: How to tell if you have variable steering assist?



shortfur7
09-08-11, 01:44 AM
I was looking for a new ps steering pump and rack and pinion and it keeps asking if i have variable steering assist. How do i know if i have it? i have never seen anything on my car with that but i just wanted to check to be sure.

ddalder
09-08-11, 01:56 AM
Look at your Service Parts Identification label. This is located on the underside of the cover over your spare tire. If you see the 3 character code NV7, then you do have variable effort steering. This is built in as part of the steering rack so you won't see a separate component.

shortfur7
09-08-11, 02:06 AM
Ok, thank you.

AnderbrA
09-08-11, 11:15 AM
In my quest to find a replacement pump for my 07, I spent a lot of time looking this up. I discovered that the variable assist didn't get used until I believe '08.

Correct GM Part Number is 25900772.

If looking salvage, any from 05-07 with 4.6 or 4.4 will work. 08+ 4.6 and 4.4 without active steering will work.

ddalder
09-08-11, 02:16 PM
In my quest to find a replacement pump for my 07, I spent a lot of time looking this up. I discovered that the variable assist didn't get used until I believe '08.
Definitely used prior to 2008. I just looked up an '05 w/ V6 engine that has RPO NV7. I don't know about prior years, although the Bonneville went back at least as far as 2000.

AnderbrA
09-08-11, 04:10 PM
This is what I got my information from. There are so many different parts for these cars, it was confusing. Not sure why the v6 doesn't have 2 pump options.
4.6
25900768 PUMP,P/S. Required: 01For: DW 4.6A(LH2),ACTIVE STRG CONTROL(JL7) (2008-2010) (2008 - 2010).
25900772 PUMP,P/S. Required: 01 For: DW29 4.6A(LH2) (2005-2007) (2005 - 2007). For: DW29 4.6A(LH2),(EXC ACTIVE STRG CONTROL(JL7) (2008-2010) (2008 - 2010). For: DX (2006-2009) (2006 - 2009). For: DY29 4.6A(LH2),(EXC ACTIVE STRG CONTROL(JL7) (2008-2009) (2008 - 2009).

3.6
25900770 PUMP,P/S. Required: 01 For: D29 3.6-7(LY7) (2005-2007) (2005 - 2007). For: DW 3.6D(LLT) (2008-2011) (2008 - 2011). For: DY 3.6D(LLT) (2008-2009) (2008 - 2009).

ddalder
09-08-11, 04:21 PM
Okay, I think I understand the confusion now. Active steering is much different than variable effort steering. Active steering wasn't available until 2008, as I recall. This also called "Enhanced StabiliTrak" and very few vehicles were built with this option. With "Active Steering", the car will actually make some steering corrections as part of the stability control system in a situation where it detects loss of driver control. Variable effort steering is a magnetically adjusted steering rack that makes the steering wheel more/less difficult to turn based on how fast the car is travelling.

When looking for aftermarket parts (steering pump as an example), the computer used to look-up the item of course asks several questions about the build. This is true whether parts vary or not based on a particular option. I've had a lot of parts stores look something up based on one option and then tell me "Oh, well it's the same part without that option as well". The system should be smart enough to prompt when a question is required because right now, it sometimes leads to unnecessary confusion.

AnderbrA
09-08-11, 04:26 PM
Yeah, I remember variable effort steering on my 2000 Olds Alero. Just regulates steering pressure and ratio based on speed. I think they had RPM variable steering prior to that. Crazy the advancements of some cars now a days.