Will Freon leak without a cap?

Schrader core valves that are inside these service ports can leak, even with a schrader valve cap. A simple way how to tell if a schrader is leaking is to spray it with diluted dish soap. It’s not a guarantee you’ll see a leak for a couple of reasons.

How does the a / C work on a 1999 Silverado?

Start the engine, and set the A/C dash controls to maximum cooling and medium blower speed. Open the low side ( blue knob) service valve on the gauge set and allow the refrigerant to flow into the system. The A/C system on the Silverado holds 2.5 lbs. of refrigerant.

Is the a / C on my Silverado Sierra working?

I have a 2002 Silverado with a 5.3L engine. The A/C is not working and I want to check the pressure on both the low and high side, but can not find the low side port.

What kind of AC system does a Chevy Silverado have?

The 1999 Chevy Silverado comes equipped with an R134a system that can be serviced by the home mechanic with average skills and experience. This repair project does require the use of a vacuum pump and an A/C gauge set, which are specialized tools that are available at your local auto parts supplier and may be available for rent.

How do you recharge a 1999 Silverado AC system?

The ports are sized so that the gauge set cannot be installed improperly. Twist the knobs on the hose ends counter-clockwise to make sure they are released, and pull the quick disconnect ring to snap them into place on the service valves.

What was the problem with my Silverado air conditioner?

I have an ‘07 Silverado in the new body style and all of a sudden the a/c had stopped blowing cold. I took it to a valvoline instant oil change place that does a/c servicing and they said the high side valve was leaking, but they only had the low side in stock to replace.

I have a 2002 Silverado with a 5.3L engine. The A/C is not working and I want to check the pressure on both the low and high side, but can not find the low side port.