exactly the reason this was created. you'd be surprised how many people are missing one or both!!!
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04-24-2008
exactly the reason this was created. you'd be surprised how many people are missing one or both!!!
04-27-2008
My buick didnt have the upper one and from what i see they dont come with them. I had broken the lower air deflector and had taken it off. I had made a radiator plate out of stainless and made a lower pan to smooth the air out from the radiator to the frame. That had made a 15 degree drop at least. This was on a 95 degree day. As of lately it has actually dropped more adn the car runs much better. Its amazing how such a small thing can make a huge difference.
05-25-2008
Nice writeup and good pics.
My '98 was missing that upper baffle when I bought it. Those of us with '97-'98 GPs can utilize some of the cooling improvements that were added to '99s.
Instead of that upper baffle, the newer GPs got ducts that go directly behind the grilles and direct air into the radiator. The part numbers are 10423209 (Right) and 10423210 (Left). I added them to my '98 and they fit perfect. Those ducts and the upper baffle are mutually exclusive however.
The lower baffle was redesigned in '00 according to the parts list. The new lower baffle part number is 10423208. I haven't tried using it and I believe it is not a simple bolt on as it requires a little work to attach properly. I plan on getting one installed at some point though.
The most important upgrade is the newer fans that were added in '99. They are shrouded and are supposedly ~30% more efficient than the older fans. I got mine from Ed Morad for a really good price. They will bolt right in although I had to do a lot of wrestling with large wiring harnesses before it would fall into place. Make sure you remove the plastic tranny cooler line holder from the bottom of the radiator support before putting the new fans into place.
Comparison pic of the two different fan styles:
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