possible low oil pressure? 1984 6.2l

[exmilitary6.2]

Hello again my 1984 6.2l blazer oil light flashes at idle......Its full of oil and i will be changing it tonight. It only has 39000 original miles. could the oil pump be weak already?
thanks
kyle

[76m880]

you need to check it with a mechanical gauge becuse the stock ones have all sorts of issues

[exmilitary6.2]

ok i did and everything seems ok. I didnt think i could trust that light......
Thanks alot
kyle