Best Tuners for 4.8 Vortec Engine Today


Quick Answer: Best Tuners for 4.8 Vortec

  1. Range Technology AFM Disable Device
  2. DiabloSport S1000
  3. Bully Dog – 40417 – GT
  4. Superchips 2845 Flashpaq F5
  5. SCT Performance – 5015P
  6. Superchips 2545 Flashcal
  7. Innovative Performance Chip
  8. Superchips 2060 Dashpaq

Vortec is the name that is widely known for the Generation III L8 engines launched by General Motors. The lifespan of this newer engine was from 1997 to 2007.

The engine works on gasoline or E85 and has a wet sump oil system with a water-based cooling system. These engines are popularly manufactured in Ontario and Michigan.

The vehicles that are fitted with the 4.8 Vortec engine are the Chevrolet Express, GMC Savana, Chevrolet Silverado, GMC Sierra, Chevrolet Tahoe, and GMC Yukon.

This engine is the smallest of the Generation III engines by GM. The power of the best version of this engine lay in the 285 HP range.

With the use of tuners, this horsepower can be improved, and there are many models in the market to achieve this.

The following section of this article reviews some of the most popular tuners for this 4.8 Vortec engine.

This section is followed by answering some of the frequently asked questions about this particular engine and the tuners that are used with it.

Best Tuners for 4.8 Vortec Compared

Here’s a comparison between Best Tuners for 4.8 Vortec

Product ImageProduct NameFeaturesPrice
Range Technology Active Fuel Management Disable Device (Blue)Range Technology AFM Disable Device
  • Wifi Enabled: No
  • Weight (Ounces): 2.4
  • Pre-Loaded Tunes: No
  • USP: Excellent value for money
S1000 DiabloSport Sprint AFM Module w/ Auto Start Stop DisableDiabloSport S1000
  • Wifi Enabled: No
  • Weight (Ounces): 0.8
  • Pre-Loaded Tunes: No
  • USP: Rated well for ease of use
Bully Dog 40417 GT Platinum Tuner for Gas ApplicationsBully Dog - 40417 - GT
  • Wifi Enabled: No
  • Weight (Ounces): 16.32
  • Pre-Loaded Tunes: Yes
  • USP: Good brand reputation
SCT Performance - 5015P
  • Wifi Enabled: No
  • Weight (Ounces): 27.84
  • Pre-Loaded Tunes: Yes
  • USP: Highly recommended by the users
Innovative Performance Chip/Power Programmer compatible with Chevrolet Silverado 1500 2.7L, 3.0L, 4.3L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L and 7.4L - Improve Fuel Mileage, Save Gas & Gain MPG, Add HP!Innovative Performance Chip
  • Wifi Enabled: No
  • Weight (Ounces): 5
  • Pre-Loaded Tunes: No
  • USP: Economically priced product

Reviews of the Best Tuners for 4.8 Vortec

Range Technology AFM Disable Device

best overall rating Range Technology Active Fuel Management Disable Device (Blue)

This particular product by Range Technology does not pack all the features of a performance tuner but instead focuses on a critical one, which is efficient power delivery by the engine.

The device is colloquially famous as the AFM Disabler.

Check out the critical features of this device in a quick video at:


Some of the critical features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Helps in delivering full power all the time
  • Higher power output even a light throttle
  • Improved fuel economy
  • Takes the load off of the AFM valve filters
  • Prevents shuddering as the engine cycles between half and full cylinders
  • Does not leave any trace after uninstallation
  • Does not hamper the warranty of the vehicle
  • Allows natural restoration to factory settings


  • Easy installation and removal
  • Allows simple plug and play via the OBD-II port
  • Gives suitable power and control over the car to traverse all terrains
  • Does not program the factory ECU
  • Lightweight at just 2.4 ounces
  • Excellent value for money


  • Some users felt that the tuner is heavy on battery usage

DiabloSport S1000

best overall rating S1000 DiabloSport Sprint AFM Module w/ Auto Start Stop Disable

All Vortec vehicles come with a factory setting that drops the cylinders and, therefore, reduces the power delivered by the engine.

While there are several products in the market to combat this setting, the DiabloSport S1000 is one of the popular ones in the AFM disabler segment.

