The Diesel Page Forums

2019 - TDP's 23rd Anniversary
What's New | Feature Articles | Product Reviews | Member's Area | Free Forum Registration
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | The Diesel Page - Publications

Go Back Forums > 2001-2019 Chevrolet & GMC 2500HD/3500 Light Trucks > 2500HD/3500 HD Trucks & Drivetrain
Register FAQ Members List Photo Album Mark Forums Read

2500HD/3500 HD Trucks & Drivetrain Discussion Forum for the 2001 & newer 2500HD/3500 Trucks, Transmissions & Drivetrain

Thread Tools Display Modes
Old 02-08-2019, 09:02 PM
PanamaRed PanamaRed is offline
Join Date: Feb 2019
Location: US Ohio
Posts: 1
Default Power Steering/Brake hydroboost ?

04 2500 ,, had to slam on the brakes to avoid a crash and lost most of the power steering fluid within a couple miles, pump was starting to whine,,, any idea what to look for? Not too familiar with how hydroboost system works
Reply With Quote
Old 02-08-2019, 09:59 PM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Join Date: Apr 2001
Location: CA
Posts: 12,325

Welcome aboard!

The system isn't too complicated. The PS pump supplies fluid to the hydroboost unit, and the hydroboost unit distributes fluid to the brake assist, then the steering. Both have a return line back to the pump reservoir. A rapid fluid loss is almost always a line leak, likely on the pressure side if the loss is very rapid, or a return line if it is less rapid (if that makes sense). There is one pressure line from the PS pump to the HB unit, and one pressure line from the HB unit to the steering gear. In any case, an external leak is much easier to identify than most issues that cause problems. Just follow the leak.
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 10:58 AM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 1996-2019 by - All Rights Reserved