2005 Hummer H2 Engine – 6.0L LQ4 V8
6.0L V8 | LQ4 | VIN U – 8th Digit | Gasoline | Naturally Aspirated
Looking for a 2005 Hummer H2 engine? This page is specifically for the 6.0L LQ4 V8 identified by VIN U in the 8th digit.
The Hummer H2 uses the Vortec 6000 6.0L V8, and Hummer service information identifies this engine as RPO LQ4 / VIN U.
Before ordering a used engine, verify your complete VIN and original engine configuration to make sure the replacement matches your H2.
Have your VIN ready? We can help verify fitment.
2005 Hummer H2 6.0L Engine Overview
The 2005 Hummer H2 is equipped with a 6.0L V8 gasoline engine. The engine is identified as the Vortec 6000 / LQ4, with VIN U used as the engine-code character in the vehicle VIN.
The LQ4 is a naturally aspirated V8 with approximately 5,967 cc of displacement, producing about 325 horsepower and 365 lb-ft of torque in the 2005 H2.
2005 Hummer H2 6.0L LQ4 Engine Specs
This application covers the 6.0L LQ4 V8 with VIN U in the 8th digit. Compare these details with your original engine before requesting a replacement.
| Specification | Details |
|---|---|
| Year | 2005 |
| Make | Hummer |
| Model | H2 |
| Engine | 6.0L V8 |
| Engine Family | Vortec 6000 |
| RPO Code | LQ4 |
| VIN Code | U – 8th Digit |
| Displacement | 5,967 cc / 363.9 CID |
| Cylinders | 8 |
| Aspiration | Naturally Aspirated |
| Fuel Type | Gasoline |
| Fuel System | SFI |
| Valvetrain | OHV |
| Valves | 16 |
| Horsepower | 325 HP |
| Torque | 365 LB-FT |
| Transmission | 4-Speed Automatic |
| Drivetrain | 4-Wheel Drive |
Need the Right 2005 Hummer H2 Engine?
A 6.0L Hummer engine is not enough information to guarantee the correct replacement.
For this application, the important combination is:
2005 Hummer H2 + 6.0L + LQ4 + VIN U
The H2 owner’s manual confirms that the 8th VIN character is the engine code and helps identify the correct replacement parts.
Send us your VIN and we’ll help verify the correct engine before you order.
VIN-based fitment assistance • Used replacement options • Nationwide availability
How to Identify the Correct Hummer H2 Engine
The easiest way to identify the correct 2005 Hummer H2 engine is to compare several pieces of information instead of relying only on the 6.0L size.
| Fitment Check | What to Confirm |
|---|---|
| Year | 2005 |
| Vehicle | Hummer H2 |
| Engine Size | 6.0L |
| VIN | U in the 8th digit |
| RPO Code | LQ4 |
| Engine Family | Vortec 6000 |
| Configuration | Naturally Aspirated V8 |
The service manual identifies the H2 6.0L engine as RPO LQ4 / VIN U.
Not sure what your VIN says?
What Is the LQ4 6.0L Engine?
The LQ4 is the Vortec 6000 6.0L V8 used in the 2005 Hummer H2.
The engine has approximately 5,967 cc of displacement, eight cylinders, overhead valves and a naturally aspirated configuration. Published H2 specifications list approximately 325 horsepower and 365 lb-ft of torque.
For replacement purposes, however, the engine’s displacement is only one part of the identification. The LQ4 RPO code and VIN U application should also be confirmed.
Signs Your Transmission May Need Attention
Transmission problems can develop gradually or appear suddenly. These common symptoms may indicate that your 4L60E needs inspection, diagnosis or repair.
Delayed Engagement
A noticeable delay when shifting into Drive or Reverse can indicate a hydraulic, fluid or internal transmission issue.
Transmission Slipping
Engine RPM rises without normal acceleration, especially during gear changes or under load.
Harsh Shifting
Hard, abrupt or unusually rough shifts between gears may indicate a control or internal transmission problem.
Loss of Reverse
If Reverse stops working or engages inconsistently, the transmission and shift system should be inspected.
Unusual Noise
Whining, grinding, humming or other abnormal sounds can be signs of internal wear or damage.
Fluid Problems
Low fluid, visible leaks or contaminated transmission fluid can affect shifting and transmission operation.
Important: These symptoms do not always mean the entire transmission needs replacement. Fluid level, linkage, electrical controls, sensors and other components should be checked before choosing a replacement transmission.
Why Choose AutomartAutoparts?
Finding the right used engine or transmission can be stressful, especially when you're not sure about compatibility, availability, or where to find the right replacement. Automart Auto Parts helps make the process simple. We have helped many customers find replacement engines and transmissions for a wide range of vehicles, and our parts specialists are here to help you identify the right option for your vehicle.
With so many used engines for sale online, finding the correct replacement can be difficult. Automart Auto Parts helps make the process simpler by helping customers identify appropriate used engine applications based on their vehicle information.
With multiple warehouse locations across the state, we can help customers connect with available parts closer to their area. Our network and inventory sources allow our team to check available replacement engines and transmissions based on your vehicle's requirements.
Trusted by Customers
We've helped many customers with their replacement engine and transmission needs, providing assistance throughout the process.
Multiple Warehouse Locations
With multiple warehouse locations across the state, our network helps us serve customers in different areas and check for available parts closer to them.
Fitment Assistance
Not sure which engine or transmission you need? Our parts specialists can help verify your vehicle and part information before you move forward.
