There is an access in the cover below the radiator for the filter.
where is the oil pump on a 1998 gmc jimmy in the oil pan.
Where is the oil filter on a 1999 gmc jimmy
on the driver's side, behind the headlight.
PH3980 if I recall
The oil filter is a screw on type. It is mounted on the side of the engine close to the front.
under the truck in front behind a door in the "skidplate" Its marked Oil Filter
4 and one half quarts.
near the front differential
Look for an access panel beneath the rad.
It's in a plastic trap door in between the the radiator and the oil drain pan.
Anyplace that sells oil filters can tell you the correct size to buy. I would recommend AC/Delco, Purolator, Bosch, or Wix filter for your GMC.
where is the oil sensor on a 97 gmc jimmy