2007 CHEVROLET COLORADO INLINE 5 CYLN SMELLS LIKE GAS WHEN PARKED

https://justgivemethedamnmanual.com/chevrolet/2007-chevrolet-colorado-owners-manual/
https://www.manualslib.com/manual/945978/Chevrolet-2007-Colorado.html

The part numbers for the frames are different, which could be just where different bolts mount. the parking brake cables for extended cab and 4 door are the same which leads me to believe that the wheel bases are the same. Your best bet would be to contact a salvage yard in your area and check with them.

Usually if you smell gas in the cabin the odor is coming in thru the vents from the engine compartment. Is there a fuel leak around the engine or the vapor canister ?

gauge is worn out. its the little motor behind the gauge needs replaced its called a stepper motor.. can be found on ebay motors.

put gas line antifreeze.

Common on Chevy products, known as key in circuit failure, what it means even if you take out the key the ignition remains on and drains the battery

Turn the key to the on position a then press the gas pedal three times within 5 seconds,the oil life light should flash 5 times then go out,then the oil life will be reset[the reset procedure is in the owners manual if this doesn't work].

6 qts. including filter.

usually around 30,000 miles or more frequently if vehicle is towing things.

This is the 3.5L inline 5 cylinder engine. The spark plugs are at the top of the engine. They are covered by a hunk of plastic called the "Air Intake Resonator".  Remove the plastic. Carefully pull the ignition coils from the spark plugs. Unlike most other cars. The Colorado has a coil on every plug.  This boosts ignition power, but, every coil is expensive. Do not harm them.