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Author Topic: Climate control  (Read 3531 times)

Offline st3vomettler

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Climate control
« on: March 22, 2017, 07:26:24 pm »
I inherited my dads 90 c1500 5.7 and ever since he bought the truck the digital climate control is always on with the key off and was wondering if anybody can help me figure out why
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77 c10 Silverado 350 nv3500 5spd

Offline Irish_Alley

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Re: Climate control
« Reply #1 on: March 23, 2017, 07:43:17 am »
you talking about the display is always on? like just the arrows pointing down?

i remember my moms truck having a similar issue but details are fuzzy. my (wifes) 94 doesnt have any issue. i didnt really drive my 89 that much but this issue doesnt ring a bell for it
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Offline st3vomettler

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Re: Climate control
« Reply #2 on: March 23, 2017, 09:05:43 am »
Yes the display is always on you can Hit the heat button and it will start working with the key being in your pocket
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77 c10 Silverado 350 nv3500 5spd

Offline VileZambonie

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Re: Climate control
« Reply #3 on: March 23, 2017, 12:57:34 pm »
This is not related to these trucks so questions like this belong in general discussion.
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Offline hatzie

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Re: Climate control
« Reply #4 on: March 23, 2017, 02:43:46 pm »
The Wiring, Unit Repair, and Service bulletin manuals for the 1990 GMT400 C1500 are here. 
https://www.mediafire.com/folder/b7hnp7aabn0jt/1990
I don't have the 1990 GMT400 service manual in my library.  You can use the 89 & 91 manuals to fill in the blanks.
https://www.mediafire.com/folder/a94x3mxehexw6/T400

You may do better asking this question on a GMT400 specific forum or sub-forum. 
http://www.gmt400.com/
http://67-72chevytrucks.com/vboard/forumdisplay.php?f=12
« Last Edit: March 23, 2017, 02:53:53 pm by hatzie »
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Offline st3vomettler

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Re: Climate control
« Reply #5 on: March 23, 2017, 04:14:50 pm »
Ok thank you
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77 c10 Silverado 350 nv3500 5spd
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