If you just open the drivers door and look at the door frame you will see a sticker with all the information you need
The oil pressure sensing unit is right above the oil filter on the front of the 4.7L 2001 Grand Cherokee.
The 2009 Jeep Grand-Cherokee has 59.1 in. of front shoulder room.
The 2004 Jeep Grand-Cherokee has 56.5 in. of front hip room.
The 2011 Jeep Grand-Cherokee has 58.6 in. of front shoulder room.
The 2012 Jeep Grand-Cherokee has 40.3 in. of front leg room.
The 2009 Jeep Grand-Cherokee has 41.7 in. of front leg room.
The 2007 Jeep Grand-Cherokee has 59.1 in. of front shoulder room.
The 2010 Jeep Grand-Cherokee has 39.7 in. of front head room.
The 2012 Jeep Grand-Cherokee has 39.9 in. of front head room.
The 2006 Jeep Grand-Cherokee has 41.7 in. of front leg room.
The 2004 Jeep Grand-Cherokee has 39.7 in. of front head room.
The 2007 Jeep Grand-Cherokee has 57.1 in. of front hip room.