Air conditioner leaking in rear of compressor at the top where there are two tubes held in place with a bracket and one bolt. How do I stop the leak?

SOURCE: The air conditioner blows hot air

Apart from doing a low side pressure check, you can try to recharge the system yourself with a refill kit that's readily available at most auto parts stores. If you're concerned about a leak, also get a can of R-134A with the UV dye that will show any leaking components.
RECHARGING AC SYSTEM

1. Turn the truck on and turn AC on HIGH
2. Locate the low side AC line (will have a valve and cap similar to the cap on a tire)
3. Insert the oil or R-134A can to the hose (Do not turn the screw to puncture the can yet)
4. Insert the other end of the refill hose to the low side valve
5. Puncture the R-134A can with the screw on the refill hose
6. You should feel the system suction the refrigerant out of the can
7. Check for frost on the AC lines and the air blowing inside the truck
8. If frost develops and the air is cold, you've successfully recharged the system and disconnect the refill hose. DO NOT ADD MORE REFRIGERANT...overcharging the system will damage your compressor and will be less effective

SOURCE: water leaking fron back of engin

its a intake manifold or the heater core return hose to the rear of intake

SOURCE: 1999 Gmc Jimmy water leak under the transmission

I believe the heater hoses are on the pass side on your truck, but have you checked where the heater hoses go into the truck? Otherwise on the driver side I would check 2 things after I checked the hoses 1. Intake manifold check it up and down they are bad for leaking at one of the corners. and it could be running down the back onto the ground. 2. check the freeze plugs. if you can go to autozone see if they will loan you a coolant press test kit other wise they are about 30$ for one .With the car off top the coolant off and press the system to what the rad cap is rated 15 or 16 ect. get your flash light and chase the drip. I would say the intake is your first shot at finding it. if you have a uv light you can also add dye to the system let it run and find it. First get some thing to stand on get on over the intake and find the coolant just remember it can leak from here and run and drop there. hoses , intake , freeze plugs

Testimonial: "Thanks! This information really help. I know its a little late but thank you so much. I did follow the leak and it was the head gasket. "

SOURCE: My front differential is leaking!

neither of the previous solutions are coming from ppl who know what they are talking about. i am in the process of making this exact repair, on the same front differential. you have to un-bolt the cv from the axle shaft, then drop the front diff. the passenger side is easier to deal with than the driver side from what i'm experiencing. once you remove the axle tube from the passenger side it is very simple to dissassemble and replace seals and bearings. the drivers side however is a different story. there is a lock ring that holds the axle shaft into the diff on the drivers side, and i have yet to get to it to remove the axle shaft. once the axle shaft is removed, then you just pry out the seal and carefully tap a new seal in its place. reassembly is the opposite of disassembly. if you find out how to remove the axle shaft snap ring, please let me know. hope this helps

SOURCE: 2003 GMC YXL DENALI - "Service Ride Control" Error message

check youer air shocks for leakes and rear hight sensor