Question about GMC Sierra 1500HD

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Any help in getting the T55 bolts loose on the rear brake caliper on 2003 GMC Sierra? Tried applying penetrating oil but no luck.

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  • Expert
  • 49 Answers

U have to use heat. They are lock tited on

Posted on Apr 19, 2013

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6ya6ya
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Posted on Jan 02, 2017

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Junoon007
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SOURCE: How do you compress rear brake caliper?

Dear Sir/madam,

The pistons on the rear brake calipers SCREW in to the caliper. There are notches on the inner edge of the piston face. engage the notches with a large needle nose plier or a large flat washer and turn clockwise (as you face the piston) to turn the piston in.
There is a special tool that is available at your local autoparts store that is absolutely necessary and will save you a ton of time and aggravation. Using a needle nose plier or washer does not allow you to apply enough pressure unless your are the incredible hulk.

thanks
Good luck

Posted on Oct 24, 2008

  • 1861 Answers

SOURCE: 2003 Toyota Sequoia Rear Brake Rotor Removal

You need to go into the access hole in the rotor and back off the park brake shoes, which are located inside the rotor.

Posted on Jan 06, 2009

USfalcon
  • 175 Answers

SOURCE: 2003 sierra rear brake rotors

there is many kind of brake system of ur truck here i will send u everything about the brake and i hope its help

Rear Brakes JC3

Rotor Discard Thickness* 18.50 mm/0.728 in Rotor Minimum Allowable Thickness After Refinish 19.0 mm/0.748 in Rotor Thickness (new) 20.0 mm/0.787 in Rotor Maximum Allowable Lateral Runout 0.05 mm/0.002 in Rotor Maximum Allowable Scoring 1.50 mm/0.059 in Rotor Maximum Allowable Thickness Variation 0.025 mm/0.001 in
Rear Brakes JC4

Rotor Discard Thickness* 28.50 mm/1.122 in Rotor Minimum Allowable Thickness After Refinish 29.0 mm/1.142 in Rotor Thickness (new) 30.0 mm/1.181 in Rotor Maximum Allowable Lateral Runout 0.05 mm/0.002 in Rotor Maximum Allowable Scoring1 .50 mm/0.059 in Rotor Maximum Allowable Thickness Variation 0.025 mm/0.001 in
Rear Brakes JH2

Rotor Discard Thickness* 28.50 mm/1.122 in Rotor Minimum Allowable Thickness After Refinish 29.0 mm/1.142 in Rotor Thickness (new) 30.0 mm/1.181 in Rotor Maximum Allowable Lateral Runout 0.05 mm/0.002 in Rotor Maximum Allowable Scoring 1.50 mm/0.059 in Rotor Maximum Allowable Thickness Variation 0.025 mm/0.001 in
Rear Brakes JH6

Rotor Discard Thickness* 27.50 mm/1.082 in Rotor Minimum Allowable Thickness After Refinish 28.0 mm/1.102 in Rotor Thickness (new) 29.0 mm/1.141 in Rotor Maximum Allowable Lateral Runout 0.05 mm/0.002 in Rotor Maximum Allowable Scoring 1.50 mm/0.059 in Rotor Maximum Allowable Thickness Variation 0.025 mm/0.001 in
Rear Brakes JH7

Rotor Discard Thickness* 28.5 mm/1.122 in Rotor Minimum Allowable Thickness After Refinish 29.0 mm/1.142 in Rotor Thickness (new) 30.0 mm/1.181 in Rotor Maximum Allowable Lateral Runout 0.05 mm/0.002 in Rotor Maximum Allowable Scoring 1.50 mm/0.059 in Rotor Maximum Allowable Thickness Variation 0.025 mm/0.001 in
* All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this Specification. After refinishing the rotor, replace any rotor that does not meet the minimum or discard thickness specifications.

Posted on Mar 15, 2009

  • 4 Answers

SOURCE: REAR BRAKE DRUM WON,T COME OFF

Make sure the wheel turns and adjuster backed off . If you can see a Countersunk screw in the face of the hub remove it.  If hitting it fails , usually you can see two small 8,10 or 12 mm holes in the face of the hub . Find the correct bolts and screw them into the the hub , it should force the the drum to pop off . What car is it , and does it have tapered wheel bearings on the outside of the drum?

