2004 Chevy Suburban TPMS question

I have a 04 Chevy Suburban and I just got a new TPMS sensor the Left Rear. I drop no more than 3 miles from the tire shop and the TPMS light went on.. Any help?

Source: The TPMS Forum http://www.thetpmsforum.com
2004 Chevy Suburban TPMS question