Hummer H1 knocking Noise

[NoMoGMPG]

Originally Posted by spacom

I also seem to get a front brake grinding noise from the front when hot but seems to go when I brake !.

You need to check your caliper bracket mounting bracket and your axle bolts. It sounds like the bolts have backed out. Major brake damage can result.

[spacom]

I have checked the calipers I thought it must of been the cheap pads I bought at the auto store so I put some better ones in carbon metallic,
took for run and when I came back to my garage I heard what was like a brake shudder noise,
and I also have more rocking even with the slightest braking this was since I head the loud crack noise,
But is it normal to have noises when in low gear when I decelerate like transmission play but I never noticed this befor as I always have it in drive
gear.

[Yetti]

are you getting side to side rocking? if so I would check your swaybars. you could have snapped one and now its flopping around in its mounts