Your cart is empty.
Your cart is empty.The Astro Pneumatic 7858541 No. 41 Radiator Test Cap for Late GM and Ford works with the Astro Pneumatic 78585 Universal Radiator Pressure Tester and Vacuum Type Cooling System Kit. This cap is necessary for testing the cooling system on both late model GM and Ford vehicles.
Brandon
August 23, 2025
Unfortunately the coolant pressure test kit I purchased did not have the right cap for my truck (2006 GMC 2500HD). This cap fits perfectly & keeps the pressure.I’m trying to find a mystery coolant leak.
AP
July 9, 2025
This worked for my 2012 Chevy Cruze.
Canvas Buttercup
July 8, 2025
I used this on a 1995 Saturn SC2 to check cooling system integrity.Connects snugly to the Astro Pneumatic compressor driven adjustable pressure manifold.Can't test the cap as it replaces the cap but does what it's designed for.And can be purchased as a single cap or as part of a set. Most DIYers don't need a full set.
Mason K.
July 7, 2025
Works as intended with the astro kit.
william
June 27, 2025
Should have been in master kit from Astro I bought for $230 but No they make you buy three for the empty slots in kit .
George
June 23, 2025
This fit perfectly on my 2006 Chevrolet Silverado Duramax.
Rudy
June 12, 2025
This fit my 2005 Ford F150. It's exactly what I was looking for. I tried everything else I could find on the Internet but they didn't fit. So if you have a 2005 F150 4x4 Lariat, this will fit.
Richard Cowtails
May 27, 2025
Bought to complete my set
Carlos Mendoza
March 21, 2025
Es un buen producto lo probé en un spark que es de gm y entro perfecto estoy seguro que en Sonic,Trax y esos carros entra sin problema, preferible engrasen las gomas para que selle mejor
Etienne Gallant
March 19, 2025
Simply a perfect match for pressure testing late Ford’s with 3.5 and 3.7 V6 engines. A must to avoid condemning the water pump when it’s not your issue. No leaks and feels solid. Made with heavy gauge plastic and corrosion resistant metal quick connect. Works great with Astro pneumatic cooling system pressure tester.
LUBELN
February 5, 2025
perfect
Recommended Products
