
Originally Posted by
88RCLB
The hose is to prevent the throttle blade from icing up in cold weather. If you never see cold temps then you're fine to bypass it. I personally doubt that it has too much effect on power, at least not enough to warrant removing it if you think that you would ever drive it when it's below freezing.
AFSP1211: Personally, after living in ND, I would connect it. I remember a lot of days it wouldn't get over 0*. GM put it there for a reason, and they do a lot of cold weather testing to find these things out. With the plastic intake doing a lot to isolate the throttle body, I'd imagine it gets insanely cold running down the highway in 0* weather. (unlike the vortec/tbi setups where they get heat soaked from the intake)
Of course, if you park it in the garage all winter then it's a non-issue.
Venom: I take it you're running the trucks radiator and not a LS style? I don't know if you can plug the line on the head, but my guess would be that you can with no side effects. It really doesn't circulate much fluid, and the LS radiators it just goes back into the radiator.
If you want to heat the TB for winter, I would tap the t-stat housing as others have said to keep circulation. You could also get out a tape measure and figure out which LS style radiator you could fit and get one with all t
he correct fittings.