I recently acquired a 2005 GMC Sierra with the L33 5.3, 4L60E automatic, and push button 4x4.
Every morning since I got the truck, there has been a strange issue that I can't seem to figure out.
When the truck is cold, I can't seem to get the gear shifter out of park and into any gear. It just seems stuck. I can pull it back to 'unlock' it or whatever you call it, but it just doesn't want to move. No matter how hard I press the brakes, nothing happens. Once it is warm enough, I can hear it click in the column, allowing the shifter to move throughout the gears.
After a few minutes of sitting with the heater on, for whatever reason, it will finally operate normally and then its fine for the rest of the day as long as the truck warms up first. Today, it was stuck 3 times because I only drove 1 minute at a time to each of two destinations. The brake lights operate normally when cold so I don't think it is a brake switch issue.
Anyone have any ideas on what to check or what the problem could be? Its seriously bugging me.
Edited by jmpidgeo, 28 February 2013 - 10:26 AM.