Your cart is empty.
Your cart is empty.ACDelco GM Original Equipment Heater Bypass Valves are control valves for the flow of coolant through the heater core. When the heater valve is closed, the bypass valve diverts the coolant flow back to the engine. The valve maintains coolant flow through the thermostat housing to ensure correct operation of the thermostat. This original equipment heater bypass valve is a GM-recommended replacement for your vehicle’s original components and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
Customer
Reviewed in the United States on January 5, 2025
Works great!
Fast Eddie
Reviewed in the United States on June 16, 2023
This is the part needed to delete the rear heat in a gmc safari or astro van(mine is a 1997). Mine had leaking rear lines to the rear heater core. The metal lines are discontinued. Repairing them is possible with patching in rubber hose but this fix is easier in my opinion. Original had a 6 port valve. Simply install this 4 port valve, remove the rear heat valve, plug the vacuum line from the rear heat valve and cap off the 2 rear hoses that go to rear core up front while your installing this. Purchasing a set of hose clamp pliers makes the job far more easy. Also they make 5/8 rubber caps for capping off the metal lines for a clean repair. I now have no more leaking coolant at the rear core where it enters the van and my front heat works far better than before. Be sure to check your vacuum lines going to this new valve and also don't forget to plug off the vacuum line that went to your rear heat valve that you removed. You will loose a little coolant and make a mess. Top off coolant after running and assuring there are no leaks.
D. Payne
Reviewed in the United States on April 9, 2020
I'm turning my van into a camper so the rear heater had to go. It pays to go with Delco original equipment. The hardest part was dealing with those factory hose clamps. Helpful if you have the right tool for that (which I didn't).
Pablo Ulloa Pena
Reviewed in the United States on December 7, 2019
Buena calidad....me gustó...justo lo que necesitaba.
Andrew
Reviewed in the United States on August 31, 2018
This part solved the coolant leak I was having with my '98 Astro Cargo van (without rear heat). The plastic on the old one had deteriorated after 20 years. Perfect replacement.
amneziak
Reviewed in the United States on May 7, 2018
double check yours! my vehicle has extra heating in the rear so i needed a similar one w/six hose connectors. good company, swapped mine out for the correct one no problem. fast shipping.
Rshopper
Reviewed in the United States on October 7, 2015
Replaced the original after fixing up the cooling system. New one has a small leak after 3 months. This is a fragile part made entirely out of plastic.
Ramon Morales
Reviewed in the United States on October 30, 2015
Excellent ACDELCO OEM GM part for heating and water distribution engine of a car. GOOD SHIPPING TIME AND EXCELENT PACKAGE.
Recommended Products
