Where is the heater control valve?

2003 GMC SAVANA
156,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
Avatar
LEMPHUNTER56
  • MEMBER
  • 3 POSTS
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.
Image (Click to enlarge)
Attached Media
Oct 28, 2020 at 8:00 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
KASEKENNY
  • CAR REPAIR CONTRIBUTOR
  • 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
Images (Click to enlarge)
Attached Media
Attached Media
Oct 28, 2020 at 12:39 PM
Advertisement
Avatar
LEMPHUNTER56
  • MEMBER
  • 3 POSTS
I couldn't find these diagrams anywhere on the internet. This is what I needed. Thank you sir!
Oct 29, 2020 at 7:35 AM
Avatar
KASEKENNY
  • CAR REPAIR CONTRIBUTOR
  • 18,907 POSTS
You are welcome. Please come back to 2CarPros next time you need some help. Thanks
Oct 29, 2020 at 5:42 PM