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When it comes to the o2 sensors you really should replace them both at the same time. The first measures the exhaust gases before the catalitic converter and the second measures the gases after the catalitic converter and sends this information the engine management system.
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∙ 15y ago
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Where is the temperature sensor located on a 2002 GMC Envoy?
The ambient temperature sensor is located behind the front grill.
Where is the distributor on a 2002 GMC Envoy?
There is no distributor. The PCM uses a crankshaft sensor and a camshaft sensor to determine when to fire the coils.
What should the high and low voltage be on map sensor 2002 GMC Envoy 4.2 liter?
Try asking some of the technical gurus at our enthusiasts forum www.trailvoy.com Trailblazer/Envoy forum
Can a bad 2002 GMC envoy Oxygen Sensor drain the battery?
No, it can cause you to use and excesive amount of fuel but it will not effect the battery.
Where is the hook up forcode reader 2002 envoy?
Where to hook code reader 2002 envoy
Where is the Oil Filter for a 2002 GMC Envoy?
where is the oil filter located on an 2002 GMC Envoy
When was GMC Envoy created?
GMC Envoy was created in 2002.
When was the Envoy XUV introduced?
The GMC Envoy XUV was first introduced in 1998. The first generation lasted in production until 2000. They decided to re-release the Envoy in a second generation model that started in 2002 until 2009.
Running lights not working 2002 gmc envoy?
Riunning lighs not working 2002 gmc envoy
Installing Brake Pads on a 2002 GMC Envoy?
How to change brake pads on 2002 GMC Envoy front brakes.
Where is the map sensor for 2002 gmc envoy located?
It doesn't have a map (manifold absolute pressure) sensor. It has a maf (mass air flow) sensor and it is located in the air intake snorkel between the air filter box and the throttle body.
Where is the bcm on 2002 gmc envoy?
There are 2 BCM's on my 2002 GMC Envoy. The first in under the left side of the rear seat. (This is the one I had to change on mine) The second is in the rear liftgate. You'll have to remove the panel to get access to it.
