Hey,
I've have purchased and tried 2 different types of vacuum pumps to change the oil on my 3gm30f, and i can not get the vac hose into the dipstick port. I tried going to home depot to find a smaller diameter piece of tubing but there's nothing smaller to buy. So for anyone out there that has this engine, can you please tell me which pump you purchased that fits. Thanks in advance.
Michael