20 Most Recent 2002 GMC Envoy XL - Page 3 Questions & Answers

If its clear water on the ground its the a/c drain.

check for leak if you see any fluid on the ground where you park

check alt fuse, check from alt positive post to battery make sure you have 14 at alt and close at battery also if you ran battery down a few times may need to be checked and or charged that and dont be fooled some alternators that are rebuilt just had a little part here or there replaced ya might have got a bad one

When you changed the stat, you probably disconnected the battery. This caused the HVAC to lose its calibation and during the recalibration, one of the mode control actuators or the associate doors failed. You can try to force another recalibration by doing the following;1) turn all HVAC controls and switches to their OFF or CCW positions.2) disconnect the battery for a few minutes (>2 min.)3) reconnect battery and don't touch any HVAC controls for a few minutes.If this does not return the system to working order, you will have to have the actuator(s) replaced. Attached is a diagram of their locations.

1. Press and hold the personalization button (2) and the trip information button (1) at the same time. The DIC will begin scrolling through the languages. Each language will be shown in that particular language (English will be in English, French will be in French, etc.).
2. When the preferred language appears, release both buttons. The DIC will then display the information in the language that was selected.




Hope this helps...

Assuming you're talking about the HVAC mode actuators, below are a couple of diagrams showing the location of components in both the front and rear HVAC units.

Check for voltage at the plug in the back of lights...
If you have voltage, its the bulb.
If you don't have voltage...then check the fuses.
GM has low beam and high beam fuses.

Hope this helps...

you have to press it out or take off the bolts on the ball joints and replace

What codes do you have?
I assume getting a check light on & checking for
codes, is something your all too familiar with?

Have you checked for a fuse or the relay? If not in the engine compartment fuse panel (picture of it below) is a fuse for the A/C and will be in the number 30 position (diagram of layout of fuses below), Also there is a "micro relay" in that same panel in the number 44 position. Other then that there could be several reasons. If you are low on freon, it will not engage. You could have a faulty pressure switch. See if you are getting power to them. I believe there is one for the high & low side. Lastly you could have a wiring problem to the compressor itself or the clutch itself could be bad as well as the compressor but I would check the fuse & relay first. I hope this helps and good luck.

pop hood open make sure battery cables ,post are clean from corrosion and tight .if problem still persist i would have my alternator tested

Sounds like a vacume line has come off, Need to listen closely for air hissing , Then repair the line, Tip, you can spray wd/40 all over engine and when you get to the leaking line it will make your engine accellerate by itself. Best of luck to you,

remove belt and clean all groved pullys

UNDER THE HOOD IS ANOTHER FUSE BOX FOR THE LIGHTS.