Basically a "tune up" in a car today simply is an oil change,air filter change and chassis lubrication. Checking all fluids,etc. If the car has less than 100,000 miles on it, it DOES NOT need spark plugs unless there is a problem with the way it runs. It should cost you no more than $300 and that would be with a radiator flush and new coolant.
Side Note: That is if you take it to a regular mechanic. If you take it to a dealer, expect to pay $500.
No, the 2007 is a different generation of Silverado than a 2000. The 2000 is a GMT-800 and the 2007 is a GMT-900 different platform and styling.
The 2007 Chevrolet Tahoe has 16 valves.
The 2007 Chevrolet Impala has a V6 engine.
The 2007 Chevrolet Suburban has a V8 engine.
The 2007 Chevrolet Colorado has 16 valves.
The 2007 Chevrolet Express has 16 valves.
The 2007 Chevrolet Equinox has a V6 engine.
The 2007 Chevrolet Suburban has 16 valves.
The 2007 Chevrolet Express has a V8 engine.
The 2007 Chevrolet Corvette has a V8 engine.
The 2007 Chevrolet Corvette has 16 valves.
The 2007 Chevrolet Equinox has 12 valves.