Question about GMC 2003 Envoy XL

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CAN I MANUEL TAKE OFF THE SERVICE ENGINE LIGHT OFF ON MY 2003 GMC ENVOY?

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Best you have the service center do all resets as any electrical changes could render the main auto brain to be damaged. There are specific controls that only a factory reset can be managed with an authorized program and any manual adjustments could end up costing you as much a $1000 or more in new hardware.

Posted on Apr 16, 2015

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If you take off both battery cables and touch them together for one minute it will reset the lite . but make shure they are disconnected from the battery !!

Posted on Apr 16, 2015

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2003 gmc envoy... I was told i needed a fan clutch.... Then. Next thing i know check engine soon, reduce engine power... Whats going on then computer... P1221, 1271, 1635 still not fix


if you were told that the fan clutch needed replacing and you did not do that , then the engine light and the loss of power would be a result of overheating of the engine and it going to limp mode
take it to a gm service centre for a explanation of the fault codes

Feb 12, 2017 | 2003 GMC Envoy

1 Answer

Liftgate hydraulics stopped working 2003 GMC Envoy SLT


Yes this is electrical. Start by checking the fuses.

Jul 19, 2008 | 2003 GMC Envoy

1 Answer

2005 gmc envoy engine shuts off


I have a '05 Envoy, 65k miles.
The engine randomly turns off. At a stop light, while making a turn.
There are no check engine lights on.
Starts right back up. Major pain at intersections.

May 29, 2012 | 2003 GMC Envoy

1 Answer

I have GMC envoy 2003 and the problem is the service engine soon light all the time and I recently changed the camshaft sensor and the lamp still there


What code is popping up fo the service engine light? If you don't have a reader, take it to an Autozone or a place that will read this light for free. Let us know what the code is to help further, as without this, it could be many different things.

Mar 18, 2011 | 2003 GMC Envoy

1 Answer

Code P0440. Have tried changing the gas cap but still service engine light on


2003 GMC Envoy has a problem with the gas tank. The plastic tank cracks at the filler neck inlet, causing some gas leakage and code P0440. GMC replaces gas tanks for free (up to 160?).

Jun 16, 2010 | 2003 GMC Envoy

1 Answer

Service engine soon and reduced engine power


disconnect batt. for 30 min. then reconnect,if no problem exist the lights will go away

Dec 20, 2009 | 2003 GMC Envoy

2 Answers

How to disconnect service engine light on gmc 2003 envoy?


why do you want to do this. If the light is on, fix the problem ASAP.

Sep 16, 2009 | 2003 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

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