need to change out the coolant, oil, etc and it wont open

It's GM. Try pushing down right by the hood ornament and it should open after a few tries.

if your talking about the lever inside the car, just get some needle nose pliers and pull the wire

is the cable broke is here stll a cable inside the car grab with vicegrips and pull if its broken under the hood it can be opened its hard to explain it but you neet to trip a lever that the cable useto hook to they put it into an almost impossible place to get to to prevent thiefs to do what you need to dopopping on the hood works if the hood cable is intact and the elease is sticking once hood is open spray it with lube