Posted on Apr 11, 2009

  • 5 Answers

SOURCE: removing rear brake pads on gmc yukon xl 2000

take a pair of pliers and hold the inter side of the guide and turn the bolt. the bolts is only 8mm w x 25mm L. this will allow you to remove the calipers.

Posted on Jul 15, 2009

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1 Answer

04 gmc sierra,quad cab 4x4,front brake locked up and abs light came on,brakes were smoking


Hey Cameron - Usually (Not a Law) it would mean the Caliper is seized. There is a caliper piston - when you press the brake, that piston pushes out, forcing the brake pads to put pressure on the rotor. Your brake fluid is hydraulic fluid - when you take your foot off the brake/it retracts the caliper piston releasing the tension.
There are definitely other things it could possibly be - but if you can get the brake line OFF the caliper housing (attached to the wheel's rotor/where your wheel studs come out of), there will not be any more pressure. I would recommend disconnecting the brake line and applying a penetrant oil to the housing/anywhere you can spray it. (((tip of the day - spray it with brake cleaner first. Douse it. Brake Cleaner - stronger the better - is a very strong solvent - it breaks rust up extremely well, believe it or not - the only downfall is it drys fast - leaving the material open for more corrosion/the remedy - try some brake fluid, let it dry off, then hit it with a good penetrating oil - Get Some, one work search for that. Really effective and non-toxic. Once it's soaked and the brake line is off - leave the caliper in place and see if you can get the piston to go back in enough to get the retaining bolts off and get it off the rotor. E bay is awesome for used parts - but I have a code for Advance Autos coast to coast that isn't advertised that would really help out if you chose to replace new. On some calipers - you can rebuild them (new caliper piston and o-rings that seal the components) but usually a used caliper off of E bay with free shipping is cheaper than the kit. Just an FYI.

Here's the standard procedure (see below).



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I've seen a locked caliper more than once. The piston usually gets corrosion in between itself and the cylinder it slids in and out of. Eventually leading to a seized caliper piston either open (when you're lucky) or upon coming to a stop - it will fail to release and go back in. If you get any other information contact me and I'll gladly advise to the best of my ability.

Thanks & All The Best, Justin McCartney

Dec 26, 2015 | GMC Cars & Trucks

1 Answer

How do I change a front wheel bearing on a 2004 gmc sierra 4x4


The hub, bearing, and ABS sensor are a single unit on this vehicle. You need to remove the wheel, brake rotor & caliper [don't disconnect the brake hose from the caliper, just support it out of the way] and then remove the large nut that holds the axle shaft in the hub assembly. Once you have all this loose or removed you'll find that the hub is held on with 3 fairly large capscrews that come in from the backside of the steering knuckle that the hub attaches too. Assembly is just the reverse of the process. Make sure you tighten all the bolts and nuts securely with a torque wrench [I don't have the torque spec's here] I apply threadlocker to all of these bolts as they are vital to safety. I only use OEM hubs on these as I've had the best luck with them and the ABS sensors inside of them.

Jun 17, 2010 | 2004 GMC Sierra 1500 Crew Cab

1 Answer

How to take front rotor off of 2004 gmc sierra . I have caliper and rotor bracket off but still is tight.


if the caliper and bracket are off and all you have is your rotor get a sledge hammer and hit in between the bolts coming through the rotor, while you give it a smack turn the rotor and hit a different spot in between the lugs. also try spraying penetrating blaster this can help free it up. good luck

Apr 16, 2010 | 2002 GMC Sierra

1 Answer

I need to replace the right side hub/bearing assembly on my 1995 GMC K1500, the 3 bolts holding the old assembly in are corroded on, what is the easiest way to get them off. It has been suggested to me to...


