just bought used 2007 gmc sierra. got oil changed immediately. on drive home noticed oil pressure gauge was pegged all the way to right 80 psi, should i be concerned?

What is your question?

just bought vehicle. has 111,000 miles on it. saw problem on way home from dealer. i know nothing about vehicles

What makes this problem better or worse?

gauge doesnt change except when i turn engine off

How long has your 2007 GMC Sierra 1500 had this problem?

just bought today.