1999 GMC Yukon turns over but will not start, there is a clicking sound, the check engine light came on the last time it started .

Sounds like the immobilizer system is preventing you starting it. This usually requires a main dealer to fix.

Have you changed the distributor cap

This problem you are having sounds like a crankshaft sensor going bad. Do you have a check engine light on, in your dash? Have your computer scanned, and cars computer will tell you what the problem is. GOOD LUCK FRIEND.

Check if the fuel pump has quit. Do you hear it turn on for a couple of seconds with key in on, not start? Have the fuel pressure checked, or check that gas is getting up to the engine.

Not exactly.
The check gauge warning light is on because the temp gauge is reading hot.
Does the temp gauge read hot as soon as you turn the key switch on, or not until the engine as run for a few minutes ?
If it reads hot without the engine being started, there may be a short in the wiring or the sensor may have failed.

I would start by making sure the tire pressure in all the tires are the same and that the tread on the tires have the same amount of tread left. If they are just a little off the Service 4WD light will come on and most of the time that is the problem. Once all 4 tires are equal in pressure and tread wear, it may take a few times of starting, driving around, and shutting the engine off for the light to turn itself off and realize the problem is corrected. Hope this helps but if not, reply and I will keep helping until the problem is fixed.

check your torque converter and solenoid to ensure it doesnt need replacement hope this help good luck

You have a short in your daytime runnig lights

Rear of engine, on the bottom, near the lip of the oil pan, passenger side.

You said the check engine light is on. Have you had it scanned? What is the code number?