I live in the cold weather and wondered if there was anyway to set a high idle on the 03's. I know that the 04.5 and up have an override to do this.
Thanks

search from google you can do it yourself for the cost of a switch and an ecm pin from the dealer, not very hard to do

Do a search in the DIY section.

There should be some posts w/pics.





Gary

I did mine on my 02 and it works nice!

Now I remember where I got my instructions.................

Go to www.kennedydiesel.com (John Kennedy is a vendor here) and click on Tech Tips. Thats the instructions I used. It even has some very good pics. Takes about an hour. The hardest parts are getting the cover off the plug without tearing it up, and getting the pin to seat all the way. I used a small paper clip to finally get the pin to click in place.

Oh, and instead of using a switch, I used a wire off the brake pedal switch instead. It is one that has 12V on it when the pedal is in the normal position, and loses it when the brake pedal is depressed. I believe it is pin 5, which, IIRC, is the one closest toward the rear of the truck. I don't remember the wire color, and I'm nowhere near my truck at the moment. The best way to find it is with a test light or meter. This is also discussed somewhere in the DIY section, although probably fairly deep into it.

Hope this helps.







Gary

PPE SELLS ONE i GOT MINE OFF EBAY FOR $16.00 AND LOVE IT

PPE has one, we have sold a ton of them. Heres one for the 03-04 LB7 truck. http://www.alligatorperformance.com/product_info.php?products_id=2678

I got the part number and instructions from Kennedy Diesel. Terminal GM part #12084913 (5 per package) or GM part #12084912 (10 per package). Then went to NAPA had them get the pin. (The closest GM dealer was a ways away) and installed it. The hardest thing was like Grey Ghost said, gettin the damn cover off and makin sure the pin is in all of the way. My didn't work right away, due to the fact that the pip wasn't in all of the way. I just wired it to a switch because i had a spare pre-wired in my truck. Works like a charm.
Question to anyone:
Can i change the idle defaults of 1250 and 1700 rpm to 1000 and 1250 rpm?

Can i change the idle defaults of 1250 and 1700 rpm to 1000 and 1250 rpm?


Yes, with EFILive.




Gary

Hey thanks Gary. That's what i thought just wasn't for sure.

Yes, with EFILive.

Gary

Gary, I just pulled up my DSP5 tune as well as a "regular" tune and I don't see a setting in there for the high idle (PTO). There is a PTO category but there are no settings in there for idle speeds. I do know my OS was updated by the dealer at some point before I got the truck, wondering if they put a later OS that eliminated the high idle?

If you can provide the table # or name, it would be appreciated. I'm going to be working on wiring up a high idle switch soon and I'd like to be able to alter the idle settings.

Wow, that was a SWEET mod! Definitely VERY happy with this, too bad GM couldn't have included that stupid $.05 pin and a few pennies worth of wire from the factory! I was able to wire this up to my overhead switch that is in my socal gauge mount next to my tune selector switch. Tap the resume and its up to 1700 rpm...tap the cruise set button and its at 1250....VERY nice.

Glad to hear it's working for you. Yeah, it is sweet, ain't it? However, personally, I like having it connected to the brake switch which makes it impossible to run with it activated.

Do you still need to modify the settings?

If so, I will have to get with my son, as he is the "expert" in our family with the EFI stuff. Or, maybe some other EFI advanced user wil see this and can point you in the right direction.



Gary

why is it that my lights have to be on for mine to work, is anyone else seeing this

why is it that my lights have to be on for mine to work, is anyone else seeing this

Sounds like your truck is getting the +12V from a light circuit.
What is your Fast Idle wired to?

Maxdout, sounds like your trigger (12v) wire is running off a light output rather than ignition. As a result, your lights have to be on to get your high idle to work. Take the 12v source wire and put it into your fuse panel on a ignition switched source and you're good to go. I found an empty female 6 prong location on my oem fuse panel that runs off ignition 3 fuse....the three to the left are switched and the other three to the right of those are always hot.

Grey ghost, thanks for getting that info, I haven't seen it anywhere in EFI Live. As far as running off the brake switch, that is a nice feature but I believe the truck goes into valet mode after the high idle is deactivated. By doing the brake switch, it would never allow the valet mode. I can see in the future that it might be nice to have that option for when friends or family borrow the truck.

why is it that my lights have to be on for mine to work, is anyone else seeing this

Unwire whatever your Fast Idle is wired to.
Don't use a switch.

