It should be the valve located on the condensor. The charger should only fit one valve. You can pick up a kit a your local parts store.
It is probably low on freon.
side of the throttle body to your right facing the engine
in the low side hose by the condenser
1996 Chevy blazer timing chain
1lb.14ounces of freon 134 and 3 ounces of ester oil
my Chevy blazer power seat on my 1996 Chevy blazer isn't working
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A 1996 Chevy Blazer Does have a transfer case IF it is equipped with 4 wheel drive
What is your 1996 Chevy blazer LS with a blown motor worth?".
Aprox 30 oz.
The 96 Chevy Blazer does not have a timing belt.