Why did the Service Vehicle soon light comes on my Pontiac Grand Am 2000?

spiralout1185

New member
Greetings, My "Service Vehicle Soon" light has come on (only in the morning really). I have one headlight out and my change oil light came on right after I got a fresh oil change...the oil change was a few months ago, and I'm due for a new one but the REAL issue is my heat is barely working, making it hard to warm up my car in this terrible cold weather. I checked the coolant and its completely full.

I was told that my Service Vehicle light is from the headlight out and the low heat is from a bad thermostat....

Suggestions?
 
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