Tips for changing fuel pump - 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 General Tech Q&A > General

General If it doesn't fit in any other forum

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
  #1  
Old 11-06-2008, 12:19 PM
rbarrios's Avatar
rbarrios rbarrios is offline
TrailVoy Guru
 
2003 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 2WD
Join Date: Sep 2004
Location: west covina
Posts: 5,267
Tips for changing fuel pump

Ok.... so im now past 133,000 and still running the factory pump on my 2003- purchased in 2002.
What makes this a bit surprissing to me also- is that Id say 90% of the time I refuel when the LOW fuel light comes on- many times driving for 10-15 miles PAST the time the low fuel light came on...... you know what they say about running the pump past 1/4 tank.....but mine is still going...
Presently it runs fine--- and I have never had any issues with an erratic fuel gauge....
BUT...
Now--- for peace of mind- I plan on changing the pump out this weekend.
Peace of mind that it wont fail suddenly... and in December Ill be doing a 3500 mile trip halfway down into Mexico...... last thing I want is a failed pump in the middle of a little mexican town.
So Ive ordered my ACDelco pump.........

Any tips for those that have done it?
Especially certain tools... any funny clips etc that made your change difficult?
I do have the short wheelbase and only the 18.7 gallon tank.
I plan on driving the truck until the low fuel light comes on-- and then drive it for maybe 15 more miles to end up with about 1 gallon left in tank.

Thanks. I plan on taking pics- Maybe ill do a how to on that...
__________________
2013 Equinox-3.6L DI- Best MPG 35
2010 Traverse-3.6L DI Best MPG 31.3
2003 Trailblazer LS 165,000 miles- Best MPG 24
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-06-2008, 12:47 PM
jwhite628's Avatar
jwhite628 jwhite628 is offline
Junior Member
 
2002 GMC Envoy SLE
Pewter Metallic 4.2L I6 4X4
Join Date: Sep 2008
Location: Wheeling, WV
Posts: 11
To Remove:

Remove the fuel tank from the vehicle.
Use a J 45722 fuel tank sending unit wrench and a long breaker bar to turn the fuel sender lock ring counterclockwise.
CAUTION
Handling the fuel sender assembly by the fuel pipes may cause damage to the joints.

Fuel sender assembly removal and installation

Remove the fuel sender assembly from the fuel tank.
Remove and discard the fuel sender assembly seal from the fuel tank.
Drain the fuel from the fuel sender assembly into an appropriate container.
Clean the sealing surfaces as necessary.
Set the lock ring on a flat surface and measure the clearance between the ring and the surface at seven points.

If the clearance is more that 0.016 in (0.41 mm), replace the lock ring.

To Install:

Install a new fuel sender assembly seal onto the fuel tank.
Install a new fuel sender assembly into the fuel tank.
Use a J 45722 fuel tank sending unit wrench and a long breaker bar to turn the fuel sender lock ring clockwise.
Install the fuel tank into the vehicle.
Reply With Quote Quick reply to this message
  #3  
Old 11-06-2008, 12:52 PM
jwhite628's Avatar
jwhite628 jwhite628 is offline
Junior Member
 
2002 GMC Envoy SLE
Pewter Metallic 4.2L I6 4X4
Join Date: Sep 2008
Location: Wheeling, WV
Posts: 11
Quote:
Originally Posted by jwhite628 View Post
To Remove:

Remove the fuel tank from the vehicle.
Use a J 45722 fuel tank sending unit wrench and a long breaker bar to turn the fuel sender lock ring counterclockwise.
CAUTION
Handling the fuel sender assembly by the fuel pipes may cause damage to the joints.

Fuel sender assembly removal and installation

Remove the fuel sender assembly from the fuel tank.
Remove and discard the fuel sender assembly seal from the fuel tank.
Drain the fuel from the fuel sender assembly into an appropriate container.
Clean the sealing surfaces as necessary.
Set the lock ring on a flat surface and measure the clearance between the ring and the surface at seven points.

If the clearance is more that 0.016 in (0.41 mm), replace the lock ring.

