V8 application (4.2L Blackwing V8 for CT6 Platinum / CT6-V) – see our Cadillac CT6 Engine listing
• SRT8 Engine: Related Mopar performance V8 application (6.1L HEMI or 6.4L/392 HEMI) – see our SRT8 Engine listing
• Various Hummer / GM / Vortec / LS-family V8 engine replacement components available across our Part Nests catalog

Engine Specifications

• Type: OEM used 6.0L LQ4 V8 long block for Hummer H2 (2003-2007) and GM cross-fit applications
• Function: LQ4 V8 provides primary propulsion for Hummer H2, GM HD trucks, and GM full-size SUV / van applications
• Configuration: 6.0L LQ4 V8, 2003-2007 Hummer H2 applications – verify by VIN and RPO
• What is not included: Transmission, ECM, wiring, and accessories unless confirmed at order per the source data
• Tools required: Professional installer; ECM matching and emissions compliance for the year per the source data
• Common failure modes: Various age-related LS-family V8 wear patterns, various age-related component wear. Symptoms include performance degradation, various engine integration issues
• Testing: Function tested, compression checked, oil pressure verified per unit before shipment

Vehicle Compatibility

Why Buy From Part Nests

• OEM verified 6.0L LQ4 V8 long block for Hummer H2 and GM cross-fit applications
• Function tested, compression checked, oil pressure verified per unit
• Support for CRITICAL LQ4 vs LM7 (5.3L) distinction
• Support for year / RPO verification by VIN
• Support for extensive GM cross-fit application context (HD trucks + full-size SUVs / vans)
• Support for ECM matching and emissions compliance for the year
• Support for professional installer requirement
• Related to broader Hummer H2 / GM Vortec V8 listings
• Free shipping to all 50 states
• 15 day replacement warranty on component defects
• Support team familiar with GM Vortec / LS-family V8 architecture and Hummer H2 6.0L LQ4 considerations
• Call (855) 634-4447 to confirm your H2 year (2003-2007) and 6.0L LQ4 by VIN and RPO before ordering.