Connect the wire from the TCM to the Stop Lamp Switch, (mounted to and actuates with brake peddle depressed), to the end DK GRN/WHT wire.
This wire is only +12V when truck is RUNNING, transmission is in PARK, and the brake peddle is NOT depressed.
If you use a switch and you, (or someone else using your truck), forget the switch on when you drive away, it won't run well >2000 RPM.
Wiring to the DK GRN/WHT wire makes it a no-brainer.
Start truck, depress cruise control twice, and Fast Idle is engaged. The instant you depress the brake peddle to shift truck out of PARK, the +12V goes away, Fast Idle is disabled, and the RPM returns to normal 700ish RPM's before you're able to shift out of PARK.
As said above, www.kennedydiesel.com (http://www.kennedydiesel.com) has great directions with pictures, (but I wouln't use a switch).

Unwire whatever your Fast Idle is wired to.
Don't use a switch.

Connect the wire from the TCM to the Stop Lamp Switch, (mounted to and actuates with brake peddle depressed), to the end DK GRN/WHT wire.
This wire is only +12V when truck is RUNNING, transmission is in PARK, and the brake peddle is NOT depressed.
If you use a switch and you, (or someone else using your truck), forget the switch on when you drive away, it won't run well >2000 RPM.
Wiring to the DK GRN/WHT wire makes it a no-brainer.
Start truck, depress cruise control twice, and Fast Idle is engaged. The instant you depress the brake peddle to shift truck out of PARK, the +12V goes away, Fast Idle is disabled, and the RPM returns to normal 700ish RPM's before you're able to shift out of PARK.
As said above, www.kennedydiesel.com (http://www.kennedydiesel.com) has great directions with pictures, (but I wouln't use a switch).

:exactly:

i have changed the 2000 rev limit on mine with efi live but i cant find anywhere on my tune where to change the idle presets

Unwire whatever your Fast Idle is wired to.
Don't use a switch.

Connect the wire from the TCM to the Stop Lamp Switch, (mounted to and actuates with brake peddle depressed), to the end DK GRN/WHT wire.
This wire is only +12V when truck is RUNNING, transmission is in PARK, and the brake peddle is NOT depressed.
If you use a switch and you, (or someone else using your truck), forget the switch on when you drive away, it won't run well >2000 RPM.
Wiring to the DK GRN/WHT wire makes it a no-brainer.
Start truck, depress cruise control twice, and Fast Idle is engaged. The instant you depress the brake peddle to shift truck out of PARK, the +12V goes away, Fast Idle is disabled, and the RPM returns to normal 700ish RPM's before you're able to shift out of PARK.
As said above, www.kennedydiesel.com (http://www.kennedydiesel.com) has great directions with pictures, (but I wouln't use a switch).

Is that the wire for the BTSI interlock?

Is that the wire for the BTSI interlock?

This wire supplies +12V to the A/T Shift Lock Solenoid.

This wire supplies +12V to the A/T Shift Lock Solenoid.

OK, this mod would make good sense then. I never thought of that before.

Unwire whatever your Fast Idle is wired to.
Don't use a switch.

Connect the wire from the TCM to the Stop Lamp Switch, (mounted to and actuates with brake peddle depressed), to the end DK GRN/WHT wire.
This wire is only +12V when truck is RUNNING, transmission is in PARK, and the brake peddle is NOT depressed.
If you use a switch and you, (or someone else using your truck), forget the switch on when you drive away, it won't run well >2000 RPM.
Wiring to the DK GRN/WHT wire makes it a no-brainer.
Start truck, depress cruise control twice, and Fast Idle is engaged. The instant you depress the brake peddle to shift truck out of PARK, the +12V goes away, Fast Idle is disabled, and the RPM returns to normal 700ish RPM's before you're able to shift out of PARK.
As said above, www.kennedydiesel.com (http://www.kennedydiesel.com) has great directions with pictures, (but I wouln't use a switch).

I tried your trick.
You guys are genius. :D
Works great. I tested it with a volt meter first, you are right on the mark.
Thanks
Wags

How long did this take or should this take?

It may take roughly an hour depending on how well you are accustomed to wiring and connectors.

If you want the idle lower set B1901 to whatever you want. However this only leaves you with one high idle speed.

