Thanks for your response. So, in theory I could replace the high and low ports (which is where I THINK the leak is coming from) and then pull a vacuum, before replacing the accumulator, to check for any other leaks? And if it holds the vacuum, then I can replace accumulator and pressure switch...
Hi guys, my first post here. Reddit has been helpful on previous issues, but google has often led me here when researching other repairs.
2003 Yukon XL 6.0 Denali.
Has about 175k miles (original owners didn't drive it daily) and I've had it about 4 years. It did have to have the transmission...
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