Low oil pressure / stop engine warning - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 5.3L V8 Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Performance Engine Tuning/Engine Modifications

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Thread Tools
Old 12-26-2015, 09:30 PM
HawkeyeC25 HawkeyeC25 is offline
Junior Member
2005 Chevy TrailBlazer LT EXT
Silver Mist Metallic 5.3L V8 4X4
Join Date: Nov 2015
Location: Howell, MI
Posts: 6
Again, I know this is an older thread, but I've found out more info on this issue. A lot of people have found that this is caused by the filter under the Oil Pressure Sensor being plugged (this we mentioned above). It's a very cheap part ($5-$10) but I can only find a genuine GM part (no aftermarket). For those that have the issue, I would try this before cracking into the oil pump. I have 154,000 miles on my 05 and I'm going to put a new filter and sensor to see if my issue goes away (much like others, mine only comes on at low engine speed and sometimes after heavy braking). I'll keep people posted if they are interest.
Reply With Quote Quick reply to this message
Sponsored Links
Old 12-26-2015, 10:22 PM
robertgee robertgee is offline
Senior Member
2006 Chevy TrailBlazer LS
Sandstone Metallic 4.2L I6 4X4
Join Date: Oct 2007
Location: Hendersonville, N.C.
Posts: 672
Originally Posted by pauln1 View Post
Well the new oil pump seems to have solved the low oil pressure warning at cold start up. How an oil pump can become worn at such low mileage is beyond belief but maybe it was taxed by the two engine rebuilds. Let's see how soon before something else fails. What I have learned on this rig is that preventive maintenance cannot counteract a poor design and poor quality parts.
Food for thought on this old post ........ 2 engine rebuilds, yet the same oil pump was used ?
Reply With Quote Quick reply to this message
Old 12-29-2015, 12:01 AM
HawkeyeC25 HawkeyeC25 is offline
Junior Member
2005 Chevy TrailBlazer LT EXT
Silver Mist Metallic 5.3L V8 4X4
Join Date: Nov 2015
Location: Howell, MI
Posts: 6
Well, my findings might be delayed... did a fresh oil change with a new wix filter and high mileage full synthetic oil and my oil pressure hasn't dipped below 45psi yet! Maybe the synthetic oil with the additives clean out the screen/filter?? :fingerscrossed:
Reply With Quote Quick reply to this message
Old 07-25-2016, 08:44 AM
joe s joe s is offline
Junior Member
2004 Chevy Trailblazer
Blue 4.2L I6 4X4
Join Date: Mar 2014
Location: CT
Posts: 2
I'm reviving this old post again because my wife's 04 Trailblazer (I6 AWD) has been lighting the oil pressure warning at cold starts. It just turned over 200k miles. I haven't replaced the oil pressure sender yet. I looked for a 'filter' for the oil pressure sender and found these, but not sure if that's what I need, nor where they go. Rockauto calls them oil filter bypass valves, but they appear to have a little filter in them. And why are there two?

Genuine GM Valve Part# 25014612

Genuine GM Valve Part# 25014006

Can anybody provide more details?
Reply With Quote Quick reply to this message
Old 12-30-2016, 09:01 PM
Ramon Bastidas Ramon Bastidas is offline
Junior Member
2007 Chevrolet TrailBlazer LTZ
Gray 5.3L V8 4X4
Join Date: Dec 2016
Location: Puerto Ordaz Venezuela
Posts: 1
I got the same problem

Originally Posted by wcosh View Post
I know this thread is 1 year old (to the day) but I just experienced the same issue.
Low oil pressure warning followed by "shut off engine" in the Display

After reading up on the issue I tried the following
-cleaned the throttle body
-inspected all vacuum connections

The throttle body was pretty clean but had some soot around the butterfly and I cleaned that off.
I put zip straps on all the vacuum connectors to tighten up the connections.

So far, I have gone 2 days without the low pressure warning.

total cost:
45 minutes of my time
.50 worth of TB cleaner
.75 worth of zip straps
But I replaced the the oil pump and a "O" ring and the warning appear again
Reply With Quote Quick reply to this message
Old 05-14-2017, 10:46 PM
Harleyh_102 Harleyh_102 is offline
Junior Member
2006 Chevy TrailBlazer LT EXT
Light Pewter Metallic 5.3L V8 4X4
Join Date: May 2017
Location: Roosevelt, ut
Posts: 1
I have an 06 trailblazer 5.3 had it two months put about 1500 miles on it since i bought out used,
and I was driving into town and i lost all oil pressure, stopped and checked it, wasn't low on oil, started it kept oil pressure for like 10 seconds, then lost it, I have a knocking on the motor. And metal shavings in the oil! They look aluminum, the block is aluminum! Is the motor trashed or is it rebuildable?
Reply With Quote Quick reply to this message
Old 11-04-2017, 09:47 PM
Gusvcamp73's Avatar
Gusvcamp73 Gusvcamp73 is offline
Junior Member
2003 Chevy TrailBlazer LT
Dark blue 5.3L V8 AWD
Join Date: Nov 2017
Location: Dayton, ohio
Posts: 2
I have an 2003 chevy tb 4wd LT and one day my son was driving it and it started knocking loud we did an oil change and put some oil treatment in after the oil change and when i took off the oil fliter it was so thick and black , we had it only month and half bought it from an dealer the engine sound good when we first got it, can someone please tell me what can i do my wife was talking about getting another engine put in
Reply With Quote Quick reply to this message
Old 11-04-2017, 10:04 PM
Jewel red 5 Jewel red 5 is offline
New Member
2007 GMC Envoy Denali
Liquid Silver Metallic 5.3L V8 AWD
Join Date: Dec 2012
Location: NJ
Posts: 98
I would try oil changes every 250 to 500 miles see if it cleans out before I drop a motor in it. Don't use a motor flush I was always told. Im not a mechanic but I was told to add little trans fluid like 1/8 of a cup or less to clean up engine deposits. I would wait to see if someone else who is more engine friendly adds their option first before I do it. good luck
Reply With Quote Quick reply to this message
Old 02-20-2018, 10:55 AM
Jaybxnyc's Avatar
Jaybxnyc Jaybxnyc is offline
Junior Member
2006 GMC Envoy Denali XL
Graphite Metallic 5.3L V8 4X4
Join Date: Jan 2013
Location: DC
Posts: 7
Same issue with my 06 Envoy decided to rebuild engine

Can anyone tell me a good aftermarket brand where I can buy a rebuild kit for my 06 Envoy 5.3 L engine? grateful if you could send me some brands or links on where to purchase and what to look out for.
Reply With Quote Quick reply to this message
Old 08-12-2018, 10:54 PM
Jdanyel73 Jdanyel73 is offline
Junior Member
Join Date: Aug 2018
Posts: 2
So today, about 35 miles from home, my engine light came on and oil pressure gauge was showing low. I have a 2006 GMC Envoy Denali with a V-8. Anyway, I stopped as soon as I could and checked the oil level. It was fine. When I started back up, the oil pressure gauge went to normal, but a few miles up the road, the engine light started flashing. I pulled off interstate into a rest area. When I started the engine again there, it had a clicking sound and bad vibration. I have OnStar so I called them and got it towed to the local dealer. It is sitting there and I guess I’ll find out tomorrow what they say the problem is. I just bought the Envoy in July and I know it has a rebuilt engine. The vehicle has 99214 miles, but the engine significantly less. What could be wrong?
Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
Thread Tools

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

Forum Jump

» Sponsors

Advertising Info

All times are GMT -4. The time now is 07:06 AM.

Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed