Try resetting the alternator, if that doesn't work try changing the battery
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SOURCE: how to reset the "service engine soon" light on a 2001 pontiac grand prix gt
you can go to advance auto and use there scanner for free to clear the code its called an obd2 connection or when you disconnect your battery you can touch your black negative cable to your red positive cable that connects to the battery and it will completley drain everything and reset but warning you if your trying to get the car through emissions your gonna have to drive the car 50 or 100 miles after you disconnect the battery each time..
SOURCE: SYSTEM CHARGING FAILURE comes on briefly
take it too a auto store they will check the charging system for ya for free.
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: 2001 Pontiac Grand Prix Gt not shifting into OD
Basic Troubleshooting:
Although the Indicator says the vehicle is in "D" or "OD", is it really? If the linkage is mechanical, you may actually be in "3". Make sure the car is in neutral and pull the lever into the first forward position without looking at the indicator.
Does your vehicle have a switch to turn the OD off and you didn't know it? You may have inadvertently done this. In this case, though, usually there is a little dummy light on the dash that says "O/D off" or something like that.
Check the transmission fluid level on your vehicle and make sure it is to factory specification.
SOURCE: abs and traction control light faults after a brake job. 2005 Pontiac grand prix
You have a bad sensor at one of the tires that need replacing that operates ABS and traction control. If you take it in to a shop it will run $130 but they can find which sensor is causing the problem. But if you do it you might have to replace all 4 sensors to make sure you got the right one. Every hard to diagnoses. Its better for the shop cause they can get electrical read outs for each sensor.
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