Question about 1999 Pontiac Grand Am GT

1 Answer

2003 pontiac grand am where is thermostat located

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Pontiac Master
  • 3,854 Answers

If you have the 3.4 V6, the thermostat is under the throttle body. Just follow the upper radiator hose to the engine where it connects. Where the hose connect's to on the engine is the thermostat housing and the thermostat is under it. If you have small hands, you can remove the housing with a socket, u joint extension. If you have to remove the heat shield to the exhaust pipe, If it's still to tight for you. Your going to have to also remove the throttle body to get to the thermostat housing and remember to buy a new throttle body gasket. Good luck and hope this helps.

Posted on Jun 03, 2009


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 31 Answers

SOURCE: thermostat location

On a GM six clinder it is in the housing that the upper radiator hose is hooked on the upper intake. It is very difficult to remove with the exhaust cross over pipe in the way but is possible with some time.

Posted on Dec 23, 2008

  • 80407 Answers

SOURCE: how to change thermostat

follow the upper radiator hose to the engine, where that hose is clamped to the engine remove that large hose nipple, the t-stat is under that.

Posted on Mar 16, 2009

  • 55 Answers

SOURCE: replace thermostat 2003 pontiac montana

yes but with the right shaped wrenches and tiny hands it can be done without removing the exhaust crossover pipe

Posted on Oct 16, 2008

  • 337 Answers

SOURCE: thermostat

Posted on Dec 03, 2008

  • 15935 Answers

SOURCE: Where is the thermostat located on a 2003 pontiac aztec?

grab hold of the upper radiator hose, and follow it back to the engine block. The housing the hose is attatched is where the thermostat is hiding :)

Posted on Jan 14, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Need to know where the thermostats is located at on a 2003 Pontiac Grand Prix 2.2litter

thermostats are always on the motor end of the upper radiator hose inside of a cast housing .

Jan 19, 2017 | Pontiac Cars & Trucks

1 Answer

2003 Pontiac Grand Am a/c will only blow cold when engine cooling line is crimped closed ?

You need to figure out what your heater thermostat valve looks like... locate it & replace it... (or figure out why it is not working).

Blend door/baffle... control solenoid.. whatever!!

At rock auto (below)...

Also check out BBB industries for your wiring diagrams...,2003,grand+am,3.4l+v6,1410994,heat+&+air+conditioning

BBB Industries Premium Alternators Starters Power Steering Products

May 25, 2016 | 2003 Pontiac Grand Am

1 Answer

Pontiac grand am I had a diagnostic reading at autozone for diagnostic codes po128,po440 and p1189 don't know what they mean for a 2003 Pontiac grand am gt 3.4 liter and v6 engine vehical

PO128 -- engine coolant low or thermostat not working
P0440 - EVAP system malfunction, gas cap loose - Cat convertors missing from car can cause this
P1189 - Engine Oil Pressure Switch Circuit -- CAT CONVERTORS MISSING FROM CAR can cause this.

Jan 28, 2015 | 2003 Pontiac Grand Am

2 Answers


Hello if you have a 3.4 v6 engine, it is mounted on the driver side of engine. it is just under the throttle body.

Jul 07, 2011 | 2003 Pontiac Grand Am

1 Answer

Where to locate the thermostat on an 03 pontiac grand am?

Not sure which engine you have so please pick the appropriate engine:

2.2L Engine
  1. If equipped with an automatic transaxle, remove the exhaust manifold, as outlined in this section.
  2. Drain the cooling system.
  3. Remove the thermostat housing to water pump feed pipe bolts.
  4. Remove the thermostat housing to water pump feed pipe.


Thermostat mounting-2.2L engine

3.1L Engines

  1. Disconnect the negative battery cable.
  2. Drain the cooling system to a level below the thermostat housing.
  3. Remove the air cleaner assembly.
  4. Disconnect the surge tank line from the thermostat housing.
  5. Remove thermostat housing-to-intake manifold attaching bolt and nut, then remove the housing.
  6. Remove the thermostat.

3.4L Engine
  1. Drain the cooling system.
  2. Remove the air cleaner.
  3. Remove exhaust crossover pipe.
  4. Disconnect the surge tank line fitting from the coolant outlet.
  5. Remove the thermostat housing to intake manifold bolts.
  6. Remove the thermostat housing outlet and thermostat
  7. Clean the mating surfaces.

Nov 01, 2010 | 2003 Pontiac Grand Am

1 Answer

2003 Pontiac Gran Prix GT 3.8L Thermostat replacement

Yes. Remove the housing (not the hose) and you'll find the thermostat.

Jul 08, 2010 | 2003 Pontiac Grand Prix

3 Answers

Where is the thermostat located on a 2003 grand am gt 3.4 V6

The thermostat is located just under the exhaust manifold you will see that a metal pipe leads from the water pump to where the thermostat housing is. You must to remove two screws from where this pipe meets the housing and it is a pain to do unless you remove the exhaust manifold or have small hands.

Dec 29, 2009 | 2003 Pontiac Grand Am

1 Answer

Where the thermostat is located in the 2003 grand am



Jul 12, 2009 | 1994 Pontiac Grand Am

2 Answers

Where is the thermostat for 4 cyclinder 1999 pontiac grand am

follow the top radiator hose to the engine and that should be where the thermostat is located

Feb 22, 2009 | 1999 Pontiac Grand Am GT

Not finding what you are looking for?
1999 Pontiac Grand Am GT Logo

376 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

80407 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides