iFixit - Answers With Device "2004-2008 Pontiac Grand Prix"

2004-2008 Pontiac Grand Prix: How do I reset security?

Sat, 31 May 2025 18:05:16 -0700

car disabled because of security

⟐ Commented May 31, 2025 at 18:05 MST

2004-2008 Pontiac Grand Prix: I put the wrong grade gas

Sat, 27 May 2023 07:38:01 -0700

What do I need to do ?

⟐ Answered May 27, 2023 at 7:38 MST

2004-2008 Pontiac Grand Prix: Bulbs are burnt out in Radio Display. Can they be replaced?

Mon, 22 Aug 2022 06:44:27 -0700

Radio Display bulbs are burnt out

How do you replace them

⟐ Commented August 22, 2022 at 6:44 MST

2004-2008 Pontiac Grand Prix: Why is my hot coolant light on after I fixed my ac and applied coolant

Sun, 21 Jul 2019 14:26:11 -0700

My cars hot coolant light is still on after I just got my a/c recharged and the coolant refilled, I believe it’s my radiator fan but I’m not sure what should I do?

⟐ Answered July 21, 2019 at 14:26 MST

2004-2008 Pontiac Grand Prix: Why is my car dying while I am driving down the road?

Sat, 17 Apr 2021 20:30:50 -0700

As I am driving down the road my car will just die. I lose power steering and power brakes. Once I pull over it will turn back over and start. Sometimes it sounds like the starter might be sticking when I try to turn it over to start. So I'll know it wont run right if it does that and I will turn it back off. Eventually it will start again but may die at any time driving.

⟐ Answer edited April 17, 2021 at 20:30 MST

2004-2008 Pontiac Grand Prix: Multiple System Warning lights on

Wed, 28 Apr 2021 11:34:02 -0700

The transaction control, service break system and service abs system warning came on all at once in my 04 pontiac grand prix 3.8 . I have all new breaks all the way around. And replaced the right rear wheel bearing abs hub per the scan results. The lights will go off for awhile then come back on. Battery and Alternator were checked and they are in perfect working order

⟐ Commented April 28, 2021 at 11:34 MST

2004-2008 Pontiac Grand Prix: Why is my car saying its overheating but doesnt start leaking everywhe

Thu, 17 Jun 2021 06:48:57 -0700

2006 Pontiac grand Prix3800 replaced water hose ignition coil n gaskets intake manifold water pump two thermostats back right wheel barring back brakes front wheel barrings oh yea another ignition coil and this is all since day before Christmas. Last night gauge went all the way up in interstate had only had car on for maybe 5 min didnt start smoking like it did when my radiator hose busted but when I shut it off it started spewing all over bye my belt and ignition module. Let it sit all night put little bit water in it to get home almost has leaked out im at my witttsss end HELP ME PLEASE

⟐ Answered June 17, 2021 at 6:48 MST

2004-2008 Pontiac Grand Prix: Why does car spit n sputter and barely runs

Thu, 01 Apr 2021 17:56:08 -0700

I have an 05 Pontiac Grand Prix with 3.8 series 3 V-6 engine. I washed it and it started spitting n sputtering bogging down, I barely made it home. What would cause this? Is it the fuel filter, where is the fuel filter

⟐ Answered April 01, 2021 at 17:56 MST

2004-2008 Pontiac Grand Prix: turns over but will not fire

Fri, 04 Dec 2020 08:17:11 -0700

my car has gas in it does not stall or hesitate was running just fine until a couple days ago it died while idling started right back up but when i parked it when back out a while later it wont start turns over but wont fire

⟐ Commented December 04, 2020 at 8:17 MST

2004-2008 Pontiac Grand Prix: Transmission not shifting to fourth gear

Tue, 20 Jan 2026 23:13:42 -0700

No fourth gear

⟐ Commented January 20, 2026 at 23:13 MST

2004-2008 Pontiac Grand Prix: How to change heater core

Thu, 08 May 2025 08:16:36 -0700

My passenger floor mat is being covered in coolant and it is coming from behind the dashboard where the heater core is located. I would like to know the proper steps to take in order to remove the dash, like what exactly I have to remove, and how to remove it so I don't remove anything unnecessary. I also would like to know how the cover for the heater core inside of the cabin would come off because from what I can tell there are plastic rivets holding it in place

