Question about 2003 GMC Envoy

2 Answers


Posted by on

  • Dennis Yachimec May 11, 2010

    You need the codes read.



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Try opening and then closing the gas cap. This sometimes resets the sensor in the tank.

Posted on Apr 25, 2009

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 36 Answers

Your check engine light is to notify you of an emission problem. your local autoparts dealer will most often check your code for free.

Posted on Apr 15, 2009


4 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

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 375 Answers

SOURCE: check engine light on - 2003 gmc envoy XL

That code represents a lower than expected reading for temperature (coolant). First thing to do is check your coolant level, as if it is low, then the sensor can not read correctly. Second, you may have a thermostat that is stuck open, allowing the coolant to cool off too much. The sensor should be mounted on top of the engine, near the thermostat housing.

Posted on May 18, 2008

  • 341 Answers

SOURCE: Replace the thermostat on 2002 GMC Envoy

4.2L Engine the thermostat and the neck where the hose goes on is one unit $25 at autozone

  1. Remove the necessary coolant from the radiator.
  2. Remove the alternator, Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
  3. Remove the thermostat housing bolts.
  4. Remove the thermostat housing from the engine block.
  5. Clean all of the surfaces of the thermostat housing.
  6. Clean the sealing surface of the engine block.

Posted on Dec 29, 2008

  • 6674 Answers

SOURCE: i have a 2002 gmc envoy bringing up codes P0440

440 is Evaporative emission control system malfunction. Could be as simple as cleaning your gas cap & filler well & making sure gas cap is on tight, as that is the most common cause, otherwise you may need to check for vacuum leaks or purge solenoid has failed, or canister may be plugged.
495 is telling you that your engine/rad cooling fan, is malfunctioning as well, which I suspect is causing that noise your hearing. Have it looked at a.s.a.p. as it can do some real $$$ damage if it flies apart.
Have codes erased after fixing fan & making sure cap is tight, then see if 440 comes back, if it does, you may need to do more investigation.

Posted on Sep 03, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

How to reset service engine soon light off on 2002 gmc envoy

First have scanned for codes could be something wrong. Then fix the problem and use the code scanner to reset light

Jan 16, 2017 | 2002 GMC Envoy

1 Answer

My whole dash went out on my 2002 gmc envoy all the gauges arent working i checked fuses under the hood they seemed fine. Any advice for these problems?

Does it light up ? When you turn the key on do the warning lights come on ? Check engine , oil , abs , air bag etc... just gauges not working ? Does the vehicle start an run ? With vehicle running is check engine light on ? GM had a problem with the stepper motors that control the gauges . How to repair GM Instrument Cluster Speedometer Gauge Stepper

Sep 12, 2016 | 2002 GMC Envoy

1 Answer

How do I get the check engine light off on a 2002 GMC Envoy XL

Depends on why it turned on. If it is the maintenance minder light follow the instructions in the owners manual. If it is due to a engine problem, you will have to solve the problem first and then reset the light. This should be determined with an auto code scanner which can be rented or purchased at an auto parts store. Many will even check the codes for you as it is very easy and they figure that if they help you they can sell the parts to make the repair.

Sep 14, 2014 | 2002 GMC Envoy XL

1 Answer

I have a strong smell of gas at startup on my 2002 envoy

Check you fuel pressure regulator on thevaccuum side pull the line off turn key on and there should be no fuel on the vacuumside if r
there is thenyoir regulator is bad

Dec 19, 2013 | 2002 GMC Envoy

1 Answer

GMC 2002 Envoy wont start

have the engine code read that will give you a new starting spot. without just throwing money at it.

May 27, 2012 | 2002 GMC Envoy

1 Answer

Code P1481 cooling fan system performance 2002 gmc envoy

I have a service engine soon light and the code that appeared when check is 1481, do you know what this means?

Oct 29, 2011 | 2002 GMC Envoy

1 Answer

It wont turn on,i have to give it some gas to make it come on.and when i press the brakes to stop it turns off(gmc envoy 2002 )

Is your check engine light on? This sounds like an EVAP problem. Could be a bad canister vent valve or Canister Purge Solenoid.

Jan 17, 2011 | 2002 GMC Envoy

2 Answers

I have a service engine soon light and the code that appeared when check is 1481, do you know what this means?

Service Engine Soon (SES) or Check Engine Light On, DTC P0480, P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness) #05-06-02-012B - (10/19/2006)

Models:2004-2006 Buick Rainier
2002-2006 Chevrolet TrailBlazer, TrailBlazer EXT
2002-2006 GMC Envoy, Envoy XL, 

Some customers may comment that the Service Engine Soon (SES) or Check Engine light is illuminated. This condition may be intermittent and upon investigation, the technician may find either DTC P0480, P0526, P1481 or P1484 set.

This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This contact may damage the insulation of the wires enclosed in that harness.

Replace the wire harness: 
Part Number 89024920 Description Harness Assembly, Engine Cooling Fan Wiring

Good luck and keep me posed. 

Aug 11, 2009 | 2003 GMC Envoy

1 Answer


Is the service engine light on? If so, take the vehicle to your local Auto Zone and ask them to check your Envoy for trouble codes, write the codes down and reply back to me.
Let me know.

May 09, 2009 | 2002 GMC Envoy

Not finding what you are looking for?
2003 GMC Envoy Logo

Related Topics:

467 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

76691 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

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

Answer questions

Manuals & User Guides