My 97 Chevy Tahoe has been shaking.

What is your question?

When I drive in the morning and get to my first stop it starts shaking. My mechanic has fixed the spark plugs, my misfires, and my engine distributor and my check engine light is still blinking. Could it be a cracked intake manifold? Or are there any other possible causes?

What makes this problem better or worse?

Better after the vehicle gets hot. All gauges are normal.

How long has your 1997 Chevrolet Blazer had this problem?

A few weeks.