I've had the same problems. I bought the 98 Sierra 1/2 ton 2wd used in May of 02. The truck has been great except for the brakes. I replaced both front rotors due to extreme run out, new front pads, new rear drums due to exteme run out, and new rear shoes. The problem seemed to be fixed, but now its back (after only 6k). I spoke to my local GM dealer about the problem, they told me about some problems with 95-98 GM fullsize truck and Suburbans. They told me that the brake lines were prone to failure and that on some trucks the front calipers could contact the spindle causing hanging and poor performance.
I have ordered new brake lines from Earls Performance Plumbing (a Holley Performance company) through Summit Racing. I'll reply to see if it works.
I have a 98 SLE 4X4 and just had new pads put on for the first time in the front at 86,000. Looks like I am very lucky.
I have a 97 Sierra with 105,000 miles. Five brake jobs, one new master cylinder and 2 new calipers later and my brakes still don't seem right. Seems like the rotors get to hot and warp, and now I've got a nagging little popping noise a about 5 miles per hour when applying the brakes that is eluding me. My next truck is soon to be a Toyota.
How do I remove the rear drum on a 1998 GMC Sierra Pick Up-the drum appears to be rusted and I am unable to get at the pads??
My front-left brakes were touching metal. I opened up the rear and my drum wheel cylinder were not working.
BTW, to remove the drums, you need to release the parking/emergency brakes.
I have +400,000 km on my '98 Z71.
It has been an awesome truck.
Overhauled the tranny at 150,000km, was pulling too heavy a trailer in OD.
No brake issues, the rest of the truck is untouched.
I have a 98 Sierra 2wd. As far as the brakes go, I adjusted the back ones up and haven't had a problem since.
I own a '98 GMC Sierra 1/2 ton, 146K miles.
My rear brakes are probably in need of replacement. I jacked up the rear this morning and after almost an hour, the drums will not come off. I tried squirting PB blaster in the crannies and jammed a couple of screwdrivers between the backing plate and the drum, it moves freely at the wheel studs, but it is rusted to the center of the drum. I even gave a few good raps to the center with a BFH, nothing. I think the shoes are most likely caught behind a worn lip on the drum surface also.
Any ideas? I think I may have to bite the bullet and take it somewhere.