HP Tuners Tuning Services
Midgard Industries provides tuning support for GM vehicles using HP Tuners, including LS engines and GM truck platforms. From basic adjustments to full drivability tuning, we can help optimize your vehicle's performance.
- ✓ P01, P59, E38, E67 & E78
- ✓ Remote tuning support
- ✓ LS swaps & factory ECUs
Supported Platforms & ECUs
HP Tuners VCM Suite supports a wide range of GM factory ECUs. These are the platforms and controllers most commonly tuned through Midgard Industries.
Supported Vehicle Platforms
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GM LS Engines
Gen III and Gen IV LS platforms in cars, trucks, and swap applications. HP Tuners is the most widely used software for LS ECU calibration work.
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GM Trucks & SUVs
Silverado, Sierra, Tahoe, Suburban, Yukon, and other GMT800 and GMT900 platform vehicles with factory LS or Vortec engines.
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LS Swaps Using Factory ECUs
P01 and P59 PCMs retained in swap builds require HP Tuners or TunerPro for VATS removal, injector configuration, and full calibration changes.
GM Factory Controllers
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✓
P01
1999–2002 Gen III LS cars and trucks. Red/blue connectors. Most common factory ECU in early LS swap builds.
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✓
P59
2003–2007 Gen III LS cars and trucks. Green/blue connectors. Expanded memory and tuning resolution over P01.
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✓
E38
2006–2013 Gen IV LS2/LS3/LS7 cars and trucks. Used in Corvette, Camaro, and full-size truck applications.
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✓
E67
Gen IV truck applications with 4.8, 5.3, 6.0, and 6.2 VVT engines. Common in later iron-block swap builds and truck performance builds.
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✓
E78
Used in 2010+ GM trucks and SUVs with 4.8 and 5.3 Vortec engines. Common platform for drivability and mild performance tuning.
HP Tuners Services
HP Tuners provides access to nearly every calibration table in the GM ECU. These are the most common service areas for LS and GM truck tuning work.
Fuel & Injector Calibration
Accurate fueling is the foundation of every tune. Fuel table corrections, injector flow rate and dead time setup, and closed-loop fueling refinement for clean, consistent AFR across all operating conditions.
- Fuel table adjustments (VE-based)
- Injector flow rate and offset data
- Speed density and MAF-based fueling
- Closed-loop and open-loop refinement
Timing & Idle Tuning
Spark calibration for maximum safe power on pump gas or race fuel, along with idle quality improvements for cammed and modified engines.
- Ignition timing table adjustments
- Knock retard threshold and recovery
- Idle airflow and IAC calibration
- Cam idle adjustment for aftermarket cams
Transmission Tuning
4L60E and 4L80E shift quality, line pressure, and TCC lockup strategy configured for the correct rear gear, tire size, and driving style.
- Shift table adjustments
- Line pressure calibration
- TCC lockup strategy
- Gear ratio and tire size configuration
LS Swap Calibration
All the essential changes required to get a factory ECU running correctly in an LS swap application.
- VATS removal
- Electric fan control setup
- MAP sensor configuration
- Emissions DTC cleanup
Speed Density Tuning
Full MAP-only speed density configuration including VE table base calibration and MAF disable for builds without a MAF sensor or with aggressive camshaft profiles.
- MAF sensor disable
- MAP sensor scaling
- VE table base calibration
- Idle airflow adjustment
Drivability Tuning
Log-based refinement of part-throttle, cruise, and transient fueling to eliminate stumbles, surging, and poor throttle feel across everyday driving conditions.
- Tip-in and transient fueling
- Part-throttle cruise refinement
- Cold start enrichment
- Data log review and revisions
Common Problems We Solve
These are the most frequent GM LS and truck calibration issues that can be resolved through targeted HP Tuners adjustments.
Hard Starting & Rough Idle
Hard hot or cold starts and unstable idle quality are typically fueling, prime pulse, or idle airflow issues. On modified and cammed engines, the stock idle calibration is rarely adequate and requires targeted adjustments to hold a clean, stable idle.
Throttle Response & Fuel Economy
Tip-in stumbles, flat spots off idle, and poor part-throttle response are accel enrichment and transient fueling issues. Running too rich at cruise directly hurts fuel economy and can be corrected with targeted VE and closed-loop adjustments.
Transmission Shift Issues
Harsh, soft, or incorrectly timed shifts in the 4L60E and 4L80E are a calibration issue. Shift tables, line pressure, and TCC lockup strategy can all be adjusted in HP Tuners to get the transmission shifting correctly for the vehicle's actual gear ratio and use case.
Ideal For
HP Tuners calibration work is available for any build running a supported GM factory ECU.
Factory P01 and P59 PCMs in swap builds needing VATS removal and full startup calibration.
Stock or mildly modified GM trucks and cars needing drivability improvements and fuel economy optimization.
Cammed, headed, and stroked LS builds that need a full calibration to match the engine combination.
GMT800 and GMT900 trucks with intake, cam, or exhaust modifications that need the ECU updated to match.
Tuning Options
HP Tuners calibration work is available remotely for customers anywhere in the country, or in-person for customers in the Longview, Texas area.
Startup Calibration
A starting calibration built from your build specs — engine, cam, injectors, MAP sensor, and transmission — before the engine is run for the first time. Covers VATS removal, injector setup, fan control, and base fueling for LS swap applications.
Remote Tuning
Send your HP Tuners log files and current calibration file. Tune revisions are returned electronically. If you don't have HP Tuners hardware, tune file-only service is available. Works for customers anywhere in the country.
Drivability Optimization
A complete log-based calibration refinement cycle covering idle, cold start, part-throttle, cruise, and wide-open throttle. Multiple log-and-revise passes until the vehicle drives cleanly across all operating conditions.
Contact Midgard Industries for HP Tuners tuning services.
Send your build details and we will put together a quote. Include as much information as you have about the vehicle, ECU, and what you are trying to achieve.
- Vehicle and ECU type (P01, P59, E38, E67, E78)
- Engine combination (displacement, cam, injectors)
- Transmission type and rear gear ratio
- Current calibration file and log files if available
- Description of issues or tuning goals
Charlie Moyer — Longview, Texas
LS and GM truck EFI calibration specialist serving Longview, East Texas, and remote customers nationwide. All work is data-driven using real datalogs.
Related LS & EFI Resources
More guides and services for your LS and GM build.
P01 vs P59 LS ECU Guide
Compare the two most common Gen III LS factory ECUs side by side.
Read GuideLS Speed Density Tuning
How speed density works and when to use it on an LS swap build.
Read GuideLS Swap Startup Checklist
Everything to verify before cranking your LS swap for the first time.
View Checklist