What did you do to your NBS GMT800 Tahoe/Yukon Today?

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DenaliReyes

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I'm replacing the radiator today. After driving with all new gaskets and thermostat. I guess the radiator was the next thing to go. Maybe the preassure along with the 90 degree heat killed it.

Question:
Should my radiator fan turn on ASAP after engaging the AC to the coldest/recirculate setting?
I noticed some videos saying it will turn on as soon as the ac is. Idk.

I just replaced 2 of the 3 fan relays.

Temperature gauge stays under 200 degrees.
 

Rocket Man

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I'm replacing the radiator today. After driving with all new gaskets and thermostat. I guess the radiator was the next thing to go. Maybe the preassure along with the 90 degree heat killed it.

Question:
Should my radiator fan turn on ASAP after engaging the AC to the coldest/recirculate setting?
I noticed some videos saying it will turn on as soon as the ac is. Idk.

I just replaced 2 of the 3 fan relays.

Temperature gauge stays under 200 degrees.
Yes your fan should turn on at the same time your compressor does, as soon as you turn on the AC and the snowflake illuminates.
 

DenaliReyes

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Yes your fan should turn on at the same time your compressor does, as soon as you turn on the AC and the snowflake illuminates.
Then something is up.
I managed to replace the radiator. Tomorrow will check on the fans. They turned on after I replaced the radiator and turned the heat all the way up to get the juices flowing. But I didnt see neither turn on after I switched to the coldest settings.
 

Rocket Man

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Then something is up.
I managed to replace the radiator. Tomorrow will check on the fans. They turned on after I replaced the radiator and turned the heat all the way up to get the juices flowing. But I didnt see neither turn on after I switched to the coldest settings.
Is your AC turning on, does the snowflake in the control head turn on, or does it flash 3 times and go out?
 

DenaliReyes

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The AC turns on, the snowflake turns on. But right now it is blowing hot air. That might be another problem.
I'm looking up other posts and will have to look into the temperature sensing unit. The harness was brittle and broke off. I wired a new tail for it. But didnt change the unit. Might be bad.
 

Rocket Man

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The AC turns on, the snowflake turns on. But right now it is blowing hot air. That might be another problem.
I'm looking up other posts and will have to look into the temperature sensing unit. The harness was brittle and broke off. I wired a new tail for it. But didnt change the unit. Might be bad.
The fans turn on when the compressor turns on so check to see if its coming on.
 

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