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Where is the heater control valve?

Tiny
LEMPHUNTER56
  • MEMBER
  • 2003 GMC SAVANA
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 156,000 MILES
Having trouble locating the HCV for the van listed above 1500. Can't find any diagrams anywhere on the internet. Also I am seeing 2 port and 4 port HCV that say they both fit my van. Is that possible?

Thanks.
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Wednesday, October 28th, 2020 AT 8:00 AM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Here are the instructions from the manual on this bypass valve. I am not sure where the 4 port valve would come in unless there is a rear system that is separate and they run it from the same coolant source.

Let us know if you need more info and we can dig further. Thanks
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Wednesday, October 28th, 2020 AT 12:39 PM
Tiny
LEMPHUNTER56
  • MEMBER
  • 3 POSTS
I couldn't find these diagrams anywhere on the internet. This is what I needed. Thank you sir!
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Thursday, October 29th, 2020 AT 7:35 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
You are welcome. Please come back to 2CarPros next time you need some help. Thanks
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Thursday, October 29th, 2020 AT 5:42 PM

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