Thread: WTB LS4 water pump and TPS

2006 Grand Prix GXP
Really need a new water pump (mine is leaking around the pulley) and a tips or throttle body. My idle speed is about 20mph and my rpms are at 1100 when it used to sit at 5-600 at idle and I was told I need to replace my throttle position sensor... Which I also found out that I need the whole throttle body? If I'm wrong please let me know.

Originally Posted by marines542

You are correct you will need a new TB. Someone on here recently bought a new TB for same problem. The water pump is really simple to do and if I where you id replace the thermostat as well while ur at it. Aren't u parting out a GXP. There's ya a used TB

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I am parting it out but I think that when the battery caught on fire that it shorted out all the wires on the engine harness because some of them are melted even where the heat didn't get to them.. Would heat or a short hurt the throttle body? Also, how about the water pump? won't the seals be all jacked up since it's on the same side as the fire

Originally Posted by marines542

Replacing water pump in Impala SS 2006 2007 2008 models - YouTube
here is the video i used


Water Pump Replacement (LS4)
Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling.
2. Remove the battery and battery tray. Refer to Battery Tray Replacement.
3. Remove the drive belt. Refer to Drive Belt Replacement - Accessory.
4. Remove the water pump bolts (318).
5. Remove the water pump (300) and gasket (314). Discard the gasket.
6. Clean and inspect the water pump gasket mating surfaces.

Installation Procedure

1. Install the water pump (300) and a NEW gasket (314). Notice: Refer to Fastener Notice in the Preface section.
2. Tighten the water pump bolts (318). Tighten
   Tighten the bolts to 15 (11 lb ft).
3. Install the drive belt. Refer to Drive Belt Replacement - Accessory.
4. Install the battery tray and battery. Refer to Battery Tray Replacement.
5. Fill the cooling system. Refer to Cooling System Draining and Filling.

You are a life saver! Now to do the TB...

How much would a new oem replacement water pump be at a parts store with seals and all?

Originally Posted by marines542

The seals very well could be but if u were taking the pump off of any ls4 I would replace it anyways. Their only a couple bucks. And a short could damage it but I would try the one from the one ur parting out just to see if it works or not

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Very true, it's not like it would take very long to swap, everything is right on top. If i had to buy a new one though, i was told that they are 250 bucks minimum and that they are extremely hard to get ahold of

Originally Posted by marines542

When I did it on my buddies impala as the pump I got off rock auto costs lime 40 or 50. But total I charged him 100 for the work and that was still way cheaper than letting the shop do it for him

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Oriely's auto quoted me at 147 bucks for a new pump with gaskets.. should i just order one online? Are they trust worthy replacements parts though? I really don't want to ever have to do this again. If you could send me a link to the one you purchased that would be great. That'll save me a ton of money since I can put it in myself

ACDelco OE Service 217 2296 Fuel Inj Throttle Controls | eBay

Is this what i'm looking for??? If so then i might as well just buy it to save me the hassle. That's not too bad considering a new one from the manufacturer is 375

RockAuto Mobile Catalog
Found it. $75. And this comes with everything I need right? Seals and all?

Got everything fixed the other day. You weren't kidding about the hardest part being the stupid belt. I would have almost rather pulled the trans than do that again lol.
ended up buying a brand new pump since the one in the damaged car was all burnt up. I did however manage to get the TPS off the burnt car without a problem and it works great!! No more 1200 RPM idle speeds. She's sitting at a nice and quiet 500-600 after it's warm. Thanks for the help on the water pump! You saved me a ton of money.