Chevrolet Uplander 3.9 V6: Specs, Tuning Tips & Performance Potential

9 October 2025

Hey, we are HP Chiptuningfiles – Europe’s leading ECU tuning file service provider. We deliver custom, dyno-tested tuning files for diesel, petrol & hybrid engines, trusted by 4,000+ clients worldwide. If you're owning a Chevrolet Uplander and want to enhance its 3.9L V6 performance, our hp chiptuning files can provide safe, efficient upgrades. In this comprehensive guide, we'll explore the motor 3.9 Chevrolet Uplander specs, tuning potential, and actionable steps to boost power and efficiency.

What Is the Motor 3.9 Chevrolet Uplander?

The Chevrolet Uplander, produced from 2005 to 2009, is a practical minivan designed for families, offering seating for up to seven passengers and versatile cargo space. The 3.9L V6 engine, known as the LZ9 in GM's High Value engine family, was introduced in 2006 as an upgrade over the base 3.5L, providing more power for highway merging and towing. This pushrod V6 emphasizes reliability and torque, making it suitable for daily driving rather than high-performance applications.

Direct answer for snippet: The motor 3.9 Chevrolet Uplander is a 3.9L V6 engine (LZ9) producing 240 hp and 240 lb-ft of torque, paired with a 4-speed automatic transmission in FWD configuration.

While not a sports car, the Uplander's engine shares architecture with models like the Chevrolet Impala and Pontiac Montana, opening doors to shared tuning parts. For similar Chevy engines, check our Chevrolet 4.8L V8 Tuning Guide.

Detailed Specifications of the Chevrolet Uplander 3.9 V6

The Uplander with the 3.9L engine was available in LS and LT trims, focusing on comfort and utility. Below, we break down key specs based on manufacturer data and independent reviews.

Engine and Performance Specs

The LZ9 is a naturally aspirated, flex-fuel capable V6 in some variants, with variable valve timing (VVT) for improved efficiency.

• Displacement: 3,880 cc (3.9L)

• Configuration: 60-degree V6, pushrod (OHV) with 2 valves per cylinder

• Horsepower: 240 hp (179 kW) @ 6,000 rpm (some sources note 243 hp)

• Torque: 240 lb-ft (325 Nm) @ 4,800 rpm

• Compression Ratio: 9.8:1

• Fuel System: Sequential fuel injection, E85 compatible in later models

• Redline: Approximately 6,500 rpm

• 0-60 mph: Around 8.5-9 seconds

• Top Speed: Electronically limited to 108 mph

• Fuel Economy: 16 mpg city / 23 mpg highway / 19 mpg combined

This engine delivers smooth power for a minivan, with strong low-end torque for loaded drives. For comparison to other GM V6s, see our Pontiac Grand Prix Tuning Guide L67 V6 LS4 V8 Performance.

Transmission and Drivetrain

• Transmission: 4-speed automatic (4T65-E) with overdrive

• Drivetrain: Front-wheel drive (FWD) standard; no AWD option

• Towing Capacity: Up to 3,500 lbs when properly equipped

• Gear Ratios: Designed for efficiency, but can feel sluggish under heavy load

The FWD setup aids handling in everyday scenarios. Learn more about FWD systems in our FWD Front Wheel Drive Explained.

Suspension, Brakes, and Dimensions

• Suspension: MacPherson strut front, twist-beam rear with optional self-leveling

• Brakes: 4-wheel disc with ABS

• Wheels/Tires: 17-inch alloys with 225/60R17 tires

• Length/Width/Height: 204.3 in / 72 in / 72 in

• Wheelbase: 121.1 in

• Curb Weight: 4,470-4,650 lbs

• Cargo Space: 26.9 cu ft behind third row; up to 136.5 cu ft with seats removed

• Seating: 7 passengers standard

These specs make it family-friendly, with room for tuning to improve responsiveness. Explore compatible hardware on our Hardware page.

Here's a quick specs table:

Category	Specification
Engine Type	3.9L V6 LZ9, 240 hp @ 6,000 rpm
Torque	240 lb-ft @ 4,800 rpm
Transmission	4-speed automatic
Drivetrain	FWD
Fuel Economy	16/23/19 mpg (city/hwy/comb)
0-60 mph	8.5-9 seconds
Towing Capacity	3,500 lbs
Weight	4,470 lbs
Dimensions (L/W/H)	204.3 / 72 / 72 in

Understanding ECU Tuning for the Chevrolet Uplander 3.9 V6

ECU tuning remaps the engine control unit to optimize fuel, ignition, and VVT parameters, unlocking hidden potential in the LZ9 engine. For the Uplander, this means better throttle response, increased power for towing, and potential fuel savings.

