How do i get the spare tire from the bottom of the vehicle 2005 gmc envoy xl slt

In the sump. Connected to the oil feed tube.

Shane, Base 235 75R16, SLE, SLT, XL SLE, XL SLT P245 65R17,
Denali, XL Denali P245 60R18. Check the attached links,instruction and guides, Good luck
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GMC Envoy Tire Sizes
2006 GMC Envoy Tire Sizes
Tires for my Envoy Denali Recomendations

on top of motor in the back

This is normal. All vehicles idle high at start up to get the engine to operating temperature. This is known as open loop. The computer ignores signals from O2 sensors to keep your engine running safely. Once it has warmed up, it will enter closed loop, and you will see a decrease in idle.

Rad fan or heater fan??

Fix your car right away by clicking the link I attached
GMC Envoy 2002 to 2009 Service Workshop Repair manual

It is possibly the fan clutch.

contact the dealership where you purchased the vehicle

if it cant be lowered, the mechanism is bad or siezed. you will need to cut the cable and then replace the mechanism.

Go underneath the SUV and find the Fuel tank. from their find the gas line that runs to your engine. follow that line and eventually you will come across a circular piece attach to the line. Thats youre filter.