Useless Information

[gooffeyguy]

Finally got the front finished and then began tackling the rear. I'm very weak and doing just one side is exhausting these days even though it only takes a few minutes.

Lifted the RR caliper off the bracket and saw that the rubber around the piston has a hole in it but is not leaking. Piston compressed smoothly. Outside pad depth on that side just under 7mm after 34K miles. The LR caliper piston had some initial resistance and then compressed smoothly. Pads on this side are just over 7mm for the outside ones.

Could not get the rear rotors off to inspect the parking brake shoes so we decided to skip it, didn't want to spend anymore money or down time on a new puller set. So we got it all back together and went to bleed the brakes. No joy! The RR bleeder was stripped and even the line wrench was slipping off of it. Vise grips didn't work with the caliper on the car.

So I just decided to let her sit for another couple of weeks and buy new rear calipers, pads, parking brake shoes and maybe the parking brake cables and actuator. Not happy with another un-planned expense when we should be sitting on the beach in Daytona. Anyhow, it's the Lord's money and the truck needs to be fixed right to be up for any task we ask of it.

Not liking having her down during hurricane season either. Hmm, might pull that caliper to get the bleeder replaced until the new ones show up. Thoughts?

The rear brake calipers are twice as expensive as the front as GM wants a core charge of $40 per side; none required for the front.

Pics or it didn't happen, lol

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[swathdiver]

Pics or it didn't happen, lol

Well, the RR caliper is drying in the oven but I did take photos of some of the front brake parts.

The OE calipers were Australian, from a company called PBR Brakes USA. The new replacement Calipers and Rotors are Akebono. The new OE hoses are Flexitech.

The front and rear pistons are the same. Checking with Rene to see if the seals and gaskets are as well. When the RR caliper comes out of the oven I'll look for makers marks.

 

[gooffeyguy]

I have PBR branded calipers on my mustangs

 

[swathdiver]

I have PBR branded calipers on my mustangs

No complaints, they lasted 150K miles and stopped 13K pounds like it was nothing.

 

[DRKN57]

No complaints, they lasted 150K miles and stopped 13K pounds like it was nothing.

That’s good use!


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[swathdiver]

Still sitting in the driveway on stands waiting for a part. Should arrive today and then I'll rebuild the last rear caliper and put everything back together over the weekend and get the brakes bled, hopefully they work!

GM does not list any parts to rebuild the rear aluminum calipers. But the parts to rebuild the fronts are exactly the same. So I have rebuilt one and waiting on a new bleeder screw (fine thread) to rebuild the other and get this thing back on the road.

Quite busy with home, kids, other car repairs and work so my time spent on here will be limited for a while. Haven't forgotten about you Okeechobee boys, I'll ring you all up soon when my truck has its wheels on again!

 

[Tonyrodz]

Still sitting in the driveway on stands waiting for a part. Should arrive today and then I'll rebuild the last rear caliper and put everything back together over the weekend and get the brakes bled, hopefully they work!

GM does not list any parts to rebuild the rear aluminum calipers. But the parts to rebuild the fronts are exactly the same. So I have rebuilt one and waiting on a new bleeder screw (fine thread) to rebuild the other and get this thing back on the road.

Quite busy with home, kids, other car repairs and work so my time spent on here will be limited for a while. Haven't forgotten about you Okeechobee boys, I'll ring you all up soon when my truck has its wheels on again!

Take it nice n slow James. Just pace yourself buddy. We're not as young as we used to be lol.

 

[swathdiver]

Take it nice n slow James. Just pace yourself buddy. We're not as young as we used to be lol.

Tell me about it Tony! Saturday wiped me out and the girls did most of the work! They changed the oil in the other two cars, a hub in the Montana and helped me finish up the truck's brakes.

Finished burnishing the brakes just after midnight last night. Took the family to dinner tonight and all seems well with the brakes. During the draining out of the old fluid and refilling with new, the ABS and manual bleed processes, we went through 5 quarts of brake fluid! Truck stops as before, pedal feels the same, pressure is still in the mid 800s but only takes in the 60s to slow the truck.

I'll come back in a few days or weeks with part numbers and torque specs like was done for the fronts for those who come along after us. Wife is now chomping at the bit for a Yukon Denali! One daughter should have enough money saved to buy a 6.2 NHT Sierra by December or January. These are hard to come by, especially in SLE trim, so it may take a few months to fine the right one. It's gotta have the trailer brake controller too! Same with the Denali!

 

[swathdiver]

Oh, that's the current supplier for GM OE rotors. Don't recall maker's marks on the ones from last year but will check again before using them as weights.

 

[swathdiver]

I'll come back in a few days or weeks with part numbers and torque specs like was done for the fronts for those who come along after us.

For anyone coming along later on and needs some part numbers:

Brake Caliper, Rear, Left = 84191288
Brake Caliper, Rear, Right = 84191287

I did not buy these new calipers but am providing the numbers for reference.

The pistons come 1 to a box, the seal and boot kit will service two pistons. The bleeders for the rear aluminum calipers use a fine thread whose part number is provided below.

Brake Caliper, Piston = 15125962
Brake Caliper, Seal and Boot Kit = 23276875 or 179-2262
Brake Caliper, Rear, Bleeder Screw = 88967108

These are GM Original Equipment numbers. Many thanks to Rene for confirming these numbers and providing the GM pricing for comparison. @915_Tahoe

The brake caliper bolts are 13mm and the slide pins take a 20mm wrench. The brake caliper bracket bolts have 18mm heads. The caliper bracket is supposed to have some loc-tite on it and torqued to 122 FT LBS, while the caliper bolts get torqued to 28 FT LBS. When torquing these down, you have to hold the slide pin with the 20mm wrench, but DO NOT let the wrench touch the caliper while tightening or torquing as vibration may ensue while breaking. I do not understand why, that's just what the manual says. The Brake Hose to Caliper Bolts get torqued to 30 FT LBS and has an 11mm head.