LS factory cruise control hook up

[1965Impala]

Originally Posted by ls1nova71

I've heard that there are different shift tables for when the cruise is engaged, however, I hooked that wire up on both my truck and my car, and couldn't tell any difference what so ever. I suspect it also sends a signal to the instrument cluster, which is a module it's self, and is what will disengage the cruise when the shift lever is moved into neutral while driving with the cruise on. I have the factory 5.3 NSS mounted on the transmission, and all the wires are hooked up, and it does not disengage when shifted into neutral. Not a big deal since it seems totally unnatural to do that anyway, but I've tested it and it's the same on both of my cars, it will rev until it hits the rev limiter if you don't shut it down first. Also, as far as I know, all aftermarket cruise controls will do the same thing.

Got it. Thanks for the quick reply!

[chipflyer]

Great thread with lots of great info! I have a new wrinkle though and I will say that after looking at lots of info about adding this cruise control I have worked myself into a state of confusion.

I am adding a 2002 5.3 to my truck. I hadn't originally planned to add cruise but it seems pretty simple, I have it and its now part of the build. I have built the relay circuit shown that Brendan shows on lt1swap.com to send 12v to the PCM (TCC) when I hit the brakes, simple enough.

Now my question is can I use this same circuit for the cruise solution by tying (pin G) into the cold side stop lamp between relay post 85 (circled in red)? Relay post 30 (12v to TCC) could then also be tied into terminal D on the cruise harness for power until the brake pedal is pushed, correct?


It would seem to me I can do this with the original 2-terminal brake switch with little modification and keep things fairly clean and both the TCC and cruise would get what they both need to work correctly.

Am I missing something though? thoughts?

[ls1nova71]

^^^ Yes, that should work fine. You worded your second paragraph backwards, it cuts power to the TCC when brakes are applied, but we get the idea.

[chevydog66]

My cruise control quit working. Everything seems to be getting power and wired correctly by using a test light. 1 question, the yellow vss wire, should that have 12v power when using a test light?

[chipflyer]

My vss wire was green/white. I found this link helpfully and it was correct for my 2002 Yukon 5.3.

http://www.sparkys-answers.com/2009/...e-control.html

Jeff

[ls1nova71]

Originally Posted by chevydog66

My cruise control quit working. Everything seems to be getting power and wired correctly by using a test light. 1 question, the yellow vss wire, should that have 12v power when using a test light?

So it was working and now it doesnt? What exactly is your set up? I cant remember what everyone is using off the top of my head, my memory isnt what it used to be.

[chevydog66]

My vss wire is green/ white also. But it also goes to a yellow wire which goes to speedo. I'll check voltage there. Thanks.

[chevydog66]

01 6.0 dbc 4L65 trans with your cruise control/turn signal stalk. I have the control module from a 01 or 02 truck. Autometer digital speedo. I checked most of the wiring and it checks out ok. It was working a couple weeks ago.

[ls1nova71]

If it was working a few weeks ago, then I would think it was wired right.. both your speedo and brake lights are currently working, correct? If so, then try lightly tapping on the cruise module with a small hammer and then try it again, ivr seen modules stick or go bad and tapping on them will sometimes get them to work again. If it fixes it, youll need to get a new cruise module. If not, ill have you test the switch, so let me know how that goes.

[chevydog66]

I tapped on it and now it works. Looks like a trip to junkyard for me. What years am I looking for again for a replacement? And while we're at it can u explain how to test the switch? Thanks much.

[ls1nova71]

I would be looking for a '99-'02 truck cruise module since it would be a direct replacement. Full size vans from '03-'07 will have them too. Astro vans and S10's may be more plentiful though, but you may have to change the end that hooks to the throttle body.

As for checking the switch, you would need a test light, a battery and some wire to test it at the end that plugs into the pigtail. Basically what you would be doing is hooking power to one of the terminals and the test light to another and then going through the switches to make sure they work (light comes on). I have a pigtail wired up with three light bulbs that I use to test them when I get done putting them together, but that's probably more hassle to go through to just test one switch.

[BlueJeep]

Originally Posted by ls1nova71

I would be looking for a '99-'02 truck cruise module since it would be a direct replacement. Full size vans from '03-'07 will have them too. Astro vans and S10's may be more plentiful though, but you may have to change the end that hooks to the throttle body.

First of all, thank you for all the wonderful info!

Do you happen to know if the cable coming out of the cruise control module is the same length for all applications? I'm wondering if there are shorter options than the 99-02 ones.

[aknovaman]

Testing Gen IV DBW cruise this week on my buddies e38 ecu 6.0L 4L60e jeep swap. I am using a 2007 suburban BCM and precision 20 turn pots to set the resistance values needed to simulate the steering wheel resistors. It only takes two wires from the BCM to the resistors. As of right now we are using mini 3 amp momentary toggle switches. There is almost zero current flow through any of the gm switches. More info to follow.

[Xeen]

I have a 2003 Vortec DBW and I have a stand alone PSI harness that is a 3-wire cruise.
Grey - cruise On/Off
Dk Blue - cruise Set/Coast
Black - cruise Resume/Accel

I purchased a Dakota Digital cruise control handle (HND-3) which I believe is a 4-wire before I did any research (I know that's not smart) If it won't work for my application I will just sell it here on the board.

If my Dakota Digital cruise control handle won't work or it would be a lot easier to just get a different cruise control handle which one do I need to get to make it work?
I will be installing this into a 1971 GM truck tilt.

