OBD port connector ? Under the steering column area left or right of the column .
SOURCE: 2002 Pontiac Grand Prix Thermostat
as you face the engine the thermostat bell is on the right (drivers side) Follow the radiatoe hose. Remove the two bolts and raise the bell still attatched to the hose. the thermostat is there with the rubber seal. You can gently pry the thermostat out with a screwdriver or something similar. Put in new thermostat be sure it is the same as the old one, and then replace or change the seal (be sure it is the smae size and thickness as the old one as I got the wrong size from Napa) Then replace the bell, and tighten, but not over tighten. I hope this helps!
SOURCE: 2002 grand prix runs rough,dies service engine
sounds like you have a vacuum leak, check all the vacuum hoses and replace any broken or kinked ones, also check around the intake manifold gasket for leaks. any air leaks after the air flow meter creates 'un-metered' air which inturn will make the car run rough and stall, hope this helps
SOURCE: Location of mass air flow sensor, 2000 Grand Prix GTP
Hi:
The mass air flow sensor is a round sensor that is mounted in the air intake, between the air cleaner box and the engine throttle body.
SOURCE: oil capacity of 2002 grand prix
Right around 4 3/4 quarts. Use an AC Delco filter. There is a difference and this will prevent low oil pressure.
SOURCE: where is the resistor switch
the blower motor resistor is located on the passenger side air box . you will need to remove the lower panel under the dash to gain access to the resistor . it is in the very back of the air box assembly near the fire wall . It is held in with two screws , you will need a 5.5mm or a 7mm socket (1/4 inch ) and short ext . the socket should be a swivel type .
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