Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner past midnight.
Can I get the year model of the vehicle?
I need to confirm you are following the exact steps for programming. Look them over in the file below and report back.
Prior to completing the mandatory rating at the top of your screen. Let me know if I have not yet provided you with ~5 STAR EXCELLENT~service. Reply and let me know in more detail what you need to be pleased with my help.
Based on step 10 the LGM needs to be replaced because the module will not enter programming mode.
I can only be sure if I have the results from you doing each of the tests. Rarely ever are manufacturers diagnostic steps wrong if all steps are done in order and correct.