Vacuum Selector Valve search

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Detroit Diesel

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Joined
Apr 8, 2021
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Location
WA
First Name
Don
Truck Year
1986
Truck Model
K20
Engine Size
6.2
Hello. I have an '86 Silverado with a leaking HVAC vacuum selector valve. I dismantled it to see if it was repairable and it appears that the plastic backing plate is cupped with age. So I cleaned and reassembled it and it's still sucking in air. It also now has a broken retainer tab :)
I've been searching online for a new one and everywhere I look they're out of stock. Anyone know where I might be able to buy a NOS or aftermarket one of these?

ACDelco 15-17220
GM 16037769

https://lt-truck-gmc.7zap.com/en/k25+k2500/49204-1986/0-0-1595538091/0-1623686518-0-0/#6
 

Craig 85

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Nashville, TN
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Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205

Detroit Diesel

Junior Member
Joined
Apr 8, 2021
Posts
2
Reaction score
3
Location
WA
First Name
Don
Truck Year
1986
Truck Model
K20
Engine Size
6.2
Thanks Craig. I looked at buying the whole HVAC control assembly as well but as rest of the assembly is in great shape I really wanted to get just the valve.
I ended up buying a reconditioned valve (15-71032/16037768) from Tom at [email protected] for $29.
http://thepartguy.com/ac-controls-chevytruck.htm
Turns out it's the same part as the original ACDelco 15-17220/GM 16037769. Not really sure why they are coded differently. I even disassembled both it and the original to verify the vacuum channels in the rubber seal are an exact match. They are.
I installed it over the weekend at it works great.
 

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