20 Most Recent 2009 GMC Acadia - Page 3 Questions & Answers

Try another key may be the chip in the key is bad the immobilizer system disables the engine if the key is not recognized

I am assuming the light is in close proximity to the horn and the light has a poor wiring connection either feed or ground. check for loose or corroded connection. The vibration from the horn has "jiggled" the connection.

Usually this happens when somebody pushes the wrong button to turn on/off the dome or map lights. On my car (not an Acadia) there is a button marked "Off" and another marked "Door." If you push "Off," you not only turn off the dome lights, you stop them from turning on when you open the doors. To correct this you have to push "Door." Not what you would expect a button marked "Door" to do, right? I'll bet there's something similar going on with your car.

How loud do you play the radio? If you like pumpin' out the volume, you could be blowing up the speakers with too much power. New aftermarket speakers (not GM's replacements) may be the answer. Go to a place that does custom installations and ask for their advice on what to buy. The only other possibility is that the speakers are not sealed properly and water is getting in and corroding them over time. But that's pretty unlikely.

Yes. Do you have the owners manual?

I would go to what we use to call a junk yard.

Not positive for this model, but usually passenger side, near the firewall, inline and perpendicular to a silver tube about the size of an average man's pinky finger, with a plastic cap that is either black or blue and has a large "L" molded into the top. Likely half-hidden behind hoses, tubes, wires, etc. Alternative location is near the radiator, same side.

several reasons why ac not blowing cold. Most common a freon leak causing system to be undercharged. electrical and component failure may also be a factor. You need a set of gauges. find the compressor start engine with a c off the compressor clutch wont be engaged now turn it in on and see if clutch engages. If it engages you need to know what your low and high side readings are. You should have your system diagnosed be a seasoned pro...... If clutch does not engage you probably are low on freon. Put dye in the system so you know where the leak is when it leaks again. you can buy freon with dye already in it.

Reset? Not sure what you mean. Try replacing fuse, recharging system. Does that fix it?

The Acadia's battery is beneath the floor behind the front passenger seat. Slide that seat all the way forward, then open the rear passenger door. If you've got a floor mat directly behind the front seats, it will have to be moved aside. There is a panel on the floor with one screw holding it closed. Remove this panel to access the battery compartment.