Availability & Pricing
We can check current availability and provide pricing information based on the replacement part your vehicle requires.
A Simpler Way to Find Your Replacement Part
You don't have to spend hours comparing used motors for sale and trying to determine which engine will work with your vehicle.
Tell our team your vehicle's year, make, model, engine size and VIN when available. Our parts specialists can use that information to help identify the appropriate replacement application and check available options.
Whether you need a used engine for a car, truck or SUV, starting with accurate vehicle information makes it easier to narrow down the correct replacement.
Looking for a 2005 Hummer H2 Engine?
Check the application below before requesting availability:
2005 Hummer H2 • 6.0L V8 • LQ4 • VIN U
Whether you searched for a Hummer H2 engine, Hummer motor, or used Hummer engine, start with VIN verification before ordering.
How It Works
Finding the right replacement engine or transmission is simple. Tell us about your vehicle and our parts specialists will help you find the right replacement option.
Tell Us Your Vehicle
Provide your vehicle's year, make, model and engine or transmission information. We may also ask for your VIN to help confirm compatibility.
Tell Us What You Need
Let us know whether you're looking for a used engine, replacement engine, used transmission or replacement transmission.
We Check Availability
Our parts specialists check available inventory and supplier options to help identify a suitable replacement for your vehicle.
Get Your Quote
Once an appropriate option is identified, our team can provide available pricing and relevant part details for you to review.
Frequently Asked Questions
Find answers about the 2005 Hummer H2 6.0L LQ4 engine, VIN U identification and replacement-engine fitment.
What engine does this page cover?
This page covers the 2005 Hummer H2 6.0L V8 with RPO LQ4 and VIN U in the 8th digit.
What does VIN U mean?
For this Hummer H2 application, U is the 8th VIN character used as the engine code. The owner's manual explains that the 8th VIN character helps identify the engine, specifications and replacement parts.
What is the LQ4 engine?
LQ4 is the GM Vortec 6000 6.0L V8 engine used in the Hummer H2. Hummer service information identifies the H2 6.0L engine specifically as RPO LQ4 / VIN U.
How large is the LQ4?
The 2005 Hummer H2 LQ4 has approximately 5,967 cc or 363.9 cubic inches of displacement.
Is the H2 LQ4 naturally aspirated?
Yes. The 2005 H2 LQ4 is a naturally aspirated gasoline V8. It is not a turbocharged or supercharged engine application.
How much horsepower does the 6.0L H2 engine produce?
Published 2005 H2 specifications list approximately 325 horsepower and 365 lb-ft of torque. These figures are useful for reference, but VIN and application identification are more important when selecting a replacement engine.
What transmission does the 2005 Hummer H2 use?
The 2005 Hummer H2 is listed with a 4-speed automatic transmission and four-wheel drive.
Is every GM 6.0L engine the same as the H2 LQ4?
No. GM used multiple 6.0L engine applications across different vehicles. A replacement should be matched using the vehicle, VIN, RPO code and engine application, rather than displacement alone.
Can I order this engine using only "2005 Hummer H2 6.0L"?
It is better to verify the VIN and engine code first. The H2 owner's manual identifies the 8th VIN character as the engine code, making VIN verification an important part of replacement-parts identification.
Where can I find the VIN on a 2005 Hummer H2?
The VIN is located on a plate at the front corner of the instrument panel on the driver's side. It can be viewed through the windshield from outside the vehicle. The VIN also appears on the vehicle certification and service-parts labels.
Where is the Service Parts Identification label?
The H2 owner's manual states that the Service Parts Identification label is located inside the glove box. It contains the VIN, model designation, paint information and production options or special equipment.
Is this a complete engine with all accessories?
Not necessarily. Used engine assemblies can vary in what external components are included. Items such as the alternator, A/C compressor, starter and power-steering pump may need to be transferred from the original engine. Always confirm the exact contents before purchasing.
What information should I send before ordering?
Provide your 17-character VIN, year, model, engine information and, when available, a clear photo of the original engine or identification label. This gives the sales team more information to verify the correct application.
How do I check availability?
Contact Automart with your VIN and vehicle information. The team can help verify the application and check available used Hummer H2 engine options.
Need a 2005 Hummer H2 6.0L Engine?
Don’t order a replacement based on “6.0L Hummer” alone.
For this application, the key combination is:
2005 Hummer H2
6.0L V8 • LQ4 • VIN U
Send us your complete VIN and let our team help verify the correct replacement engine.
VIN-based fitment assistance • Used replacement options • Nationwide availability
Explore More Engines And Transmission
Looking for a replacement engine or transmission for another vehicle?
Explore our vehicle-specific engine and transmission pages for information about engine and transmission specifications, fitment, VIN identification and replacement options.
2001 Chevy S10 │
│ 4.3L Engine
Looking for a 2001 Chevy S10 4.3L engine replacement? Automart Auto Parts can help you identify the correct 4.3L V6 application for your truck and check available replacement options. Provide your v..
2002 Chevy Monte Carlo │
│ 3.4L Engine
Looking for a 2002 Chevy Monte Carlo 3.4L engine? Automart Auto Parts can help you find a compatible used replacement engine for your vehicle. The 2002 Monte Carlo was available with a 3.4L V6 engine identifi..
2016 Hyundai Tucson | 1.6L turbo engine |
Looking for a used engine for your 2016 Hyundai Tucson? Automart Auto Parts can help you find a replacement 1.6L turbo gasoline engine for your vehicle. This app..