Collection: ECU Reflashing Services - ECM, PCM, TCM & BCM - VATS off & MAFFLESS

GM Holden Factory Reflashing Services – using HP Tuners, we can reprogram your Factory ECM PCM or TCM.

No LS Conversion is complete without a full VATS Delete or VATS Removal. VATS, or Vehicle Anti Theft software, is, as the name suggests, GM’s in house anti-theft software. If the signal from the factory programmed key, isn’t received, the vehicle will not run for more than one second. An LS VATS Removal, turns off this software, allowing the factory computer to be used without the need for a BCM and Key Reader, both of which are commonly removed in most LS Swap Wiring Kits & LS Standalone Harnesses.  

Whilst we are completing the VATS delete, we can also flash onto the computer a MAFLESS or Speed Density base tune. These are sometimes referred to as an LS MAFLESS Tune, which allows the engine to run without the MAF (Mass Air Flow) Sensor. Please note, these services should be used in conjunction with either our standalone harnesses found here or our plug and play wiring harnesses found here.

Applicable to the following ECU's
LS1 (P01, P59), E40, E38, E67, T42 plus more

Occasionally, previous flashing can result in a LOCKED ECU or PCM. We offer Locked LS ECU Unlocking or Tunerlock Removal Services, allowing the ECU to be tuned freely afterwards. Please see below.


These acronyms and more are explained in more detail in our tech help blog posts, found here.

2 products
  • PCM / ECM / ECU Bench Reprogram Reflash - VATS Removal - MAFLESS Base Tune
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  • TUNERLOCK REMOVAL - LS1 PCM (P01 P59)
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    from $350.00
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