Hi all just want to say this site is great. I just bought a new 04 Silverado with a 5.3 and could not understand why it seemed so slow to me. I had a 00 i bought new and it was a hell of a lot quicker. After lurking for a while i learned alot and now think i know why. Torque Management. I just ordered a tune from Allen and hope this will solve my problem but first i had to learn the hard way. I bought that peice of crap HT111 and it didnt seem to do much but i got lucky they gave me a full refund. I learned another thing, i didnt know this was your site Allen. If you read this great job. and buy the way im still waiting for the tracking # for the PCM. Sorry but i just cant wait to plug that baby in. Darryl