Hey guys I need help!!!

[Rado_Runner]

Hey everyone new to the forums. Long time lurker, first time poster. I'm having a problem I hope one of you guys may be able to help me with. For about the past 6 months my truck has been experiencing various power loss/shifting problems.

 

First off while on the freeway if I try to get on it and hit passing gear, the truck only sometimes kicks passing gear in. Other times it stays in overdrive and just slowly increases the rpms. Resulting in very little acceleration.

 

Secondly, when I come up to a stop sign and fully stop, the truck acts very sluggish when it takes off from the stop sign. The rpms go up quickly but it seems like there is something drag the truck back like a anchor.

 

I've checked the air filter, cleaned the maf and throttle body, had both shift solenoids and transmission fluid changed three months ago, and just did all the brakes. Transmission shifts fine in neutral. I'm just lost at this point.

 

I'm also thinking it may be the tps, aps, or the vss, but like I said I'm lost in finding out for sure.

 

If anyone could help guide me that would be greatly appreciated!!!

 

2006 silverado 1500, 5.3, 4l60e, 2 wheel drive, 152000 miles, oil changes every 5,000 miles, transmission fluid and shift solenoids just changed. Let me know if I'm missing anything.