1994 – 1999 OBS GM Truck Rear Drum Brake Wheel Cylinder Replacement (Chevy & GMC)

1994 – 1999 OBS GM Truck Rear Drum Brake Wheel Cylinder Replacement (Chevy & GMC)

This video goes over the repair / replacement procedure for the rear drum brake wheel cylinder on a old body style (OBS) GM truck. The vehicle shown is a 1999 Chevrolet 2500 class 3/4 ton truck with 13″ rear drum brakes, but the the approach would be similar for all GM truck models of the mid to late 1990s (1994 1995 1996 1997 1998 99) across Chevrolet, GMC, and Holden. So Cheyenne, Suburban, Silverado, Sierra in the C/K 2500 and 3500 range would likely have this style of rear drum brakes. The wheel cylinder is the same part for either side of the truck.

ACDelco part number: 172-1215 for this wheel cylinder on affiliate link at eBay: https://ebay.us/FmhsSa or Amazon: https://amzn.to/36GxSeK

GM part number: 19213345 for this wheel cylinder on affiliate link at eBay: https://ebay.us/gduTl8

And if I’ve saved you some $$ here, consider some coins for the coffee tip-jar! https://ko-fi.com/drshock

0:00 – Repair overview
1:41 – Disassembly
8:38 – Replacement part numbers
9:58 – Installation tips


Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is” information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.



Jack Skellington says:

10:0910:16 Words of absolute wisdom. Thank you man!

Ariel Luna says:

If one is leaking and I have to replace it, would you recommend replacing both?

MickeySlim says:

im pretty sure its the same concept but my trucks inside of the brakes looks nothing like the one in here mines a 97 c1500 5.0 305 2wd Extended crew cab and mine looks nothing like this one as in how the springs work and where they are and the 2 metal pieces are non exsistant and my shoes touch the wheel cylinder to act like the metal pieces he reused in this video Im bout to wing this shit lol take pics and try and rememeber if i fuck sum up i got a mechanic that will help me but he told me i could do it by myself and he understood why i wanted him to do it so its right quick and safely done but im bout to dive in this shit and its my first time ever doing this job

Chris Milby says:

Great video for those of us who just needed to replace the wheel cylinder, absolutely garbage for those of us trying to rebuild the entire brake drum and springs

T G says:

Thank you Dr. Shock

te066538 says:

Excellent presentation! Thanks!

country R says:

Hey thanks for making this video it was really helpful and I appreciate your hard work to get the video

Least Trending says:

How can i tell if i have a 10 in or 11 inch hub

Ethan Roten says:

do you have to take the springs off

DIY Speed says:

Do you have any tips for removing a stuck drum on one of these k2500s?

Robert Nolan says:

Is there a left and right cylinder

Damon Ens says:

How do you know if you have 11" brakes or 13"?

Juan Gomez says:

Very helpful thank you

Zack Mann says:

Is that the driver or passenger side

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