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Custom Flashed 12597121 PCM By Painless Performance

P/N 60701

Custom Flashed 12597121 PCM


  • Application
  • Specs
  • Larger Image
  • ECM Re-Flash
Year: 2007 - UP
Make: General Motors
Model: Truck/SUV
Engine: 4.8, 5.3, 6.0, 6.2L
Free ECM Flash American Made


This is a 12597121 remanufactured factory GM style PCM with a custom calibration made for your project vehicle and is the perfect match for these Painless Performance fuel injection harnesses:

  • 60524- 2006-UP LS2/LS3 w/4L65E, 4L80E or 4L85E
  • 60526- 2007-UP Gen IV Truck/SUV 4.8L-6.2L w/4L65E, 4L80E or 4L85E

NOTE: This PCM can only accept specific VIN number calibrations.  Please contact our tech support if you are unsure of which year VIN your engine/transmission combination will require because you may need Painless #60702 instead.

Calibration Options Include:

  • Engine/Transmission
  • Tire Size/Rear End Gear
  • Cooling Fan On/Off Temperatures
  • Vehicle Anti-theft Removal
  • Diagnostic Trouble code deletion
  • Alternator/PCM Override Delete
  • TCS/PCM Patches

Make sure you fill out the ECM Reflash Form online form after purchase.  This form provides the pertinent information we need to customize a calibration for you.  


 Custom Flashed 12597121 PCM By Painless Performance



ECM Flash Program



This is a basic start and run tune that we only recommend for a near stock application. We will only change the following parameters: delete VATS/PASS-KEY security, cooling fan on/off temperatures, rear end gear ratio, tire size, speed limiter, rpm limiter, idle rpm, and we will adjust the check engine light parameters. If your setup requires any other parameters tuned you will need to locate a local tuner. All ECMs are left unlocked to allow easy access for your tuner.

Step 1: Purchase one of the qualifying part numbers. See below for that list.

Step 2: If your part number is highlighted RED proceed to step 3B. If your part number is highlighted BLACK, proceed to step 3A.

Step 3A: If you have arrived at this step, your harness does not come with an ECM and you must provide one to be flashed. Please reference the manual with your harness to confirm the ECM part number required.

Step 4A: Once you have received your harness, please cut the Barcode label from the box as shown in the picture below.

Step 5A: Package and mail your ECM along with the Barcode label, a copy of your purchase receipt, and your ECM form that you are about to complete. (The address will be provided after you complete the form). We will pay for return ground shipping*. If you request a faster service, you will need to provide a return label.

Step 3B: If you have arrived at this step, your purchase comes with an ECM. You must fill out our ECM form BEFORE your purchase will ship. Proceed to Step 6.

Step 6: Click the “Start Here” button below to fill out our ECM questionnaire.

Step 7: Once we have the ECM, we will use the data from the form to flash the ECM. Then, once it has been flashed we will package the ECM and ship it back to you. If we encounter a question, we will contact you. This process can take 1-3 days.

Step 8: Once you receive your ECM, it is ready to go.


*Note: Our free return shipping is ONLY good for the lower 48 states, via ground UPS. If you are outside of those states, you must provide a return shipping label with your order. If your purchase comes with an ECM, the shipping will be covered via the retailer you purchased from.



Click the Start Here button below to get your FREE ECM Flash!

Click Here To Start The ECM Reflash Process


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