NEED HELP Programming door farb

[Gmc richy]

I have a 2004 GMC Canyon and it will not go into programming mode to program a key fob any suggestions

 

[Mooseman]

Has this truck ever have a fob?

 

[MRRSM]

Welcome to GMT Nation...

You've probably followed these instructions to the letter...but JIK ... Here are the ACDelco Instructions for this "Job with The Fob". Take note of the comments in the PDF about requiring a "Dealer Scan Tool" in order to finalize these actions: