is oil supposed to go through this tube? my 2007 acadia has oil in this tube

Yes it’s part of the pcv system google it. Just relieves pressure from the crank case. Blow it out with an air hose or clean it with soap and water if not damaged and just blow thru it. I cleaned this hose and the intake breather and throttle body every 20k or so and never had any gasket issues with our Acadia

is oil supposed to go through this tube? my 2007 acadia has oil in this tube

No but it's a design problem with the Acadia and outlooks

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⚙️ Upgrade your ride with GM’s precision-crafted PCV tube — because your engine deserves the best!

DUAL BARB CONNECTIONS - 0.32-inch inlet and outlet barb fittings guarantee secure, leak-free ventilation.
LIGHTWEIGHT YET DURABLE - At just 0.01 ounces, this PCV tube offers strength without adding bulk to your engine setup.
PROUDLY MADE IN THE USA - Support quality and reliability with a product manufactured domestically.
PRECISION ENGINEERED FOR PERFORMANCE - Crafted to meet exact GM OEM standards ensuring flawless compatibility and durability.
COMPACT DESIGN FOR SEAMLESS INSTALLATION - 7.6 x 4 x 1.1 inches dimensions fit perfectly in tight engine compartments.

The ACDelco GM Genuine Parts 12594578 PCV Tube is a compact, lightweight, and OEM-certified ventilation component designed to optimize engine performance. Manufactured in the USA with machined exterior finish and dual 0.32-inch barb connections, it ensures a secure fit and reliable crankcase ventilation for GM vehicles.

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Material	pcv
Brand	GM
Item dimensions L x W x H	7.6 x 4 x 1.1 inches
Exterior Finish	Machined
Inlet Connection Size	0.32 Inches
Inlet Connection Type	Barb
Outlet Connection Type	Barb
Number of Ports	2
Outlet Connection Size	0.32 Inches
Specification Met	OEM (GM)
Global Trade Identification Number	00808709948735
Manufacturer	ACDelco
UPC	808709948735
Model	GM Original Equipment
Item Weight	0.01 ounces
Product Dimensions	7.6 x 4 x 1.1 inches
Item model number	12594578
Manufacturer Part Number	12594578

ACDelco GM Genuine Parts 12594578 Positive Crankcase Ventilation (PCV) Tube, Black

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