Question about 2004 GMC Envoy

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04 GMC Envoy 4.2 Get PO0171 code and since the envoy doesn't have a MAF sensor what is the most common problem.

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First thing to do is to run some Techron injector cleaner through the gas tank, then a cleaning of the throttle body is also very important. For more information, check out www.trailvoy.com, this forum is a wealth of information on Trailblazers and Envoys.

Posted on Sep 27, 2010

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Where is mass air flow sensor located on 2005 gmc envoy?


looking at the engine to the left /passenger side front will see the air filter housing and a large black tube the m.a.f. is mounted inline with the tube next to the air filter box
How To Install Repalce MAF Mass Air Flow Sensor v8 5 3L GMC Envoy and XL...

May 29, 2016 | GMC Cars & Trucks

1 Answer

Envoy shakes when stepping on the gas after a stop or slowing down


run fault codes and look for faulty sensors involving- rpm- MAP?MAF - cam/crank position sensors and ho2 s sensors.

Sep 20, 2013 | 2002 GMC Envoy

1 Answer

What is a p1680 mean on a 04 Envoy? there is alos some hesitation while ideling at a stop light and when u have the heater on high


Code P1680 refers to the accelerator pedal sensor, there may be a bad connection or the sensor itself is dirty and needs replacement.
The hesitation could be cause by a dirty throttle body, needs to be cleaned thoroughly front and back.

Jan 16, 2013 | 2004 GMC Envoy

1 Answer

How many speed sensors does a 2005 gmc envoy xl have


Your GMC Envoy has 4 wheel speed sensors:

http://www.answers.com/Q/Speed_sensors_2005_gmc_envoy

Apr 03, 2012 | 2005 GMC Envoy Xl

1 Answer

My 2003 GMC envoy will start then shut off unless I give it gas why is this


Bad MAF mass air flow sensor, air filter, fuel filter or a vacume leak.

Oct 04, 2011 | 2003 GMC Envoy

1 Answer

Do you need to mess with computer when installing cold air filter gor gmc envoy 03 v6


The computer should automaticly adjust.You should clean your mass airflow sensor so you make sure you get a acurate read.They have MAF sensor cleaner in a spray can,and should be cleaned everythime you clean or replace your air filter.Well hope this helps,and good luck.

Mar 25, 2010 | 2003 GMC Envoy

2 Answers

Engine light/ knocking sensor


The knock sensor is for the timing advance on your envoy. It will not be related to your sparkplugs. Your knock sensor will be screwed into the engine block, or under the intake depending on model. The V8 engine is under the intake.

Apr 30, 2009 | 2004 GMC Envoy

1 Answer

O2 Sensor


not very, but I own an 04 envoy, same engine light troubles, figured it was the o2 sensor, so I took it to my mechanic to have him tell me which sensor, so I could replace it.  Turns out the sensors are fine, but the secondary air pump is malfunctioning and needs to be replaced.  This is apparently a very common problem with this car, and I would suggest having a diagnostic ran before replacing anything, and besides, if it was an 02 sensor, there are 3 or 4 of them on the envoy and you need to know which one is failing anyway, and only a diagnostic can tell you that.

Dec 29, 2008 | 2004 GMC Envoy

1 Answer

Can't locate Intake Air Temperature Sensor Connector


The IAT is integrated with the MAF (Mass Air Flow) sensor all one unit the following diagram should help
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Dec 05, 2008 | 2006 GMC Envoy

3 Answers

2004 GMC Envoy has trouble idling


Try the fuel filter. Sounds like the engine might be running rough due to weak fuel pressure. Its cheaper to replace, especially if it's still original from 04. Try running some injector cleaner through a couple of tanks of high octane gas.

Aug 06, 2008 | 2004 GMC Envoy

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