Shock suspension hi i have a 2004 gmc envoy sle and when i drive it it makes a metal hitting noise in the back but i know its not the shocks every bump i hit i hear this banging metal sounds also when going over uneven pavement do you have any idea of what it might be?

SOURCE: 2002 gmc envoy front suspension noise

Thanks for providing that information.
At 65K I would first suggest changing shocks. Yes, that is enough mileage to have them beginning to get "softer" which will increase suspension travel and noise.
Even though they may test good (usual test is jumping on the bumper to see how it responds after bouncing) but that really doesn't apply to shock/strut combinations.
I would suggest a higher then factory grade replacement shock. Do realize 60% of the weight for that vehicle is in the front.
Next, there is always some, what they call "spring seating" as a vehicle gets older. You will notice it more when the suspension is in a turn, going over a bump. The spring moves / rotates in the seat, and you will hear a sometimes loud popping or clicking noise.
Bushings are probably best left to the professionals, unless you happen to have a well equipped shop at home.Same goes for the struts. You will need a good spring compressor to be able to change them, and you will need to have an alignment done after changing them. Doing the bushings at the same time is easy once the struts are out.

Since it is 4WD you mine want to test the front CV joints also. If you have access to a lift, put it in the air so all 4 wheels are off the ground, and running it. Listen to each front wheel to see if you can hear any CV noise. Please be very careful doing this. Doing it incorrectly can result in injury.

What you want to do more then anything is take this a step at a time. When you hear a noise inside a car, it can sound like it is coming from one place, and you can find out later, it is somewhere else.

I think a Haynes manual is going to be a good guide for you on this problem.
Take you time, and be very careful doing this kind of work. If at anytime you are not 100% comfortable doing the work, consult a professional.
Sorry I can't be more help as a simple fix, but I'm limited diagnosing any further without have the vehicle at my access.

SOURCE: my 99 GMC suburban 4&4, has this clunking

Inspect rubber bushings in the suspension, it is at the age where they will start to wear out. Also inspect the ball joints, these can make a lot of noise when going out.

SOURCE: Noise driving over rough road worse after new links,struts,shocks

Do not heat or bend any suspension parts. Big no-no. If it's all touching and out of whack, check for possible bent frame. Body-shop that did the past work might have overlooked the frame being bent. All measurements start with a straight frame.Then go after the individual hitch and sway bar.

Testimonial: ""All measurements start with a straight frame". thank you for that excellent advice. "

SOURCE: 2003 envoy sways{rocks back and forth} going down

Performance shocks could help. Id have the sway bar links checked for damage before buying shocks

SOURCE: rattling like metal to metal in rear of car when i hit bumps in2003 envoy

Most likely are the sway bar end links have gone bad, these fail quit e often.