You will have to order a j2534 pass thru device and sign up with GM's aftermarket Techline so that you can program the module. It's $45 USD for one vehicle, for 2 years.
https://www.acdelcotds.com/subscriptions#
Be cautious of the device you buy, there are a lot of cheap Chinese knock-offs out there. The legit ones are fairly pricy at about $1500 USD.
This doesn't really sound like an option for you, so your best bet is to take it to a well established, independent shop that has the necessary equipment to do this, or sell it as is.
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David
'16 2SS M6 black on black, SW long tube full exhaust, NPP, Roto-fab CAI, ported stock TB
'16 2SS M6 black w/Metallic black stripes, Kalahari, 6 piston front (totaled 1/22/20)
'14 Fusion Titanium 2.0T
'83 Jeep Wagoneer