Pcm Adjustments for Electric Fans - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-11-2015, 09:29 PM   #1
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Default Pcm Adjustments for Electric Fans

Hey guys can the coolant temp be adjusted to 200 degrees in any way through tge pcm or changing something. Its a 95 ssei bonneville, i just think the fans kick on at 210-220 and i think its to hot. Any suggestions thanks.
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Old 04-11-2015, 09:34 PM   #2
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Low speed fans kick on at 212, high speed at 226.

From the factory, you have a 195 thermostat. A tad warm IMO for summer time. I use a 180 in the summer and back to 195 in the winter.

I think you can send your PCM to have it reprogrammed, but not really worth it.

Either way, you will be fine.
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Old 04-11-2015, 09:38 PM   #3
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A fan override may be a good move if you are concerned about it. The only time it should be using the fans is when the A/C is running, or stop and go.

Is it Supercharged, or NA? Also, 210-220 is exactly as designed, and there is absolutely nothing to worry about. NA would see no benefit from lower temps, and */C would only use it to hold off heatsoak as long as possible under extreme conditions (racing), but when they do it, it'* with a fan override.

What are your concerns, and what are you hoping to gain?
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Old 04-11-2015, 09:41 PM   #4
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Sorry, I missed it was an SSEi. It'* a 1995, and I don't even know if anyone even flashes those anymore.
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Old 04-12-2015, 01:19 AM   #5
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Thanks Mike! I'm just trying to get optimal performance and also working on cooling down trans fluid. I put a post about trans problem which I'll post again since I didnt see it.
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Old 04-12-2015, 10:37 AM   #6
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Let'* keep this to one issue at a time please. If you have trans questions, please start another thread. This is to prevent confusion in threads.
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