Fog lights 03 gmc envoy slt not working. How can i located fuse without

I wonder if the Immobilizer is related to the door locks and the fuse blowing broke the pairing. Try the reset

https://www.google.com/search?q=2005+GMC+Envoy+SLT+reset+security

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In the sump. Connected to the oil feed tube.

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

on top of motor in front by where radiator hose is.

Well, the problem is that I dont know the reason, you should investigate. There could be issues with lamps (must get new) or electricity problems (must head to auto-service)

Check fuse --if blown -replace. Posibly wiring connector under seat unplugged.

vaccum actuator on the frontend is malfunctioning... check the electronic connection, as well as the vaccume hose running to it, if its cracked, or unhooked it wont engauge in 4 wd.. these actuators are terrible with this problem.. hope this helps you.

This most likely is a bad or incorrectly adjusted brake light switch. The brake light switch is located under the dash next to the brake pedal arm.

If I remember correctly if you look at the back side of the fuse cover, it should tell you what the fuses are. Also in the owners manual in the index, under fuses, it should give you a diagram of the fuse location for the acc. outlets. Good luck. The fuse should be a 20 or 25A fuse.