To Install:

Install a new fuel sender assembly seal onto the fuel tank.
Install a new fuel sender assembly into the fuel tank.
Use a J 45722 fuel tank sending unit wrench and a long breaker bar to turn the fuel sender lock ring clockwise.
Install the fuel tank into the vehicle.
Here is a pic for ya


Reply With Quote Quick reply to this message
  #4  
Old 11-06-2008, 01:08 PM
rbarrios's Avatar
rbarrios rbarrios is offline
TrailVoy Guru
 
2003 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 2WD
Join Date: Sep 2004
Location: west covina
Posts: 5,267
oh oh....

where do we get this J 45722 tool....
I was expecting it to be several screws all the way around....
__________________
2013 Equinox-3.6L DI- Best MPG 35
2010 Traverse-3.6L DI Best MPG 31.3
2003 Trailblazer LS 165,000 miles- Best MPG 24
Reply With Quote Quick reply to this message
  #5  
Old 11-06-2008, 01:47 PM
petevw's Avatar
petevw petevw is offline
TrailVoy Alumni
 
2002 Chevy TrailBlazer LTZ
Red Jewel Tintcoat 4.2L I6 4X4
Join Date: May 2007
Location: Orange County, New York
Posts: 3,244
Quote:
Originally Posted by rbarrios View Post
oh oh....

where do we get this J 45722 tool....
I was expecting it to be several screws all the way around....
I wonder if a place like AutoZone has one for "rent" like the fan clutch tool
__________________
Always remember: wherever you go, there you are!
PCM4less,HID,DRL killer,cabin air filter,Mobil 1,K&N,LED's,193K+,
Reply With Quote Quick reply to this message
  #6  
Old 11-06-2008, 02:08 PM
91RS 91RS is offline
TrailVoy Alumni
 
2007 Chevy TrailBlazer SS (1SS)
Imperial Blue Metallic 6.0L LS2 V8 2WD
Join Date: May 2008
Location: GA
Posts: 1,852
Quote:
Originally Posted by rbarrios View Post
oh oh....

where do we get this J 45722 tool....
I was expecting it to be several screws all the way around....
That would be called a flat-head screwdriver and a big hammer.
Reply With Quote Quick reply to this message
  #7  
Old 11-06-2008, 02:34 PM
WOOLUF1952 WOOLUF1952 is offline
No longer with us
 
2003 GMC Envoy SLT
Magnetic Red Metallic 4.2L I6 4X4
Join Date: Jul 2008
Location: Milwaukee, WI
Posts: 7,190
And, this may go under the heading of "Well no s**t" but the first thing I would do is blow out all dust and debris from around the locking ring.
Reply With Quote Quick reply to this message
  #8  
Old 11-06-2008, 02:38 PM
MAY03LT's Avatar
MAY03LT MAY03LT is offline
TrailVoy Guru
 
2003 Chevrolet TrailBlazer LT
Scratchy Black 4.2L I6 4X4
Join Date: Feb 2007
Location: nation of GMT
Posts: 9,856
Quote:
Originally Posted by 91RS View Post
That would be called a flat-head screwdriver and a big hammer.
i agree but i use a brass punch instead of a screwdriver

Quote:
Originally Posted by WOOLUF1952 View Post
but the first thing I would do is blow out all dust and debris from around the locking ring.
absolutly
Reply With Quote Quick reply to this message
  #9  
Old 11-06-2008, 03:45 PM
Super 88's Avatar
Super 88 Super 88 is offline
TrailVoy Alumni
 
2005 Chevy TrailBlazer LS EXT
Midnight Blue Metallic 4.2L I6 2WD
Join Date: Oct 2006
Location: North San Diego
Posts: 2,667
Quote:
Originally Posted by MAY03LT View Post
i agree but i use a brass punch instead of a screwdriver


Exactly what I was going to say. Safety first. You don't want any sparks to give you a nice "warm" feeling!
Reply With Quote Quick reply to this message
  #10  
Old 11-06-2008, 03:47 PM
rbarrios's Avatar
rbarrios rbarrios is offline
TrailVoy Guru
 
2003 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 2WD
Join Date: Sep 2004
Location: west covina
Posts: 5,267
very interesting...
i will have to check the auto parts loan tools
__________________
2013 Equinox-3.6L DI- Best MPG 35
2010 Traverse-3.6L DI Best MPG 31.3
2003 Trailblazer LS 165,000 miles- Best MPG 24
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 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 12:01 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