210 is normal for idling and AC on...
I would think that is normal for the most part with the age of the truck. You figure GM tests in the extreme heat I would think idling for hours on end to make sure they can handle the life out on the road in the hands of the public. I know they have heavy duty cooling systems but look at the law enforcement vehicles that idle all day in extreme heat.
I would check to make sure the radiatior is clean and air can flow through all of the surface area. Little bugs can clog it up over time.
Those all have electric fans too.I'm seriously thinking about adding E-fans to mine. Justin said he set up everything to turn them on when he did the tune. All I'd have to do is get the fan and buy the custom plug in harness from Blackbear and its pretty much plug and play. I've been thinking about this more and more because I notice my AC will blow "cool" when my truck is idling, but blow "cold" once I really get the truck moving.
Thanks guys what about the radiator that I listed what do you think of it? Also my stat is a 160' due to my Hypertech chip so when I see 210 im like watch out. I also have a electric fan in my garage I think it's from a 240Z I might just install in just to help with this summer heat.
I going to start saving my coins for the new radiator since my tanks are plastic and it's 17 years old. I do have a new flex-fan and spacer in my garage but I wanted to keep it OEM with the HD fan clutch. Who thinks a direct fan set up would be better? Getting back to the electric fan I just can't run a hot wire and ground to it right don't I need to buy a electric fan kit for the relay?
Thanks again! GMC![]()

Thanks guys what about the radiator that I listed what do you think of it? Also my stat is a 160' due to my Hypertech chip so when I see 210 im like watch out. I also have a electric fan in my garage I think it's from a 240Z I might just install in just to help with this summer heat.
I going to start saving my coins for the new radiator since my tanks are plastic and it's 17 years old. I do have a new flex-fan and spacer in my garage but I wanted to keep it OEM with the HD fan clutch. Who thinks a direct fan set up would be better? Getting back to the electric fan I just can't run a hot wire and ground to it right don't I need to buy a electric fan kit for the relay?
Thanks again! GMC![]()
Not trying to rain on your parade...but...
The radiator in your link .. in the first post...is a "SINGLE CORE" radiator...
If it was me..and I was spending the money for a new radiator...I would want at least "2" cores...maybe more.
Two or even three cores don't cost "ALL THAT MUCH" more than a single core.
Then you would have much more "RESERVE COOLING CAPACITY" to the the entire system.
Ans, as for the original question about hitting 210... Thats really no big deal.
And one other thing to remember...when idling...the AC compressor is turning "REALLY SLOW"
That may be why it is only blowing "COOL" when idling.
My 2006 Chevy does the same thing...from day 1 when I bought it new.
I can mash the gas a little bit when idling to bring the RPM up a bit...and the AC cools better.
The A/C in my truck is so cold, you can cut glass with your nipples.![]()


The A/C in my truck is so cold, you can cut glass with your nipples.![]()
Yeah...but let it idle in 95 to 100 degree weather for a little while...
It may be a little different then...
![]()

Thanks guys what about the radiator that I listed what do you think of it? Also my stat is a 160' due to my Hypertech chip so when I see 210 im like watch out. I also have a electric fan in my garage I think it's from a 240Z I might just install in just to help with this summer heat.
I going to start saving my coins for the new radiator since my tanks are plastic and it's 17 years old. I do have a new flex-fan and spacer in my garage but I wanted to keep it OEM with the HD fan clutch. Who thinks a direct fan set up would be better? Getting back to the electric fan I just can't run a hot wire and ground to it right don't I need to buy a electric fan kit for the relay?
Thanks again! GMC![]()
Not trying to rain on your parade...but...
The radiator in your link .. in the first post...is a "SINGLE CORE" radiator...
If it was me..and I was spending the money for a new radiator...I would want at least "2" cores...maybe more.
Two or even three cores don't cost "ALL THAT MUCH" more than a single core.
Then you would have much more "RESERVE COOLING CAPACITY" to the the entire system.
Ans, as for the original question about hitting 210... Thats really no big deal.
And one other thing to remember...when idling...the AC compressor is turning "REALLY SLOW"
That may be why it is only blowing "COOL" when idling.
My 2006 Chevy does the same thing...from day 1 when I bought it new.
I can mash the gas a little bit when idling to bring the RPM up a bit...and the AC cools better.
