Hooking up the amp i had the ground wire connected and was going to hook up the power wire and it hit the case of the amp know the amp turns on but there is no sound from the speakers other amps work on the same wiring and the subs work as well

Your description, I take it, is a problem with the wiring harness going from the driver's compartment to the rear lights. If that is the case, the normal color code for GM is brown for tail lights, dark green for the right stop & turn, yellow for the left stop & turn and light green for the backup lights. Any black wires should be grounded. The white wire in the trailer harness is for a ground when used on a trailer. It sounds like you have the green and yellow T&S wires shorted together somewhere! Some of the later vehicles use separate stop and turn bulbs... these would have a separate wire for the stop lights only, but I don't think your truck is new enough for that. Good luck!

Your basic crossover is going to have a power (+) and ground (-). Your power wire goes to the battery, and your ground goes to the frame. You will need to hook up your RCA or speaker wires to the input side. Then hook the other two RCA connections to your amp.

Fused 12 volt power wire from the battery connects to +12V at the amp. Chassis ground wire connects to gnd at the amp. Switched 12 volt power wire (accessory) (remote turn on from after market radio) connects to rmt at the amp.

on most amp red isnt good that means it in protection mode try turning your setting on the amp down all the way and turn the volume down tell you can get sound out of them then turn up the volume to were you would to them most and set the to what sounds the best but make sure the light doesnt dim down when the base hits

you should have 4 or 3 wires... cd turn on wire, ground wire, power wire, and last audio input and output wire... to hook the power wire up you would have to lead it going to the power source and make a hole or find one to travel it to the engine from inside the car, then bolt it the the car battery terminal. the ground wire you would have to bolt it to the body of the car from inside the trunk or where ever you have the amp, as long as it is connected to somthing metal! the cd turn on wire you would have to travel it to your (after market cd player or stock) to behind it, into the connecter which should be 16 or 12 and hook it in one of the wire holes! this also goes for the audio input and output wires, connect one end to amp then other behind the cd player! make sure to leave anough slack to b able to connect to amp! hope this has been helpful :)

this kind of problems usually happen when the amp is not getting enough current to power up the  
 amp. the moment a loud low frequency hits the amp it fails. cud be ur power unit not giving enough power to the amp or u have a loose connection somewhere on ur power line. besides 8gauge is a bit small. try using about 4gauge. should have good ground too. they draw large current so ur battery should be in top condition as well. 

Yes

The yellow wire does not get used unless you have a power antenna to hook it to. The red wire is suppose to be hooked to the wire that was used as power for the stock stereo, so it turns on and off with the key. If you have it hooked to constant power, it has power coming to it even when it's turned off. That and the fact that you may need a better ground is most likely the reason you're getting the moise even when turned off. You may also want to check your speaker connections.

What kind of "Clips" did you put on? They may be causing too much resistance and preventing the amp from getting the current it needs. Double-check with a voltmeter that you are getting at least 12 volts at the amp power connections and make sure your ground lead is as short as possible and connected to solid metal of the vehicle's chassis.

Make sure the amplifier is turning on. Remember ther is three wires that power the amp Battery constant, Ground which in a fiberglass boat run ground to battery not motor, Plus make sure the remote wire is hooked to power, generally it is switched power. But if the amp is not turning on temporarily hook remote and power together to battery and see if the amplifier turs on. Second be sure you have a good set of RCA cables hooking the radio to the amp. And finally check and make sure the gain is turned up on the amplifier.