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5

There are three places I can think the water would be flowing out of from the back area of the engine. The engine in your Yukon should be the GenI Small Block Chevrolet (SBC) engine (I believe they started putting LSx motors in them in 1999). The SBC has water passages through the intake manifold at the front and back of the engine. If one of these passages ...


5

My experience with vehicles I have owned over the years with this case I would say dirty connections on main battery leads remove your battery connections clean the battery posts to a shiny metal state also clean the inside of the cable ends to with the proper cleaning tool if this does not fix problem check other ends of cables for dirty ...


4

If it is not obvious from where it is leaking, your best bet is to go on a car wash, and clean the engine as much as you can. Leave the car dry, fill up the coolant, and then try to replicate the issue. Also before you try to replicate the leak, it might be a good idea to remove any plastic covers from the top and the bottom of the engine.


3

Here's what I found: (Zaid has a good answer, but sometimes on a four wire sensor the ground is floating inside the ECU [as with your Yukon] - which makes his "Step 2" not always reliable. Still, in most cases you could go the "Zaid Route" in the deep woods without power or the internet (a solar soldering iron maybe). Worst case is you would have to flip ...


2

Given the description of the problem, I think the comments are exactly right, this is an issue with your transmission. Now you need to determine if it's just fluid level, or if there is something more serious going on. Couple of things you can do, first, follow the instructions in the comment by @DucatiKiller. That will get you into the proper fill level. ...


2

I think I'd agree with you about the longevity of the current transmission. It sounds like it's slipping. A transmission shop might diagnose a bad solenoid or something which could be allowing the transmission to slip. Unfortunately, your Yukon came with the 4L60e transmission, which is a weak tranny for what it is required to do. It really is the weak ...


2

Sensor-side This Q&A covers how to determine the sensor-side wiring. Body-side You'll need a multimeter to follow the steps below. This procedure also assumes that the O2 heater circuit functions properly). Determine the two heater wires Set the multimeter to voltage mode (not amperage mode!). Start the vehicle with the engine cold. The O2 heater ...


2

If your tire is "shredded" as you describe, it is beyond repair. There is no way to put that tire back on your rim. Either use your spare tire on your car or use another vehicle to get the rim over to the tire shop, and buy a new tire.


1

You can rule out the trailer by jacking up one wheel (that has brakes) and applying 12V directly to the disconnected trailer plug pins. If the brakes are functional, the wheel should lock solidly. I doubt it's the trailer, but it's a fairly easy check. Does your controller have a manual lever? If so, does that work? Testing the controller may likely ...


1

I don't have specific experience with GMC Yukon or Chevrolet Tahoe hybrids, but I do know quite a bit about Toyota hybrids. Basically, the transmission is nearly indestructible, being based on an electric CVT approach. If you ever manage to destroy it, replacement of the transmission with its two integrated electric motors costs less than replacement of a ...


1

Another possibility that I have seen is that the battery has a broken link inside which makes and breaks the connection. Either borrow a battery and see if the behaviour stops or purchase a battery...


1

I had a similar problem and could not find the leak. I did the above recommendation (cleaning the engine) and the leak was the at the intake manifold gasket (right rear side). I hope this helps.


1

It's very likely due to an issue of the Ignition Switch failing to read the VATS/Security Key/"PassKey" Resistor. Here is a site that outlines the different Model Years effected. Here is a regurgitation of that site: Problem Description The anti-theft system may fail causing a no start condition, the security light may illuminate. Our technicians ...


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