GMC ENVOY THROTTLE BODY REPLACE/REMOVE

I'm Going To Replace The Throttle Body In Denali.I've Been Told I Have To Have Someone Reprogram The Computer. Is There Any Way This Can...

When At 800-900 Rpm Idle Is Fine (put My Foot On Gas With Other Foot On Brake To Achieve Smooth Idle). Problem Seemed To First Begin When I...