This is probably a dumb question, so apologies
all around.

Have changed oil many times on 3 different vehicles,
but my 03 sierra doesn't want to cooperate.

I've checked 3 different bolts which I think should be
the oil plug, but they're all so very very tight.

(Like "cant get it off by hand" tight).

Has anyone had this problem?

I could just be looking at the wrong bolt, anyone
know exactly where it is?

2003 gmc sierra v6

Thanks in advance!

Guess your talking about the engine oil right? If so, it should be on the oil pan, the lowest bolt there. You have to use a wrench to loosen these up.

Thanks DEEPEE.

I'm probably looking in the wrong place.

I will look again and post it if it's in
a non-obvious place.