headgasket blown on 1998 Pontiac Bonneville

Do I have to unbolt the tranny from the motor to get to the head gasket

Asked by for the 1998 Pontiac Bonneville
ck upper intake first they are bad about burn a hole thur intakewhere the egr valve come up thur intake, i have had both my cars intake go out
K thanks Buddy I will try that tomorrow I;m just starting so I'm sure i will have other ?s