It can mean all kinds of things. My service engine soon light recently came on and it appears to be that I am either in need of a tune up or I am in need of an ignition coil replacement. In any case, giving the car a tune up at regular intervals (2 years) would have probably saved me this headache. If you take your car into a local AutoZone store, they should be able to give you a print out of what is wrong with the van. It will usually read out codes from the computer stating diagnostic information, which should aid you in determing the cause of the "Service Engine Soon" light. It might be a $15 fix or it could be a $1500 fix, but there is no way of knowing unless you have a dealer or repair shop read the computer for you.
the 2002 Pontiac Montana came with a 3.4L engine.
how do you change a battery on a 2002 Pontiac Montana
Where is the heater core for a 2002 pontiac montana
Good Chance this is caused by a faulty O2 Sensor. I had the engine light stuck on in my 2002 Montana and replaced rear O2 sensor and it turned it off.
2002 Montana Seat Repair
Where
How to disengage Pontiac Montana 2002 anti-theft system
2002 Montana holds 4.25 Litres including the oil filter.
p215/70R15
Pontiac does not use inertia/reset switches.
you cant
The gas tank in my extended 2000 Pontiac Montana is 25 gallons. I would imagine the 02 is the same.