This listing is for a custom reflash of your Gen III engine computer that is sent to me, covering the 1997-2006  LS1, LS2, LS6 and 4.8L, 5.3L, 6.0L and 8.1L engines, and the 1998-2000 Vortec 4.3, 5.0, 5.7 and 7.4L "blackbox" pcm.

Cost $50 includes shipping back to you. Purchase button
(add to cart) at bottom of page. Please read description carefully.

This will cover the years from 1997 through 2006 that use the LS style or "blackbox" style  PCM ( powertrain control module) only.   The pictures are an example of the pcm you must send me. 

1997-98 LS1                        1999-2007 LS1                  1996-2000 Vortec 4.3L, 5.0, 5.7, 7.4L

The reflashing covers only the listed items below:
  • Removal of the vehicle antitheft security (VATS) option . This will cause a 2 second start and die symptom if not removed.
  • Fan 1 and Fan 2 on/off temperatures. Stock 104/100  108/104 will be used unless otherwise specified.
  • Add or delete fans
  • Rear gear ratio change- especially important if swapping into another vehicle.
  • Tire size-especially important- tire size must be listed as 2xx-xx-xx or tire diameter, not just rim size.
  • AC delete-removes sensor, relay monitoring, esp. for older vehicles.
  • Transmission type, covering even the older THM350, 400, 700R4, 4L60 (non electronic). Must let me know what transmission you are running.
  • Remove rpm limiter*  see below
  • Remove speed limiter* see below
  • Remove emission controls   (includes removing the rear O2 sensors)** see below
  • Change VIN - only necessary if you are swapping a computer into the same vehicle.
  • Change tach signal to match your 6 or 8 cylinder tachometer (stock or aftermarket)
  • Remove transmission range (gear switch) that was used on 1997 and later vehicles.
      I don't do any tuning (cam change, headers, injectors). This is just to get your vehicle running. You must list what you need to be done to your pcm, don't assume that something will or will not be changed.  Ask questions.  Contact me at

I dont do pcm's for aviation or marine use.

NOTE: If you are sending me a pcm that was not originally with the engine, you must contact me with the service number of the ecm, i.e. 12200411 to see if it is compatible, some service numbers, especially from 2003 on up will not work with program from different years.  
For example,  if you are swapping drive by wire to a drive by cable 
The computer you send me must be a known working item.

If there is any questions, message me.  I have been reflashing pcms for over 15 years so you can be confident it will be done right.  Your pcm will remain unlocked.

Once I receive your computer, turn around is generally one day and will be sent back to you via USPS priority with tracking and insurance. Excluding Sundays and Holidays.  FREE SHIPPING in the UNITED STATES ONLY.  Why pay twice for shipping? 

Be sure your shipping address is updated and current.  I will ship only to your paypal address listed!

Please don't purchase until you have all your information and ready to ship. 

Once you make purchase, I will message you address to ship to. Please email me at so I can do this. Paypal does not automatically send me a notice. Thank you.

 Please pack well to avoid damage, not responsible for damaged or missing items. 

 * It is responsibility of the purchaser of this service to observe all traffic laws and purchase of the service is an agreement that the seller is not held liable for any damages or judgments that may arise. 
** It is the responsibility of the purchaser of this service to comply with any or all emission laws in their jurisdiction and purchase of this service is an agreement the seller is not liable for any damages or judgments that may arise.

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