What did you do to your Sierra/Silvy today? - Page 4294 - Chevy and GMC Duramax Diesel Forum
General Discussion General Diesel Discussion.

 19618Likes
 
LinkBack Thread Tools Display Modes
post #42931 of 43531 (permalink) Old 06-09-2019, 07:35 AM
Junior Member
 
Nscayounggun's Avatar
 
Join Date: Sep 2015
Location: Connecticut
Posts: 102
Washed mine as well
Attached Images
 
ChevyDMax89 and harnold like this.

Mike
08 CCSB SLT, Kory tuned, Banks CAI, MBRP 4" straight pipe, 20x10 Moto 962's, 305/55R20 M/T ATZ P3's, Kryptonite Tie Rods-more to come soon!
Nscayounggun is offline  
Sponsored Links
Advertisement
 
post #42932 of 43531 (permalink) Old 06-09-2019, 07:37 AM
Duramax Lifetime Supporter
 
407driver's Avatar
 
Join Date: Oct 2016
Location: Maurice, LA
Posts: 3,783
Quote:
Originally Posted by Hook'em_Horns! View Post
The HB can. When you think pressure is being held, I'd remove the two nuts between the two units, see if the pressure is released.
If it turns out to be the HB, what is the advantage of the LML version vs the LMM version if the price were the same?

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, MBRP Downpipe back 4" exhaust with muffler and FTE 30" resonator/muffler, Sinister EGR Delete, Tuned but wont say who did it, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
407driver is offline  
post #42933 of 43531 (permalink) Old 06-09-2019, 10:42 AM
Most Known Unknown
 
jwcgmc1985's Avatar
 
Join Date: Jan 2012
Location: Magnolia Tx
Posts: 29,174
jwcgmc1985 is offline  
Sponsored Links
Advertisement
 
post #42934 of 43531 (permalink) Old 06-09-2019, 11:23 AM
Duramax Lifetime Supporter
 
407driver's Avatar
 
Join Date: Oct 2016
Location: Maurice, LA
Posts: 3,783
After reading and digesting all yawl's replies (THANK YOU ALL VERY MUCH) I did a bit more troubleshooting/diagnosing. The pulsing is at very low speed but low speed also equates to low RPM.

I read in another thread about a similar problem and it turned out the PS pump was bad. Most likely a stuck vane. This makes sense to me because at times it is more or less severe, so something changes.

I went looking for a method to test my theory. I decided that if it is the PS pump and it is RPM based I should be able to prevent it by keeping my RPM up while coming to a stop. If Im correct, the problem should not occur or would be significantly less severe.

I drove down an otherwise unoccupied country road at 40 MPH, took my foot off the throttle and shifted into neutral. I resumed the throttle up to 2000 RMP and used my left foot to brake............No pulsing. I did it three more times, same result.

I went back to leaving it in gear and the pulsing resumed and was worst when the RPM dropped below 1000 (equal to about 5 MPH.

I think I have a PS pump bad. I found a thread for How To (Thanks again Hook) seems easy enough; went to Rock's site, ordered a new pump, new Gates hoses (pressure and return). They will be here on Friday but I will be in Houston (Astros games), so I will do the work on Monday following.

Wish me luck!
ChevyDMax89 likes this.

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, MBRP Downpipe back 4" exhaust with muffler and FTE 30" resonator/muffler, Sinister EGR Delete, Tuned but wont say who did it, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.

Last edited by 407driver; 06-09-2019 at 11:25 AM.
407driver is offline  
post #42935 of 43531 (permalink) Old 06-09-2019, 08:20 PM
DuramaxForum Enthusiast
 
mizterwizard's Avatar
 
Join Date: Sep 2016
Location: Not in Boise but nearby.
Posts: 2,422
You should probably do a flush while you are at it. When the pump goes bad it often puts metal shavings into the HB and P/S gear.

As far as any difference between hydraboost units, I'd stick with what ever came on the truck. When you mix and match stuff things can get complicated. The main problem you might run into would be the shaft that goes between the HB and the master cylinder, which could be the wrong length. Many HBs and MCs don't come with that shaft because you have to reuse the old one to be sure it is right.

If you have a too long shaft it can depress the master cylinder piston which will prevent the release of pressure into the reservoir.
mizterwizard is offline  
post #42936 of 43531 (permalink) Old 06-10-2019, 02:19 AM
Duramax Lifetime Supporter
 
407driver's Avatar
 
Join Date: Oct 2016
Location: Maurice, LA
Posts: 3,783
Quote:
Originally Posted by mizterwizard View Post
You should probably do a flush while you are at it. When the pump goes bad it often puts metal shavings into the HB and P/S gear.

As far as any difference between hydraboost units, I'd stick with what ever came on the truck. When you mix and match stuff things can get complicated. The main problem you might run into would be the shaft that goes between the HB and the master cylinder, which could be the wrong length. Many HBs and MCs don't come with that shaft because you have to reuse the old one to be sure it is right.

If you have a too long shaft it can depress the master cylinder piston which will prevent the release of pressure into the reservoir.
I intended to do a flush after the install. I normally flush the PS and brakes on the same day so I will do the PS flush followed by the brake fluid flush just to keep them on the same schedule.

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, MBRP Downpipe back 4" exhaust with muffler and FTE 30" resonator/muffler, Sinister EGR Delete, Tuned but wont say who did it, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
407driver is offline  
post #42937 of 43531 (permalink) Old 06-10-2019, 08:33 AM
Junior Member
 
07Dmaxx93's Avatar
 
Join Date: Mar 2018
Location: Eastern North Carolina
Posts: 225
Garage
Went for a little drive!



Sent from my iPhone using Tapatalk
M.A.M. and Black HD like this.

2007.5 CCSB LMM
EFI live ECM Tuning by PPEI
S369SXE by WCFab
Fass 150GPH
XDP Sump



Instagram: 07Dmaxx
07Dmaxx93 is offline  
post #42938 of 43531 (permalink) Old 06-10-2019, 09:19 AM
DuramaxForum Veteran
 
hdrolling's Avatar
 
Join Date: Apr 2011
Location: Grays Creek, NC
Posts: 1,448
Garage
Swapped out the chrome window molding with OEM black.
Attached Images
  
ChevyDMax89 likes this.

2018 3500HD LTZ DRW

My build thread https://www.duramaxforum.com/forum/b...lly-build.html

GM DRW club member #224
hdrolling is offline  
post #42939 of 43531 (permalink) Old 06-10-2019, 09:37 AM
Duramax Lifetime Supporter
 
M.A.M.'s Avatar
 
Join Date: Apr 2014
Location: Millersburg, OH
Posts: 8,346
Garage
Quote:
Originally Posted by 07Dmaxx93 View Post
Went for a little drive!

https://youtu.be/YNMJsbg0gDk


Sent from my iPhone using Tapatalk


Sounds sick!


Sent from my iPhone using Tapatalk
07Dmaxx93 likes this.

2017 GMC 3500 DRW/CCLB

--2015 GMC 3500 SRW/CCLB--
M.A.M. is offline  
post #42940 of 43531 (permalink) Old 06-10-2019, 10:21 AM
Junior Member
 
Join Date: Dec 2018
Location: Missouri
Posts: 67
Did an oil change and found an oil leak from above the oil pan somewhere. Now to try and find what's causing it..

07.5 Chevy 2500HD CCSB
PPEI EFI LIVE
Flo Pro DPF delete pipe
Deviant EGR Blocker Plate
dam112004 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome