Decode how exactly? You can take your car to AutoZone and they check codes for free, then they can recommend or tell you what shops are in the area.
Disconnect (both) battery cables, wait 30 minutes, and re-connect battery cables.
You can easily get all of the color codes for every wire on the 1998 Pontiac Grand Prix. Pontiac has an official website homepage that has all the information on it.
with a scan tool
The Pontiac Grand Prix goes by the GM Factory Wire Harness Color Codes. http://www.installdr.com/harnesses/GM-Wiring.pdf
You can't manually get the check engine light to give you the trouble codes on your vehicle. 1995 and later vehicles use the OBDII system and you must use a scanner tool to retrieve the codes. You can go to AutoZone or similar auto parts store that offers free scans to get the trouble codes retrieved. Or you can buy your own scan tool for about $70.
The related link below gives the trouble codes for a 1995 grand voyager.
whats the dealers code to un lock the radio
To reset the computer on a Pontiac Grand Prix SE, you can disconnect the negative battery cable for about 10-15 minutes. This will clear any stored trouble codes and reset the computer. Afterward, reconnect the battery cable and start the vehicle, allowing it to idle for a few minutes to recalibrate the system. If you have specific error codes, it's advisable to address those issues first before resetting.
The ABS light on a 2004 Pontiac Grand Am can be reset by connecting an OBDII code reader to the vehicle's computer. It can reset all codes and determine their cause.
it should, i do not think GM dealers have a separate scan tool for the Toyota, I mean Pontiac Vibe
The diagnostic port on a 2003 Pontiac Grand Am is located under the dashboard on the driver's side. Specifically, it can be found near the steering column, just above the brake pedal. You may need to remove a small cover to access it. This port is used for connecting an OBD-II scanner to read diagnostic trouble codes from the vehicle's computer.
You have to find the clues or pieces of the code.