Use a propane or a mapp gas torch and heat them up and give them a little rap with a ball peen hammer. Then oil them up with some penetrating oil, they should break loose. Heat the bolt more than the surrounding structure. When they glow red, hit them with a hammer, not hard, just enough to break the corrosion inside the threads loose. Penetrating oil is your freind. Use it liberally and maybe let it set for a few minutes to get into the threads. Good luck.

Apr 16, 2010 | 1995 GMC Sierra

1 Answer

How to replace rear brakes in 2005GMC Sierra?


jack up truck support it remove tire you should see the caliper,on the back side you will see two small bolts lossen the bolts remove it might require some prying support the caliper,check the rotor if has grooves in it it should be turned. use a c clamp to force the piston back in the caliper be careful of the rubber seal put the new pads on reinstall the caliper tighten the bolts start the truck pump the brakes a few times go back check for leaks if none put tire back on remove support lower to ground test drive

Nov 02, 2009 | 2005 GMC Sierra

1 Answer

How to replace 99 gmc 3/4 tom brake rotors


Removal & Installation
  1. Remove 2/3of the brake fluid from the master cylinder.
  2. Raise and support the vehicle.
  3. Remove the tire and wheel assembly.
  4. Remove the front wheel hub extension (dual wheel vehicles only).
    • Insert a drift or large screwdriver through the brake caliper into one of the brake rotor vanes in order to prevent the rotor from turning.
    • Mark the relationship of the front wheel hub extension to the hub
    • Remove the front wheel hub extension bolts
    • Remove the front wheel hub extension from the vehicle. It may be necessary to tap around the perimeter of the hub extension with a rubber mallet to loosen it from the hub
  5. Mark the relationship of the rotor to the hub.
  6. Remove the caliper and mounting bracket as an assembly.
  7. Hang the caliper and the mounting bracket assembly from the suspension using mechanics wire.
  8. Remove the rotor.
  9. If the rotor is difficult to remove due to corrosion in the hub area use the following procedure to remove the rotor (25 series only).
    • Clean all the surface areas and the threaded holes of contamination
    • Generously apply penetrating oil or the equivalent to the hub/rotor area
    • Insert (2) M10 x 1.5 bolts (jack screws) into the threaded holes of the rotor
    • Tighten both bolts evenly to force the rotor from the hub.
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To install:
  1. Clean all rust and contaminants from the both side of the rotor and the hub flange.
    NOTE If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.

  2. Install the rotor.
  3. Install the caliper and the mounting bracket as an assembly.
  4. Install the tire and wheel assembly.
  5. Remove the safety stands.
  6. Lower the vehicle.

Oct 25, 2009 | 1999 GMC Sierra

1 Answer

Do you need to take the axles out to access the brakes on a 1998 GMC sierra 2500


No you don't. All you need to do if you have disc brakes is take the wheel off and then take the two bolts off holding the brake caliper on, and you have it off, thn you can replace the brake pads compress the piston on the caliper, put it back on the rotor, put the wheel back on and your done. Check the rotors out to see if they are smooth and not too much of a lip on the outside of the rotors. If they are too rough, the you replace them by taking too more additional bolts that hold the bracket the brake caliper bolts two(2 more bolts) and then tap the rotor loose with a hammer, replace.

I have replaced the front disc brakes on quite a few vehicles and just replacing the pads when you know what you're doing will take you 30 minutes tops. Add another 10-15 minutes if you replace the rotors.

Good luck

Oct 08, 2009 | 1998 GMC Sierra

1 Answer

Proceedure for replacing 2003 gmc sierra brake back plate


I have a 2000 Sierra it has a one piece backing plate that was half rotted. I removed all hardware( caliper etc ) cut off old plate. I then bandsawed new one piece plate in half , attached two overlap tabs on the halves, and sprayed the outside surface with stoneguard spray to protect them. When you install the hardware the two halves will be held securely and the stoneguard will help to keep them from rotting off again.
Or...... do what the gmc engineers do , remove the rear differential cover drain the fluid, pull the axle shafts and replace the plates as one piece. About $100 extra in oil and gaskets. Thanks GMC..

Apr 14, 2009 | 2003 GMC Sierra 1500

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