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Where is the AC low side service port on a 2003 Pontiac Montana?
Wiki User
∙ 11y ago
Under hood between the heat shield of the exhaust manifold and the radiator fans. Mine had a blue cap with a large L on the top but if there was an after market cap installed it may black. I would recommend attaching the hose with a cold engine, key off making sure the R134a refill product you use has a long enough hose to reach above the radiator and wear heat resistant gloves because there isn't much room between the manifold and radiator fans. Touching or putting fingers in either of these is not recommended. =)
Wiki User
∙ 11y ago
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