⟐ Answered May 08, 2025 at 8:16 MST

2004-2008 Pontiac Grand Prix: Anti theft system/Lock system, stuck in learning mode

Thu, 18 Apr 2024 05:59:34 -0700

So I got an 05 grand prix, the theft system is in learning mode and I can start it, though I only have the valet key for it, I assume if.i just do the learning procedure it will take it out of learning mode though, I haven't tried it cause I'm not sure if my key will start it if I do and I'm not ready to pay for that headache , unless itl be fine if I do take.it out of learning mode, also having issues with the door lock switches only locking the doors and the trunk release won't work either cause it's part of the lock switch, but putting it into drive locks and putting it into park unlocks them just fine.

⟐ Commented April 18, 2024 at 5:59 MST

2004-2008 Pontiac Grand Prix: cranks but fuel pump isn't coming

Sun, 18 Jun 2023 09:30:23 -0700

2005 grand prix clicking in dash cranks but fuel pump isn't coming on3800 series 3

⟐ Answered June 18, 2023 at 9:30 MST

2004-2008 Pontiac Grand Prix: What size bolt holds a.c. clutch pulley

Thu, 16 Mar 2023 19:44:45 -0700

What is the bolt or screw size to change my ac clutch assembly

⟐ Answered March 16, 2023 at 19:44 MST

2004-2008 Pontiac Grand Prix: Car quits and doesn't give me a check engine light or any codes.

Thu, 12 Aug 2021 16:31:18 -0700

My car has been cutting off multiple times in the past month. like as if the engine just cuts off. it has happened going down the road with my foot not on the gas. And Yesterday it had a hard time cranking.

⟐ Commented August 12, 2021 at 16:31 MST

2004-2008 Pontiac Grand Prix: Heat/ac fan turning on when car is off and locked.

Thu, 28 Apr 2022 16:03:34 -0700

Hello,

I have a really serious problem where my hvac fan is turning on at full blast on it’s own. I would turn the fan knob all the way to off, turn the car off, close and lock the door, and if I come back like half an hour later or so, theres a chance the fan will be running.

And the only way to turn it off is to turn the key on and off a few times, as turning the fan knob to high then back to off does nothing. However, when the car is running, I have no problem with it, it works as it should.

I need a solution to this real fast because it could come on at night, and run the battery down, and then in the morning when I leave for work boom dead car.

TL;DR: Hvac fan is turning on by itself, need a fix.

⟐ Comment deleted April 28, 2022 at 16:03 MST

2004-2008 Pontiac Grand Prix: o2 sensor placement and replacement

Sun, 09 Feb 2020 04:44:14 -0700

How many o2 sensors are on an 04 Pontiac Grand Prix GTP?

⟐ Answered February 09, 2020 at 4:44 MST

2004-2008 Pontiac Grand Prix: Why will the door behind the driver not unlock with key

Sat, 08 Feb 2020 08:01:09 -0700

All the other door locks unlock with the key with the exception of the one behind the driver.

⟐ Answer edited February 08, 2020 at 8:01 MST

2004-2008 Pontiac Grand Prix: Car starts then acts like it wants to die then idles and runs good

Tue, 12 Jun 2018 06:25:28 -0700

Does it everytime i start it bit it always starts the acts like it wants to dies then idles and runs good temp doesn't seem to have any change on it checked fuel preassure it was at 55 lbs

⟐ Commented June 12, 2018 at 6:25 MST

2004-2008 Pontiac Grand Prix: need the wiring harness diagram colar coded engine side

Sun, 04 Jun 2023 00:08:17 -0700

I need the wiring harness diagram colar coded engine side going into fuse box 2004 gtp under thehood

⟐ Answered June 04, 2023 at 0:08 MST