Thanks in Advance.

[Dubnova]

Spankysrodshop.com Try these guys. I just ordered on for my LS3 (it's not running yet) they came recommended by a forum member and Dakota Digital. It's a plug in kinda deal and it's dang sure not cheap.

[Xeen]

Originally Posted by Dubnova

Spankysrodshop.com Try these guys. I just ordered on for my LS3 (it's not running yet) they came recommended by a forum member and Dakota Digital. It's a plug in kinda deal and it's dang sure not cheap.

I was thinking more along the lines of going to a salvage yard and getting a cruise control handle that will bolt right in.

[ls1nova71]

Originally Posted by Xeen

I was thinking more along the lines of going to a salvage yard and getting a cruise control handle that will bolt right in.

You can use a couple of relays to reverse the switches from normally closed to normally open, but if you dont want to do that, there is only one application that will both work and be a bolt on deal, but they are very hard to find these days. If you're junkyarding though, look for one off a 83-84 Chevy truck, without the wipers on the column. They bolt on and are 4 wire switches. If you cant find that, 81 Chevy vans use the same lever and you can change the swithc inside to a 4 wire. 81-82 trucks have them too. I also have some redone levers from time to time that are already converted and repainted and have new lettering on them so they look new. You would have to PM me about availablity.

[Xeen]

Originally Posted by ls1nova71

You can use a couple of relays to reverse the switches from normally closed to normally open, but if you dont want to do that, there is only one application that will both work and be a bolt on deal, but they are very hard to find these days. If you're junkyarding though, look for one off a 83-84 Chevy truck, without the wipers on the column. They bolt on and are 4 wire switches. If you cant find that, 81 Chevy vans use the same lever and you can change the swithc inside to a 4 wire. 81-82 trucks have them too. I also have some redone levers from time to time that are already converted and repainted and have new lettering on them so they look new. You would have to PM me about availablity.

Thank you very much for the information Sir I appreciate it.
It's guys like you that make this board what it is and keep me coming back here.

[Casaba]

I know this is an old thread but I need to ask a question. Will that servo-motor unit work with the 2k vss from my 87 k5?
My truck was TBI but that was all removed for a 383 with carb. I have most of the old vacuum servo parts but can't find an engine bracket and I have to modify it anyway since I'm running the tvmadeez plate with a speed demon carb.

I picked up the electro-motor unit at the pullapart and would like to make it work but would like to avoid buying the VSS adapter from jtr to keep my mechanical speedo unless it's needed.

Not sure about this unit but with no ECM, isn't it just keeping the throttle at a match for the signals it gets from the VSS?

Thoughts?

[ls1nova71]

Originally Posted by Casaba

I know this is an old thread but I need to ask a question. Will that servo-motor unit work with the 2k vss from my 87 k5?
My truck was TBI but that was all removed for a 383 with carb. I have most of the old vacuum servo parts but can't find an engine bracket and I have to modify it anyway since I'm running the tvmadeez plate with a speed demon carb.

I picked up the electro-motor unit at the pullapart and would like to make it work but would like to avoid buying the VSS adapter from jtr to keep my mechanical speedo unless it's needed.

Not sure about this unit but with no ECM, isn't it just keeping the throttle at a match for the signals it gets from the VSS?

Thoughts?

I dont think it will work with what you have. Just putting a VSS in andntrying to run it straight to the cruise most likely isnt going to be the correct signal. The PCM takes the VSS pulses and converts it to a different signal if im not mistaken, but I could be wrong.

If you have the factory cruise, it seems like it would be just as easy to adapt to your carb as the newer cruise module since they both will need to be modified to work.

But if you try it, post back and let us know if it worked.

[Casaba]

I tried a crude test but will have to make up a better wiring harness. Per the AC delco manuals on both systems, the older vacuum system used the 2k square wave pulse and the servo-motor uses 4k sine wave and the PCM converts it to 4k square so it's twice he signal.

Theoretically what I wonder is if the module will simply match pulses or if it in fact would think I'm running 12MPH at the minimum 25MPH to activate the cruise.

I will play around with it. The reason for wanting the newer is because I have no room for the vacuum servo and can mount the cable system on the wheel well. I know there are cable set ups for the vacuum as well but not sure what years and car to look for a donor cable setup with bracket

[68c10airstream]

Hi casaba, digging in my mental archives i believe buick or caddy used a vacuum servo mounted off to the side of the engine and used a bead chain and a pulley to make the 90 degree turn from behind and to the side of the rear of the cylinder head. I think it was in the early 70's. I think i'm getting a little older. Good luck, brian fuller

[solidaxel]

Originally Posted by 68c10airstream

Hi casaba, digging in my mental archives i believe buick or caddy used a vacuum servo mounted off to the side of the engine and used a bead chain and a pulley to make the 90 degree turn from behind and to the side of the rear of the cylinder head. I think it was in the early 70's. I think i'm getting a little older. Good luck, brian fuller

That cruise control set up(factory) sounds just like what was on my 78 Silverado before I did the LS change over

[YOUSTB2WD]

Has anyone figured out how to make a cruise engaged light work?

[tsetsaf]

Originally Posted by YOUSTB2WD

Has anyone figured out how to make a cruise engaged light work?

My cruise on light works with my Dakota Digital gauge package. I have a 5.3L and the wiring harness included a wire for that purpose.