99 jimmy brake problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

vanislejimmy · 09-03-2008, 10:48 PM

I own a 99 jimmy and just finished doing the rear brakes. The passenger side brake pads were completely worn down, and the driver side had some life left on them. I didn't think much of it at the time, but after replacing the rotors, calipers, and pads the passenger side caliper won't release. I'm not sure what the cause is, but I need to get it fixed right away. Anyone have an idea what's wrong?

vanislejimmy · 09-03-2008, 10:56 PM

I know this is in the wrong forum, but I'm in a rush to get it fixed and most people seem to hang out here. I have a 99 jimmy with 4 wheel disc brakes. I just finished doing the rear brakes. While doing them I noticed that the right hand pads were completely worn out and the left side still had quite a bit of life left on them. I replaced the pads calipers and rotors. Bled them and took it for a test ride. The right side caliper won't release for some reason. I tried bleeding them again and that did not help? I think whatever is wrong has been this way for a little while as the old ones were worn unevenly. I need to get this fixed by tommorrow afternoon so any thoughts will be helpfull.

**Boog** · 09-03-2008, 11:06 PM

One of the rear calipers may be sticking causing the other side to do all the braking. It may be noticeable when driving as it should pull to one side when stopping or one wheel might lock up. You can buy a caliper rebuild kit for it but you'd be ahead to buy a remand caliper loaded with new pads and just swap them out, bleed and go.

vanislejimmy · 09-03-2008, 11:15 PM

Everything is brand new on both sides. The driver side works fine. The passenger side caliper won't open up at all. I've got both wheels off right now and without the brakes on the drivers side turns by hand (when in neutral) and the passenger side won't turn at all. When the brakes are on both sides don't turn.

Keep on Trucking · 09-03-2008, 11:42 PM

Can you exchange the one in question since they are new. Does it have the ebrake built into it? It could be hanging?

umwtnt · 09-04-2008, 05:24 AM

Check your rubber brake lines. They are known to collapse internally and not allow fluid to return, thus causing the caliper not to open. It's best just to replace both of them.

**steelhorse** · 09-04-2008, 06:30 AM

Ditto for the hose.

Huck · 09-04-2008, 07:41 AM

This is part of the reason GM only went with rear disc's on trucks for a few years and now are back with drum brakes. If the new caliper wouldn't release when pressure is off, I suspect a line, check valve, proportioning valve issue.

**steelhorse** · 09-04-2008, 07:55 AM

Mash the pedal and see if it sticks.If it does open the bleeder, if it frees up it is the hose if it deasnt it is a caliper problem

68gmsee · 09-04-2008, 09:21 AM

Quote:

Originally Posted by umwtnt

Check your rubber brake lines. They are known to collapse internally and not allow fluid to return, thus causing the caliper not to open. It's best just to replace both of them.

This actually happened to me many years ago. Old age and brake fluid makes them swell and with the power brakes, there's enough pressure to force fluid through but the residual is not strong enough to return the fluid.

On mine the rear axle brake hose was bad. I went ahead and replaced all rubber lines-- front and back.

vanislejimmy · 09-04-2008, 09:29 PM

Thanks guys, turns out it was the rubber hose

**truckdude239** · 09-05-2008, 04:56 PM

i just merge your other post into this one please dont double post

09-03-2008, 10:48 PM	#1
vanislejimmy Registered User Join Date: Jan 2007 Location: Vancouver Island, British columbia Posts: 138	99 jimmy brake problems I own a 99 jimmy and just finished doing the rear brakes. The passenger side brake pads were completely worn down, and the driver side had some life left on them. I didn't think much of it at the time, but after replacing the rotors, calipers, and pads the passenger side caliper won't release. I'm not sure what the cause is, but I need to get it fixed right away. Anyone have an idea what's wrong?

09-03-2008, 10:56 PM	#2
vanislejimmy Registered User Join Date: Jan 2007 Location: Vancouver Island, British columbia Posts: 138	brake problems I know this is in the wrong forum, but I'm in a rush to get it fixed and most people seem to hang out here. I have a 99 jimmy with 4 wheel disc brakes. I just finished doing the rear brakes. While doing them I noticed that the right hand pads were completely worn out and the left side still had quite a bit of life left on them. I replaced the pads calipers and rotors. Bled them and took it for a test ride. The right side caliper won't release for some reason. I tried bleeding them again and that did not help? I think whatever is wrong has been this way for a little while as the old ones were worn unevenly. I need to get this fixed by tommorrow afternoon so any thoughts will be helpfull.

09-03-2008, 11:06 PM	#3
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: brake problems One of the rear calipers may be sticking causing the other side to do all the braking. It may be noticeable when driving as it should pull to one side when stopping or one wheel might lock up. You can buy a caliper rebuild kit for it but you'd be ahead to buy a remand caliper loaded with new pads and just swap them out, bleed and go. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

09-03-2008, 11:15 PM	#4
vanislejimmy Registered User Join Date: Jan 2007 Location: Vancouver Island, British columbia Posts: 138	Re: brake problems Everything is brand new on both sides. The driver side works fine. The passenger side caliper won't open up at all. I've got both wheels off right now and without the brakes on the drivers side turns by hand (when in neutral) and the passenger side won't turn at all. When the brakes are on both sides don't turn.

09-03-2008, 11:42 PM	#5
Keep on Trucking Registered User Join Date: Jul 2005 Location: League city/Houston Posts: 163	Re: brake problems Can you exchange the one in question since they are new. Does it have the ebrake built into it? It could be hanging? __________________ 1970 4X4, Big block 454, 4 speed, vintage air, Mahagony wood bed, Tilt, tach. Can have new owner for the right price. "Life is tough, its tougher if you are stupid" (John Wayne) My buddys truck for sale here. http://67-72chevytrucks.com/vboard/c...p?product=2676

09-04-2008, 05:24 AM	#6
umwtnt Registered User Join Date: Feb 2008 Location: Williamsburg, Va Posts: 226	Re: brake problems Check your rubber brake lines. They are known to collapse internally and not allow fluid to return, thus causing the caliper not to open. It's best just to replace both of them. __________________ The more I learn, the more I find out I don't know. 69 Chevy SWB w/67 front end 4 wheel discs 468 BB 700R4 Bagged Coming around slowly

09-04-2008, 06:30 AM	#7
steelhorse Senior Member Join Date: Apr 2008 Location: Franklinton NC Posts: 1,309	Re: brake problems Ditto for the hose.

09-04-2008, 07:41 AM	#8
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: brake problems This is part of the reason GM only went with rear disc's on trucks for a few years and now are back with drum brakes. If the new caliper wouldn't release when pressure is off, I suspect a line, check valve, proportioning valve issue.

09-04-2008, 07:55 AM	#9
steelhorse Senior Member Join Date: Apr 2008 Location: Franklinton NC Posts: 1,309	Re: brake problems Mash the pedal and see if it sticks.If it does open the bleeder, if it frees up it is the hose if it deasnt it is a caliper problem

09-04-2008, 09:29 PM	#11
vanislejimmy Registered User Join Date: Jan 2007 Location: Vancouver Island, British columbia Posts: 138	Re: brake problems Thanks guys, turns out it was the rubber hose

09-05-2008, 04:56 PM	#12
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: 99 jimmy brake problems i just merge your other post into this one please dont double post __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube Last edited by truckdude239; 09-05-2008 at 04:56 PM.



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