I was instally a CST kit on my 05 GMC D-Max when I noticed the front DIff had no breather on it, my 1997 IFS chevy has the same plastic insert with a hose and vent tube for the front diff. Are all the D-MAx the same or did GMC forget to put mine on???????

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05 GMC 2500 D-MAX CST 6-8 kit BFG 315-75-16 MUDDERS Magnflow exhaust without kitty predator power programmer65 setting,volant cold air intake, 7,777 miles and lovin it!!!!!!!!!!!!!!!!!!!!!!!!!!!

moving to Drivetrain section.

There is a hose connected to the plastic breather plug on my 2002 Chev. I believe it is fastened to the inside, driverside front wheel well liner.

it should have the hose connected..i have an 05 2500 4x4 and it has a blk hose connected to the plastic breather plub.

Mine has one, same as described above. Located on the drivers side, black plastic hose is mounted to inner drivers side inner fender.