Hey, thanks for all the help folks.
I actually got a wiring diagram specifically for my Tundra (why do they call it a taco btw

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Anyhoo - I can't figure out that diagram either! ah ha ha - man, nothing is simple is it
So, I keep hearing that the stock amp is behind the back panel behind the back seats? I haven't actually taken that panel off because, well, I thought for sure one of the two amp looking devices behind the panel where my stereo is would be the amplifier. The speaker harness from the back of the stereo plugs into this amp device, and then runs under the carpet somewhere.
The other thing is that I have cut both the red and white wires behind my stereo AND after what I think is the amp. But splicing the red wires back together gives me sound on the right speakers - the white not affecting anything.
Many people have suggested it's the red and white wires, and even the diagram I got says white and red! But . . .cripe! lol - the white wire isn't in the equation in my truck. I'm so lost
Car Toys said they'll charge me 25 bucks to label my wires for me. I'm so tired of trying to figure it out I may just do that, and of course post my findings here
Thanks for all the replies though folks, I really do appreciate it.