RE: 06 Silverado Keyless Entry problem
I had similar problems when I purchased a handful of remotes off ebay. Numbers matched but programming them the same way my friend programmed his 2003 didn't work for me. Make sure the proceedure is correct. Then again the remote might just be bad or the battery in it might be dead or dying.
What is exact the proceedure you are using? You tuning the key on and off a few times?
99' Silverado 5.3 4X4
Modified Predator 93 tune: TQM @ 40%, injector slope bumped up 4 levels,
125 MPH top speed, 5500 RPM limit,
TBS, 180 thermostat, 4" CAI with 9x6" element,
Bypass and De screen performed,
AVG: 16 MPG City, 20 MPG Highway