Question about Chevrolet Silverado 3500HD
If you are looking at the motor. follow your supply lines that are on the drivers side up. they will go into a juction box under the wiring harness about half way up the intake. your sensor is just before the box. What is you duramax doing? They are prone to injector and injector cup problems. Feel free to call me 570-878-5222. leave me a message if needed.
Posted on Nov 29, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: 2004 lly duramax
try hooking up a fuel pressure test gauge to fuel rail pre filter and post filter and rev truck to 2500 rpm what is fuel pressure ?
next using a vacume pump attach to fuel pressure regulator pump up while engine is running only pump up to 8 psi to see if pressure changes if not replace pressure regulator .
it could also be ur speed sensor switch on overdrive transmission
good luck with it
Posted on Jun 30, 2008
SOURCE: location of oxygen sensor
I believe you may have three (3) O2 sensor, (2) of the sensor is on ether side of the exhaust down pipe and some times called up stream O2 sensor, the third O2 sensor know to some as the down stream O2 and is after the Catalytic converter.
The up stream O2 monitors the left and right side banks and sends signals to the ECM to make the adjustments to the injectors to keep the proper air/fuel ratio.
The down stream O2 monitors the catalytic converter and sends signal to the ECM if the catalytic converter has gone bad.
Good luck and hope this helps. If you get it scanned at Auto Zone, they should be able to let you know which O2 has gone bad so as to not change all three. You could always check the wire harness to the down stream O2 for corrosion. Keep me posted
Posted on May 29, 2009
Under intake manifold on top of block,you need to remove intake to access sensors there are two of them you can't miss them when intake is off. After replacing sensors you need a new intake gasket.
Posted on Apr 04, 2010
Tips for a great answer:
Jul 11, 2017 | 2011 Chevrolet Equinox
Jul 11, 2017 | Cars & Trucks
Jun 30, 2016 | Cars & Trucks
Aug 25, 2014 | 2004 Mercury Mountaineer
Apr 09, 2014 | 2006 GMC Sierra 3500
Sep 14, 2012 | Chevrolet Cars & Trucks
May 07, 2010 | 2004 Chevrolet Silverado 1500 Crew Cab
Nov 10, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab
Apr 27, 2009 | 2003 Chevrolet Silverado 2500HD
Jun 29, 2008 | Chevrolet Silverado 3500HD Cars & Trucks
277 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: