08 sierra grill block

[aerohead]

Originally Posted by gotmehooked

well went for my first drive with the block on, and going up hills the truck seemed like it lacked power. tranny temp was also climbing to 170 degrees. Pulled over removed the block for the rest of the ride, and temp steadied around 145 degrees. Any suggestions? Would cutting some slits in it still provide an aerodynamic advantage or is a truck to big to have critical airflow blocked.

170-degrees is a good temp for the tranny.You might record your ambient temps on the days you test and build up a database for your rig.
Racers try to pre-warm all their lubes before the race to get everything to equilibrium temp and minimum viscosity to extend their range between pit stops.

[gotmehooked]

Originally Posted by Flakbadger

GotMeHooked, do you have this grille?
http://image.trucktrend.com/f/937887...ont_grille.jpg
If so, just block off a few of the bars (like, the outer 1/3rd on both sides, and the top and bottom all the way across.)?
If not, then I'm probably not all that helpful

I do have that grille. My air intake is by the passenger wheel well, and trans cooler is right in front behind grill.

[Sporty Modder]

Personally I would block off everything except a 3x4" slot in front of the trans cooler.