At HP Chiptuningfiles, our chiptuning file service tailors files to your vehicle's ECU, whether via OBD or bench mode. For tuning basics, read our ECU Programming vs Reprogramming Guide 2024.

How Does ECU Tuning Work?

Tuning involves reading the ECU file, modifying maps, and flashing the updated version. Tools like KESS V3 are ideal—see our KESS V2 vs V3 KESS3 Guide. Gains are safe with dyno testing, avoiding engine stress.

Tuning Potential and Expected Gains

The 3.9L LZ9 has moderate tuning potential due to its robust design, but limited aftermarket support as a minivan engine. ECU remaps can add 20-30 hp and 30-40 lb-ft, while bolt-ons push it further.

• Stock Limitations: Conservative factory mapping leaves room for optimization.

• Max Potential: With forced induction, over 300 hp possible, but rare for Uplanders.

• Fuel Savings: Up to 10-15% with efficient maps.

For more on gains, check How Much HP Does a Tune Add.

Stage 1 Tuning: ECU Remap for Basic Gains

Stage 1 focuses on software tweaks without hardware changes, ideal for stock Uplanders.

• Gains: +20-25 hp, +25-35 lb-ft

• Benefits: Smoother acceleration, better MPG

• Process: OBD flash with custom file

• Cost: €300-500

Our hp tuning files ensure compatibility. Buy credits to start.

Stage 2 Tuning: Bolt-On Modifications

Add intake, exhaust, and headers for airflow improvements.

• Key Upgrades: Cold air intake, cat-back exhaust, high-flow catalytic converter

• Gains: +30-40 hp, +40-50 lb-ft

• Pros: Enhanced sound, quicker response

• Considerations: May need AFM disabler for VVT.

See our Dyno-Tested ECU Tuning Files for matched remaps.

Stage 3 Tuning: Advanced Builds and Forced Induction

For enthusiasts, add superchargers or internals.

• Upgrades: Supercharger kit, forged pistons, upgraded fuel system

• Gains: +100+ hp (300+ hp possible)

• Applications: Custom projects, but rare for minivans

• Risks: Higher costs, potential reliability issues

Our trusted safe ECU tuning solutions minimize risks.

Stage 1 vs Stage 2 vs Stage 3: Comparison Table

Stage	Modifications	Power Gain	Cost	Suitability
Stage 1	ECU remap only	+20-25 hp	€300-500	Daily use
Stage 2	Intake, exhaust, remap	+30-40 hp	€800-1,500	Family performance
Stage 3	Forced induction, internals	+100+ hp	€3,000+	Custom builds	For details, read Stage 1 2 3 ECU Tuning Guide.

Pros and Cons of Tuning the Uplander 3.9 V6

Pros

• Improved towing and acceleration

• Fuel efficiency gains

• Customizable with our ecu file service

Cons

• Potential warranty void

• Limited aftermarket for minivans

• Emissions concerns

Address issues with professional tuning.

How to Tune Your Chevrolet Uplander Safely

1. Scan for Codes: Check faults like P0420—see P0420 Fault Code Causes Fixes Tuning.

2. Read ECU: Use OBD or bench ( OBD vs Bench vs BDM Tuning ).

3. Upload File: To our tuning file database.

4. Flash and Dyno: Test for optimal results.

5. Maintain: Monitor with diagnostics.

Create an account for expert help.

Outbound links: For specs, visit Edmunds; tuning forums at 60DegreeV6.com; or Autoevolution for overviews Autoevolution Uplander.

Why Choose HP Chiptuningfiles for Uplander Tuning?

As leaders in hp chiptuning, we offer files for GM engines like the LZ9. Our dyno-tested approach ensures safety—check Why Custom ECU Tuning Files Matter in 2025. Stay updated on News.

Visit About Us or contact us for quotes.

FAQ

What are the specs of the motor 3.9 Chevrolet Uplander?

The 3.9L V6 LZ9 produces 240 hp and 240 lb-ft torque, with a 4-speed automatic and FWD.

What is the tuning potential for Chevrolet Uplander?

ECU remaps add 20-30 hp; advanced setups can exceed 300 hp with superchargers.

Is tuning safe for my Uplander 3.9 V6?

Yes, with custom dyno-tested files, it enhances performance without compromising reliability.

How do I get started with Uplander tuning?

Upload your ECU file to our Chiptuning Files, buy credits, and get modified files.

Ready to tune? Contact support at HP Chiptuningfiles, your expert for chip tuning files.