it is located on the back side of the frame rail on the drivers side about half way between the tires
The 2006 GMC Sierra 3500 SLE with the LBZ 6.6 Duramax does not have a cabin filter.
Look under the vehicle along the frame - follow the fuel line from the tank
Purchase a Purolator cabin filter for your truck, it comes with complete instructions.
Under the hood. It almost looks like an oil filter, only bigger, and should be mounted to a housing with a pump button on top. It should be on the passenger side of the engine.
in fuel tank
GMC Sierra, Silverado, Silverado 2500HD, Silverado 3500
Mounted on top and inside the fuel tank.
2008 GMC TRUCKS SIERRA 1500 PICKUP 4.3L 6-cylCAPACITIESEngine, with Wix Filter 57060.....4.6 quarts2008 GMC TRUCKS SIERRA 1500 - 2500 - 3500 PICKUP 4.8L-5.3L-6.0L 8-cylCAPACITIESEngine, with Wix Filter 57060.....6.0 quarts2008 GMC TRUCKS SIERRA 2500 - 3500 HD PICKUP 6.6L 8-cyl Engine Code 6 TurboDieselCAPACITIESEngine, with Wix Filter 57202....10.0 quartsHope This Helps.
The GMC Sierra 3500 truck was first created in 1998 for the 1999 release. The GMC Sierra 3500 version from 1999 to 2007 is considered the classic version.
The 1500 or 2500 trucks have a capacity of 26 or 34 gal. The 3500 will have a capacity of 50gal.
It wasn't built with one.
It is not a user-servicable fuel filter. It is located in the gas tank.