2008 Pontiac G5 - Answered Questions & Fixed issues

This is easy. Get a friend, you need a little help. grab hold of the bottom seat by slipping your hands in the crease. Lift it up. The seat will lift up towards you. There are some clips on the bottom. of the seat, slide the seat off the clips and take the seat out of the car. Most backs have bolts holding the back in place. Undo the bolts, and lift the seat off the top clips,, and remove from the car. Goes back the way it came out.

check fuses first, cab and bayif all goodscan the PCM . or get it scanned.

Question edited for clarity. Question moved from 'Speed Computers', to Pontiac G5. The way to find which item is faulty is easy. Clear the code Move the plug from cylinder 2 and put it in cylinder 4. Run the car. Is the misfire still on 2 or has it moved to 4. Yes? the plug is faulty. No? Next test. Clear the code Move the coil pack from cylinder 2 and put it in cylinder 4. Run the car. Is the misfire still on 2 or has it moved to 4. Yes? the coil pack is faulty. No? Next test. Same test for the injector. If the misfire remains on 2 you need an auto-electrician with a pro grade scan tool computer which analyses every sensor and every module.

The dash won't work with the battery disconnected

Your dealer is full of it and you should stop using that AH. Get yourself another dealer that is competent and worthy of your business. No car should operate the way yours is. You appear to have either a fuel delivery problem or an erratic ignition causing the issue.

Lock and unlock the drivers door with the door key. This resets the security system.

On this website (link below) you find fuse box diagram and description for Pontiac G5 (2008) Pontiac G5 2008 fuse box diagram Auto Genius

To fix your problem Fix what they ripped out first. You can get the key/lockset and ignition switch at parts stores. Fix wiring also if needed. After it is back to normal. Do a relearn for the key. Put a battery charger on the battery( you don't want it to go below 8 volts). Turn the key on for ten minutes, off for thirty seconds. Three times. Then try to start. If the voltage gets to low or you hit the starter at any time, you have to start over. This will reprogram passlock III keys to the security.

If there's not a button on your shifter then it has to be your electronic shifter sensor on Transmission

Is the battery the correct type? + to+???

Engine must be running to check the fluid level. Transmission should be hot, not cold. Then remove plug. Add transmission fluid until it comes out of plug hole. If the engine is not running and you remove the plug, you will lose a lot of transmission fluid.

PO128 is code for Coolant temp is below thermostat regulating temp. Sounds that either the thermostat is missing or stuck open. Hope this helps

You may need to go to a GM dealer. Their computers are a little more accurate than most mechanics. They are also familiar with your car and may have seen it before.

Motor oil removes heat away from the moving parts. Without motor oil, the engine gets no lubrication of moving parts and it over heats severely. Then moving parts expand in size and will seize up permanently. Your engine will have to be taken apart to see what parts were damaged. This could cost well over a thousand dollars or much more to get fixed.

timing belt could be off just slightly

you say everything works on the road but it just won`t start, so I am guessing you have had it run okay after the timing chain was installed. there fore it could be an ignition or fuel supply problem when trying to start. check for both to see which it is. if you have anti-theft on the car it may have activated, there will be a red light on the dash flashing while trying to start.

How is it at idle? A fast idle might be the result of a vacuum leak. Is there a check engine light with a code? Did you clean the mass air flow sensor?

it is #11 in the graphic below:

The air pressure in one of your tires is bad or the valve stem/sensor needs replaced. Hope this helps.

Try turning your key to the on position but do not start the motor. on your steering wheel press the page icon button and return arrow icon button at the same time and hold them both down for about 10 seconds. let go and you will see your information read oil reset. press the page button to cycle through all the options until you come to exit light delay. See if it's shut off there. And if so using the page icon button and the return arrow button on your steering wheel you should be able to set the time the lights stay on when you exit the car. If that don't fix this issue. There could be a relay or fuse that has gone bad. owners manual should give you the lay out of what fuse goes to what..or can find it on the internet also. Good luck and hope this helps