2008 Chevrolet Silverado 1500 LT2 4dr Extended Cab 6.5 ft. SB (5.3L 8cyl 4A)
The Chevy dealer said that this was "Normal an that it was the alternator" kicking in.
The truck while driving at any/every speed will idle up an then back down about 100 RPM's.
I have put duel flowmaster exaust on it and now this is undeniable.
You can also feel it in the truck itself when it kicks in almost every 30 seconds or so.
I payed alot for this truck, and work hard for my money.
I hate beign lied to an I feel like that is just what Chevy did!
Do any of you guys know what this might be, or what it sounds like?
Thanks for the help,