what you copied/pasted from SI (its kinda butchered a bit, there are some incorrect statements above) above does not apply to the duramax....or any classic full size GM truck for that matter. Unless its a 2009+ with stabilitrak. Or an 02-05 truck with quadrasteer.What are your symptoms of Steering Position Sensor failure? DTC C0460? I have the Tech Manual in hand. But, I can not find the appropriate schematic, ... yet. The manual may not have one. However, ... It does have some Steering Position Sensor component testing based on the DTC. It also has sensor replacement instructions. It also has several pages on Sensor alignment. You have to pull the steering column to change the Sensor. The Sensor provides a signal to the Vehicle Enhanced Stability System, which controls the transmission and brakes etc. to help maintain stability. The signal to the VHSS is routed via the Power Steering Control Module (PSCM).
NOTE: If you remove the Sensor and plan to reuse it, you have to pin it before removal. (A new one comes pinned. You remove the pin after installation.) If you do not pin it before removal, it is not reusable.
There is a Tech II test for the Sensor. Putting that aside:
Verify that the wiring harness between the Sensor and the Power Steering Control Module (PSCM) is not chaffed. The Sensor is on the steering shaft under the dash just in front of the Steering Post support. It has several wires attached. You have to pull the steering column to replace the Sensor. The PSCM is bolted to the side of the passenger-side battery tray.
To test the Sensor after verifying no chaffed wires between the Sensor and the PSCM:
With ignition off, disconnect the harness at the Power Steering Control Module (PSCM). Pin 1 should be a black wire (i.e. ground. No schematic on this. Am guessing it is black. But it is common to both the Pin 7 and pin 8 circuits.) Measure resistance across pin 1 and 7. Spec = 3k - 10k. The second test is across pin 1 and 8. Spec = 6k - 20k. Out of Spec, you replace it. I suspect you could also make these tests at the Sensor, if you already had it out. It would be hard to do it under the dash.
I suspect you could also turn the key to ON and sweep the sensor while you are watching the ohm meter. (You could not do this with the sensor off the steering post cause it has to be pinned.) This would allow you to turn the steering wheel and see if there are any intermittent spots in the Sensor. If the Sensor shows infinite Ohms on either of the tests, the circuit is open and the sensor needs to be replaced.
Good luck on this one. The centering of the new Sensor looks a bit complicated. But, ... maybe the pinning bypasses all that B.S.
ok couple things that are incorrect...no offence but I would find a more accurate service manual.Guess I forgot to add the disclaimer: It is from an '09 tech manual. The Sensor testing and removal should be the same. Actually, the connection to the PSCM is probably the same also. Yes, the PSCM outputs to the stability control system and the steering system is unique. But, then he did not say that he did not have them.
The Tech Manual is kinda hosed for these circuits. There is no schematic and the component testing and replacement are scattered over a couple hundred pages. The Hybrid circuits are scattered among the Dmax circuits. So, if you can describe it better have at it. You won't hurt my feelings!
However, it does apply to Dmax trucks. The outputs from the PSCM may not apply to classics. Never had to work with it on my '04. But if he has got the Sensor, then it's testing applies. But like I said, if you want to describe it better, please do.
your GM tech is an idiot, like a good amount of them are. I just spent about 20 minutes and half a page explaining how the 99+ trucks DO NOT HAVE A STEERING WHEEL POSITION SENSOR... (unless they have stabilitrak)My truck has 21,000 miles and when you go into a corner and turn right you loose almost all steering feel. It is as if the left front tire is half flat and rolling over on the side wall. It is definately worse at 35MPH or above. I also have an intermittent screech in the upper steering column that I figure is the clockspring for the airbag. I have checked all front bearings and suspension components and can find nothing wrong. A GM tech at a local chevrolet dealer told me it sounded like the steering position sensor is bad. I know they had alot of trouble with these in 97, 98, 99. Thanks for the responses Paul.
I think you may be right.SO. Basically. To the original poster...your truck doesn't have quadrasteer or VSES (stability), so therefore it DOES NOT even have a SWPS........
hope that helps clear things up...
arrgh no they dont. They use a digital phase position (PLL) sensor for reference. That is NOT THE SAME as an analog voltage potentiometer.Also, they use a couple different types of sensors. However, all have variable resistors, as well as switches for pulse circuits. Some of the circuits in each sensor, shown in the book, can be tested for resistance. Also, even the pulse circuits can be checked for Open when it supposed to be open, shorts to ground, etc., by doing resistance checks. Switches and Pots are electo-mechanical and are the most likely part to fail. Not everyone needs to be dependant on a Tech II to find isolated problems. Anyway
that manual isnt bad, but doesnt cover half of what SI does (the online dealer service manual) and ive seen more than a couple of errors in them...Got the GM Tech Manual for the '09 2500 HD part number is GMT/09-CK9PU.
that is incorrect, as Ive said above.They show Analog Potentiometers on all three schematics.
C0455 is for light duty's and hybrids. If you read C0710, you'll that there are several descriptions:There are a couple codes C0455 & C0710 that address this component. The one that applies depends on the GVW.
well, sort of...you can also install programs onto your windows PC manually from the command prompt...and you can also fill up a semi's tires with a bicycle pump!Yes, a Tech II would make things easier. But you would be surprised what a retired Instrument and Control Tech can do with a signal generator, scope and mutimeter.