Question about 2004 Chevrolet Silverado

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How to identify rear caliper type on 2005 2500HD Silverardo

How do you identify if you have a JH5, JH6, or JH7 rear caliper on a 2005 2500HD Silverado?

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Try to find the vehicle build sticker, either on a door jamb, under the hood, in the glove box, it will tell you there which brakes you have, or you can send me your full vin number and i can look it up for you (i have access to to GM's VIS system vehicle inquery system) it tells me exactly what options that truck was built with by the vin number.

Posted on Jun 29, 2009

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Having a problem reinstalling Rear Brake Caliper


I am not sure what kind of vehicle we are talking about. not all rear calipers have a screw type piston. to take a stab in the dark at your problem as far as lining up the caliper when reinstalling the bolts get both bolts started before tightening. If your problem is fitting the new pads and caliper over the rotary it would be necessary to push the piston further back into the caliper. if it is a screw type or just requires you to push it back always push or screw it back all the way till it bottoms out after installation it will take a couple pumps of the brake pedal to set everything back to specs. FYI when pushing the caliper back I do not like clamping the hose or backing off the bleeder screw to me it leaves to much room for erorr. i prefer to pop the master cylinder cap off and then just lay it on there then begain to back the pistons up that way there is no fliud loss nor a chance for air to breach the system. good luck friend.

Apr 10, 2014 | Cars & Trucks

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Avalanche minimum rotor thickness


Rear Brakes JC5/JH5 Utility Only
Rotor Discard Thickness* .............................. 28.50 mm (1.122 inch)
Rotor Minimum Allowable Thickness After Refinish ....... 29.0 mm (1.142 inch)
Rotor Thickness-new .................................... 30.0 mm (1.181 inch)
Rotor Maximum Allowable Lateral Runout ................. 0.05 mm (0.002 inch)
Rotor Maximum Allowable Scoring ........................ 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ........... 0.025 mm (0.001 inch)

Rear Brakes JH6
Rotor Discard Thickness * ............................. 27.50 mm (1.082 inch)
Rotor Minimum Allowable Thickness After Refinish ....... 28.0 mm (1.102 inch)
Rotor Thickness-new .................................... 29.0 mm (1.141 inch)
Rotor Maximum Allowable Lateral Runout ................. 0.05 mm (0.002 inch)
Rotor Maximum Allowable Scoring ........................ 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ........... 0.025 mm (0.001 inch)

Nov 12, 2013 | 2002 Chevrolet Avalanche

1 Answer

I need to change the pads on my 1991 Lebaron. Do the caliper pistons need to be turned as they're compressed like on some cars or can i just compress them without turning them?


The only time you need to turn and compress a piston on a caliper is on a vehicle that is equipped with rear calipers that also act as the emergency brake. These can be easily identified because the e-brake cable will attach to the caliper. The reason why they need to be turned is the parking brake works with a ratcheting mechanism inside of the caliper. The mechanism is overidden be turning the caliper and the caliper compresses.

Oct 25, 2010 | 1991 Chrysler LeBaron

1 Answer

Replace rear brake pads


Rear disc brake pads offer better performance and are not as affected by moisture like conventional brake shoe style brakes are. Rear disc brakes are similar to front disc brakes. The main difference is that rear disc brake systems must incorporate the emergency brake system. There are two methods widely used for the emergency brake with rear disc systems. The first system is a brake shoe inside the brake disc that is actuated by the emergency brake lever. The second is a screw style actuator inside the brake caliper. When activated the brake pads are forced into the brake disc and held tightly by the emergency brake lever.
READ COMPLETELY BEFORE STARTING
Step 1 - Identify Rear Disc Brake Components
rear_brake_pads.jpg Rear disc brake assembly includes; rear brake disc, rear brake pads, brake caliper mount and a caliper mounting screw. (Note: Some vehicles do not have the rotor mounting screw.)
Step 2 - Removing the Rear Brake Caliper Mount Bolts
rear_brake_pads_2.jpg To replace rear brake pads and rotors the rear brake caliper needs to be removed. First loosen the rear brake caliper mount bolts and remove them. Turn counter clockwise.
Step 3 - Lift Rear Brake Caliper from The Caliper Mount
rear_brake_pads_3.jpg After the caliper mount bolts have been removed, gently lift the brake caliper from the caliper mount. Inspect the caliper slides; they should move freely in the caliper mount. Remove rear brake pads and hardware.

Step 4 - Removing Caliper Mount Bolts
rear_brake_pads_4.jpg With a socket wrench or other appropriate removal tool, loosen the rear brake caliper mounting bolts. Remove bolts and lift the caliper mount and remove it from the vehicle. Remove the retaining screw from the disc mounting hole. Tap the rotor gently to release any rust that has accumulated between the rotor and bearing hub. Lift brake rotor from wheel hub holding on tightly, using both hands. You do not want to drop the rotor.

Step 5 - Removing Rear Brake Rotor
rear_brake_rotor.jpg Remove the retaining screw from the disc mounting hole, tap the rotor gently to release any rust that has accumulated between the rotor and bearing hub. Lift brake rotor from wheel hub, hold on using both hands and do not drop.

Step 6 - Install New Brake Rotor
rear_brake_rotor_2.jpg Check the new rotor against the old brake rotor to make sure they are the same size. Clean the mating surface on the wheel hub before the new brake rotor is installed. Reinstall rotor retainer screw.
Step 7 - Reset Rear Brake Caliper
rear_brakes_7.jpg Before new brake pads can be installed, the rear brake caliper must be reset. The reset tool winds the piston back into position so the new brake pads will fit. This style of brake caliper will not compress with a clamp tool; it can only be reset with the proper reset tool.
Step 8 - Reinstall Rear Caliper Mount and Install New Rear Brake Pads
rear_brake_rotor_3.jpg After the caliper has been reset, reinstall caliper mounting bolts and make sure the bolts are tight. Then match up the old brake pads to the new brake pads. They should be exactly the same except, of course; the old ones will be worn out. Check the new brake pads for proper fit and install any brake hardware that is required.
Step 9 - Remount Rear Brake Caliper
rear_brake_rotor_4.jpg Reinstall the brake caliper, align brake pad hardware and reinstall caliper mounting bolts. (Note: align the rear peg of the brake pad to the groove in the caliper piston.) Recheck and retighten all caliper and caliper mount bolts. Bleed brake system to relieve any air in the system. Before driving the vehicle, push the brake pedal down and let it up slowly. This operation forces the brake pads to travel to the brake rotors. DO NOT DRIVE VEHICLE until proper brake pedal operation resumes. When test driving vehicle listen for any unusual noises during the operation of the brakes.
WARNING! Always have the vehicle under inspection on level ground, in park with the emergency brake on. Always wear protective eyewear, gloves and necessary clothing before inspection or work begins. Never crank an engine over when anyone is near the battery or engine. Always have an operational fire extinguisher close by, obey all first aid instructions in the event of an injury. Never stand in front or behind a vehicle when cranked over or running. When engine is cranked over keep hands and clothing away from rotating components. Never move a car without proper brake pedal operation.

Jun 01, 2010 | 1995 Saab 900

2 Answers

How to compress caliper to fit new pads


Use a "C" clamp. Position on the piston and when you tighten it up it will compress the piston in the caliper. Remember to loosen the cap to your master cylinder, as you will be forcing brake fluid back into it. When you remove the "C" clamp the caliper will stay open long enough to align on the rotor.

Jul 14, 2009 | 2000 Volkswagen Beetle

1 Answer

Need the correct torque specs for 2004 silverado 1500 calipers


  • Tighten the 2 brake caliper mounting bolts to 108 Nm (80 ft. lbs.) . Caliper Mounting Bracket to Knuckle, Front (15 series) 175 Nm (129 ft. lbs.) Caliper Mounting Bracket to Knuckle, Front (25/35 series) 300 Nm (221 ft. lbs.) Brake Caliper Mounting Bolt Rear (15 series) 42 Nm (31 ft. lbs.) Brake Caliper Mounting Bolt Rear (25/35 series) 108 Nm (80 ft. lbs.) Caliper Mounting Bracket Bolt Rear (JC5/JH5) 200 Nm (148 ft. lbs.) Caliper Mounting Bracket Bolt Rear (JH6) 165 Nm (122 ft. lbs.) Caliper Mounting Bracket Bolt Rear (JH7) 300 Nm (221 ft. lbs.) Caliper Mounting Bracket Bolt Rear (NYS) 200 Nm (148 ft. lbs.)
    hope this helps
  • Mar 28, 2009 | 2004 Chevrolet Silverado

    1 Answer

    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.

    Mar 15, 2009 | 2003 GMC Sierra 2500HD

    2 Answers

    Replacing lincoln LS rear brake pads. How do you adjust the electric parking brake so the new pads will fit?


    Screw in rear caliper pistons. Install pads and caliper,then ratchet up parking brake by hand, at caliper. No electric or cable issues involved

    Jun 29, 2008 | 2003 Lincoln LS

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