Program Remote

I Have A 97 Gmc Jimmy. I Bought A Remote Off E-bay With The Same Fcc Code And Was Wondering How To Program It. I Tried The On\off Method With The Ignition While Holding Down The Lock Button On The Door, But Cannot Get The Locks To Cycle (putting It In Program Mode). Is There Another Method I Should Be Using For This Vehicle? Any Help You Can Give
Would Be Much Appreciated.

I Think You,jump The # 4 And # 8 Pins On The Data Link Connector, The Locks Will Cycle. Hold The Unlock And Lock Buttons On The Remote Down At Same Time Until The Locks Cycle Agin

I Think You,jump The # 4 And # 8 Pins On The Data Link Connector, The Locks Will Cycle. Hold The Unlock And Lock Buttons On The Remote Down At Same Time Until The Locks Cycle Agin
WHAT DO YOU "JUMP" IT WITH? A PAPER CLIP OR SOMETHING?