Check out the detailed specifications of this tuner module in a quick video at:


Some of the critical features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Easy installation via simple plugging into OBD-II port
  • Compatible with a range of vehicles that have the Active Fuel Management (AFM) module
  • Eliminates exhaust buzzing caused by AFM
  • Reduces the engine hesitation during acceleration
  • Enables the car to stay in V8 mode continuously


  • Does not reprogram the vehicle ECU
  • Extremely lightweight at just 0.8 ounces
  • Customers found it very easy to install
  • Rated well for ease of use
  • Good value for money
  • Excellent mileage performance and recommended by the uses


  • Does not tamper with the DFM (Dynamic Fuel Management) feature

Bully Dog - 40417 - GT

best overall rating Bully Dog 40417 GT Platinum Tuner for Gas Applications

This performance tuner by Bully Dog is called the GT Platinum model specially designed for gas engines.

It tunes into the vehicle’s engine quickly and communicates dyno-tested tunes to optimize the performance and deliver higher torque as well as horsepower.

Check out the features of this performance tuner in a quick video.

Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Allows configuring and saving up to ten custom tunes
  • Enables dash monitoring of a wide range of parameters
  • Control over speed and rev limiters offered
  • User can adjust transmission shift points and firmness
  • Device alerts if the transmission temperature has risen too much


  • Constant monitoring and updates of several engine parameters
  • Excellent fuel economy established (up to 15)
  • Compatible with a wide range of models
  • Easy diagnosing and clearing of trouble codes
  • Ease of installation is high
  • Good brand reputation


  • Technical support could be better

Superchips 2845 Flashpaq F5

best overall rating


Superchips needs no introduction when it comes to automotive tuning. This particular model, adequately named as the ‘Flashpaq’ tuner, is one of the fastest tuners in the industry.

It can amp up the engine performance and increase the horsepower within seconds. What’s best is that it also comes with a two-year warranty offered by the manufacturer.

Check out Flashpaq in action in a quick video at:


Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • High resolution, color display (2.8 inches)
  • Updatable over the Internet for next-level performance upgrades
  • Helps to eliminate downshifting which is common while going uphill
  • Comes with increased memory and a high-speed processor
  • Provides corrections to the speedometer
  • User can make easy adjustments to the speed and rev limiters
  • Tuning options for shift firmness and points


  • Offers active TQ management
  • Performance tuning levels of Towing, Daily Driving, Extreme, and Economy offered
  • Legal in all 50 states, including California
  • Excellent technical support
  • Users rated well for mileage improvements
  • Easy to use


  • Some of the updates are chargeable

SCT Performance - 5015P

best overall rating


The Livewire TS+ is one of the newest models of performance tuners by SCT performance. This is evident from the fact that not only does it improve upon the parameters of the older models, but it also boasts of newer features.

It provides the user never-seen-before control over engine parameters.

Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Bigger screen, higher resolution, colored display (4-inch)
  • Allows switching on the fly while driving
  • Allows configuring and storing up to 10 custom tunes
  • Comes with a built-in performance calculator
  • Enables high-speed data monitoring as well as logging
  • Users can easily set alerts and warnings for different parameters
  • Gauge layouts and graphics are completely customizable


  • Control over parameters like axle ratio, exhaust pipe, DOD, fan, fuel injectors, global spark, etc.
  • Increases the fuel economy and helps in engine braking
  • Can enable or disable sound symposer
  • Helps with torque reduction when needed
  • Highly recommended by the users
  • Users found it easy to install and use


  • Users faced some computability issues with the anti-theft software

Superchips 2545 Flashcal

best overall rating


This particular model works well for the car models manufactured before and in 2016. The tool helps configure some of the minute adjustments to the engine without undertaking extensive mechanical work.

Check out the detailed specifications of this tuning tool in a quick video at:


Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Allows easy calibration and correction of the speedometer
  • Offers various TPMS options
  • Enables real-time data monitoring and logging
  • Digital display supported by the battery
  • Provides control over the speed and rev limiter
  • Packs a lot of tuning features into a compact body


  • Lightweight at just 11.2 ounces
  • Good brand reputation
  • Simple plug and play installation
  • Offers the most sought after engine tuning upgrades
  • Backed by a two-year warranty offered by the manufacturer


  • Customer support could be better

Innovative Performance Chip

best overall rating Innovative Performance Chip/Power Programmer compatible with Chevrolet Silverado 1500 2.7L, 3.0L, 4.3L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L and 7.4L - Improve Fuel Mileage, Save Gas & Gain MPG, Add HP!

This particular tuner by Innovative Performance is a very versatile model that can work with a wide range of capacities.

The performance of this tuner can be seen immediately in the increased horsepower, torque, and mileage of the vehicle’s engine.

Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Gains of 35 HP in horsepower and mileage gains up to 5 MPG
  • Optimized the air to fuel ratio
  • Installation in under 15 minutes and does not need any mechanical experience
  • Does not make any permanent changes to the vehicle’s factory configuration
  • Housed within a durable, high-strength aluminum enclosure with anodized finish


  • Economically priced product
  • Lightweight at just 5 ounces
  • Comes with a lifetime warranty and 100% money-back guarantee


  • Some customers felt that it works only for a few months

Superchips 2060 Dashpaq

best overall rating


Although one of the older tuner models of Superchips, this is still a very popular tuner for all the vehicle owners that have a 4.8 Vortec engine.

The design is created in a simple and intuitive manner that allows for comfortable user experience and greater vehicle performance.

Get an overview and some of the benefits of this Superchips tuner in a quick video at:


Some of the key features of this tuner for 4.8 Vortec are listed below.

Key USPs

  • Buttoned interface and colored display
  • The menu is straightforward to navigate and use
  • Perfect for a wide range of vehicles
  • Improvement in mileage, and towing power
  • It provides control over parameters like transmission temperature, coolant temperature, battery voltage, etc.


  • Good brand reputation
  • The high-speed processor that allows faster programming and updates
  • Different tuning options available: daily driving, towing, performance, and mileage
  • Backed by 30 years of innovation and reliability
  • Great in-cab monitor for a wide range of parameters


  • Slightly expensive


What is an AFM disabler?

AFM or Active Fuel Management is a module that comes pre-installed in some vehicles that sometimes restricts all the cylinders in the engine from firing, thereby curbing the power of the engine. AFM disablers are modules that block this feature in the car engine and allow the engine to deliver top performance.

Does my performance tuner allow me to disable AFM?

Firstly, you should check if your vehicle is fitted with the AFM feature. Secondly, after ascertaining this fact, you can look for performance tuners that are specific to your car and engine model. Some of the tuners will have the AFM disabling feature, which will allow the vehicle to stay in the V8 mode throughout. You should check the specific instruction manual for the details of this.

What is DFM, and will the tuner disable this in my Silverado?

DFM is another version of AFM. DFM stands for Dynamic Fuel Management. Tuners are usually, if not always, equipped to disable AFM. There are no models currently that disable DFM.

Can my tuner clear the engine codes?

Almost all models of performance tuners can clear the engine codes. However, engine codes are indicative of some underlying problem, and if this problem is not tackled, the codes will reappear.

Will the tuner void my warranty?

Tuners are not encouraged to be used by the vehicle’s manufacturers because they tweak some very essential engine parameters and tamper with the factory settings of the vehicle. Therefore, if there is any evidence that a tuner has been used on the engine, the warranty will be voided. However, some tuners allow the user to restore the engine parameters to factory settings. In this case, before giving the vehicle for servicing, the engine can be tuned back to factory settings.

Can my tuner cancel out the 100 mph speed limit on the vehicle?

Yes, there are speed limiter adjustments available in almost all tuners for the 4.8 Vortec that will allow one to change not only the speed limits but also calibrate the speedometer.


We have looked at quite a few types of tuners and AFM disablers that can be used with your priced possessions i.e., your cars.

Since cars are almost always very dear to you, it is imperative to carefully study the model that you own and then research the different tuners to study what they offer.

Then you should match the tuner offerings with your requirements from the vehicle.

The best match will yield the optimal results and can drive the vehicle to new heights in terms of efficiency and performance.

About Susan Brown

Susan and her husband own a mechanic shop. They do all the work themselves, from fixing cars to hunting for new customers. Susan is the brains of the operation; she writes articles on car repair-related topics based on her own experience. She loves writing about anything related to autos: diagnosing problems with cars, maintaining vehicles, and even how to choose a good mechanic!