Question about 2004 GMC Envoy

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CHECK ENGINE LIGHT ON

CHECK ENGINE LIGHT IS ON SAYS IT IS NOT COOLING ENOUGH I HAVE REPLACE THERMOSTAT BUT LIGHT IS STILL ON.

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Did you reset the computer after replcing the thermostat?

if not, remove the positive cable for 10 mins and replace.

This will solve the problem.

the computer is still reading that is is not cooling enough even though it maybe.

Posted on Nov 26, 2008

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Hello jonah! i need to replace a thermostat on my 2004 chevy colorado, 3.5 litre engine can you tell me where it is located on my engine?


Check this procedure for Canyon, Colorado 2004-2005 - Removal & Installation
  1. Drain the cooling system.
  2. Raise and support the vehicle only high enough to access the thermostat housing through the wheelhouse.
  3. Remove the left wheelhouse liner.
  4. Remove the radiator inlet hose from the thermostat housing.
  5. Remove the thermostat housing bolts.
  6. Remove the thermostat housing from the engine block.
  7. Clean and inspect the thermostat housing.
  8. Clean and inspect the sealing surface of the engine block.
To install:
  1. Position the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Connect the radiator inlet hose to the thermostat housing.
  4. Install the left wheelhouse liner.
  5. Lower the vehicle.
  6. Fill the cooling system.
  7. Inspect all sealing surfaces for leaks after starting the engine.
  1. Drain the cooling system.
  2. Raise and support the vehicle only high enough to access the thermostat housing through the wheelhouse.
  3. Remove the left wheelhouse liner.
  4. Position the hose clamp pliers to the clamp to remove the radiator inlet hose from the thermostat housing.
  5. Remove the thermostat housing bolts.
  6. Remove the thermostat housing from the engine block.
  7. Clean and inspect the thermostat housing.
  8. Clean and inspect the sealing surface of the engine block.
To install:
  1. Position the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Connect the radiator inlet hose to the thermostat housing.
  4. Install the left wheelhouse liner.
  5. Lower the vehicle.
  6. Fill the cooling system.
  7. Inspect all sealing surfaces for leaks after starting the engine.
Hope helps (remember to rating this answer).

Oct 06, 2011 | 2004 Chevrolet Colorado

1 Answer

Hi I own a 2003 Cadillac CTS I am getting a check engine light error light with code P0128 and my heat is fluxuating up and down I have already installed a themostat. What are my options


A code P0128 may mean that one or more of the following has happened:

1-Low engine coolant level
2-Leaking or stuck open thermostat
3-Faulty cooling fan (running too much)
4-Faulty coolant temperature (ECT) sensor
5-Faulty intake air temperature (IAT) sensor

Check coolant level
Check to make sure thermostat is functioning properly Check the Cooling fan Check the ECT sensor Check the IAT sensor If all else fails replace the thermostat

Jan 05, 2011 | 2003 Cadillac CTS

1 Answer

Check cooling light came on. Mechanic said it is a common glitch. Then check engine light came on. Is this connected to that glitch?


no glitch. get a new mechanic. . yes the check engine light can come on if your cooling light is on. first scan you check engine code at auto zone for free. next make sure your coolant level is full. next how is the conditoion of your belt? how many miles on your vechile? replace your thermostat.

Oct 27, 2009 | 2002 Chevrolet Tahoe

2 Answers

How do you replace thermostat


Mr. Lakewood,
The thermostat is in the housing at the end of the top radiator hose where it connects to the engine manifold. The thermostat housing is clamped onto the hose and is bolted to the engine manifold by two bolts.
1. Drain enough coolant from the cooling system to a level below the height of the thermostat housing.
2. Remove the two bolts and separate the housing from the manifold.
3. Remove the thermostat from the engine. You may have to pry it out if it is stuck. (Don't be alarmed if there is no thermostat. Some mechanics remove them for troubleshooting).
4. Scrape off the old gasket and sealant from the housing and the manifold.
5. Install new thermostat, pointy side towards radiator.
6. Use Permatex #2 (non-hardening sealant) on both sides of the new gasket and bolt down the housing.
7. Replenish cooling system.
8. Start engine, allow to warm up and check for leaks.
9 *done*

The Permatex #2 gasket sealant ($4 AutoZone) is in a small tube. One small tube is more than enough.

Oct 01, 2009 | 1989 Cadillac Brougham

4 Answers

Engine rapidly overheats,coolantvery near boils


Most likely the thermostat. The heater bypasses the thermostat. If the thermostat is blocked the only cooling is via the heater matrix. To check start the engine with the heater off and put your hand on the thermostat housing when the thermostat opens you should feel the housing get hot. If it doesn't the thermostat is faulty.

Aug 29, 2009 | 1998 Ford Escort

1 Answer

How to Replace Thermostat


Drain the cooling system down a little bit. Remove the upper radiator hose and heater hose from the thermostat housing. Remove the two bolts holding the housing to the head. Remove the thermostat and clean off the old gasket. Install the new thermostat and gasket and reassemble. Top off the cooling system. Run the engine and check for leaks.

May 04, 2009 | 2000 Jeep Grand Cherokee

2 Answers

Radiator boils over


There can be several causes, first replace the thermostat, radiator cap, also check to see if the cooling fans are working properly. They should automatically come on whenever the ac is on.

Apr 06, 2009 | 2001 Hyundai Elantra

1 Answer

Radiator cooling fan


You may need to replace the thermostat. The thermostat is what controls the fan coming on. If the car is having an overheating problem the check engine light will be on since it is not operating in the allowed tollerances.

Dec 21, 2008 | 2003 Toyota Sienna

2 Answers

Engine problem.


Hi Michael,

The motor shut off and the engine light came on, you won’t start right away and you wait a couple of days and start it again, sounds like your engine was over heated and because it is too hot and the engine frozen.

There are several kinds of engines, water cooling ,oil cooling and air cooling.

Over heated can cause many different problems for the cars, you should check step by step yourself.

Water cooling engine; if you know, you can help somebody.


1. Check the radiator see if you have enough coolant
2. Check the oil see if you have enough oil
3. check the water pump see if the water pump works fine
4. check the thermostat see it is function right.


Suppose your radiator has water or coolant, leave your radiator cap open, start your engine, let it is running 10 to 15 minutes and wait it is getting hot and see the water in your radiator, if the water moves, that means your cooling system works fine, otherwise either the thermostat frozen or the water pump was broken.

You mentioned when you re-start your car, sounds like a diesel engine, please check the where the noise from, if the noise from the water pump area, that means you need to change the water pump. When you change the water pump, change the thermostat at the same time, because when the engine over heated, the thermostat maybe damaged.

Oil cooling engine, check the oil pump. If the noise from the oil pump, you need change it.


Good luck,

Frank

Jun 05, 2008 | 1992 Volkswagen Jetta

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