Windshield steam up after it sits awhile when colder wheather starts from when I bought new we are told they all do it by g m c I never beleaved them.

Check ground and ign switch. GM has had big probs with their IGN switches

If you're comfy with manuals then i know few websites that can help you with it. Bcause I've bought it from various websites so I know how each site deals. try www.reliable-store.com Very helpful

There is a check valve inside the fuel pressure regulator that can leak off the necessary fuel pressure to start the engine quickly. Have it tested or just replace it.

Check the electronics,cam sensor or crank sensor these are the culprits.

Sounds like you have bad gas. Gas goes bad after a couple months of sitting. I've gone through plenty of other options when trying to figure out this same problem, and it turned out to be the easiest problem of having old gas. Try running fresh gas straight into the fuel pump and see if it turns over then.

Try changing your fuel filter

If you are loosing coolant and you see water under the car after sitting you have a leak. The most likely area is the heater core as you are getting steam inside the car. If you smell anti freeze that is another confirming item. Check all the hoses and connections first before replacing the core. Good luck.

the valve lash is adjustable on your car, i would start with a tune up and valve adjustment.

i had a toyota 4 runner with same problem,windshield had small leak and was getting onboard computer wet. does your windshield leak? believe it or not,a new windshield did solve the problem!

most of these windshield wiper motors are located right below the windsheld and above hood. you probably have to undo the louvers where the windshield wiper arms are located and it sits in front of the driver side not too bad to swap yourself part itself is about $60 w/old motor turned in