I also use mine as a theft deterrent. In Table B1902 "PTO FUEL LIMIT" set 0mph to about 25mm3 and then set the rest of the table at 0mm3. That way if you are idling your truck and someone breaks in and steals it, it'll only do like 1mph. Then you can meet Mr. Stealer with your trusty lead pipe :D

How long did this take or should this take?
Oops, hour or so
I'd second that...it actually took me longer to get the pin locally (for the ecm) than it did to do the rest. I went to the local dealer parts counter..don't have it. Called a second dealer..a HUGE distributor here in the midwest...don't stock it.
I called my buddy that used to work as a service writer. He told me to go see the service manager and ask to see their pin assortment. They WOULD have it. Sure enough..the service writer looked at me like I was stupid, but he asked a mechanic..he said' "of course we have them..her is the assortment, find the pin and go for it". I got 2 pins, no charge. Just took a little doing.
Wags
Good luck

Dang, i got charged 2 bucks for one terminal...oh well.

The more familiar you are taking your ECM off the faster it will go. It's a little scary pulling it off for the first time, but it all comes apart just like it should. Pretty slick mod when you're done too.

You don't want to change the idle speed even though you can - people that have done that have lost a stable high idle - it fluctuates quite a bit after you change it and stays that way even if you change it back. The high idle kits work great with the stock settings - no reason to mess with them.

i did the high idle mod today and tried wiring to dark grn/wht on brake switch with no luck hooked to a 12v source worked perfect so i used a test light an no power to grn/wht wire on my truck i even tried grn/blk nothin any ideas?

Check BTSI Fuse 10A, (located in Fuse Block Underhood). If this is blown, your shift Lock solenoid wasn't working and the Memory Seat option if you have it.


Here's the complete circuit description for the 2002.

-The +12V (Hot in RUN and START), goes to B/U LPS Fuse 25A, (Located in Fuse Block Underhood).
-PINK wire out of B/U LPS Fuse 25A goes into NSBU Connector 2, contact C.
-LT GRN wire out of NSBU at C2 contact B goes into BTSI Fuse 10A, (located in Fuse Block Underhood). This supplies +12V to memory seat option and +12v into BTSI Fuse 10A.
-LT GRN/BLK wire out of BTSI Fuse 10A supplies +12V to Memory Seat option and into Stop Lamp Switch at contact E.
-DK GRN/WHT wire out of Stop Lamp Switch supplies +12V to A/T Shift Lock Solenoid and your Fast Idle.

wow thanks alot i am gonna check into that tonight i forgot to say but u already answered it that i dont have to put my foot on the brake to take it out of park so hopefully its a blown fuse thanks alot you guys are awsome help

some of the other guys are right, u do have to put the pin in the engine ecm, if you want ur idle to be variable from 800 rpm to 2150rpm then you need to buy the PTO switch that goes in the dash next to the air bag switch and plug that in and then have your GM dealer turn on your PTO option on your computer if it has it, most pickups do, and then have them add the wire jumper from a certain spot under the fuse panal in the engine compartment to the engine ecm and it will work and then you can use your cruise control also to make it work. only costs about an hour at your gm dealer, if there smart enough to figure it out. good luck hope it helps

I have high idle on mine it's called a piece of wood and an electric moveing seat works good pretty cheap to!!

Just did mine last night. Hooked it to the wire on the brake pedal so I didnt have to mess with a switch, works perfect! Just make sure you get that dang pin all the way in the first time so you dont have to do it twice!

:exactly:

make sure the pin is in

i did the high idle mod today and tried wiring to dark grn/wht on brake switch with no luck hooked to a 12v source worked perfect so i used a test light an no power to grn/wht wire on my truck i even tried grn/blk nothin any ideas?

When you checked for +12V at DK GRN/WHT wire, did you have key switch in RUN, AND transmission in PARK, AND brake peddle NOT depressed?
If so, retest or replace BTSI Fuse 10A.

Sent you a PM. Seems there's two DK GRN/WHT wires on two different "Brake Switches".
You want to hood up to the DK GRN/WHT wire on the six pin connector on Stop Lamp Switch, (normal brake peddle), and do NOT hook up to the DK GRN/WHT wire on the two pin connector of the Parking, (or Emergancy), Brake.

I went to hook up my high idle, had all the crap apart went to push the pin though the connector and the f-ing pin breaks. I got it off a vendor here but cant remember which one so I cant contact them.
Went on GM parts and they want 1.81 but s/h was outrageous.
I have the wire and snap connector and wire loom just need an end.

Does anyone have an extra end they can send me?

yea i was checking the grn/wht on the brake switch in park and ignition in run .no power but i hooked it up anyway.checked those fuses you told me too those were all good next morning got in and it did not shift right out of park like it has been(with no brake)so i tried my switch worked.i have since tried it a bunch of times has not worked since so i took it to the stealer.but i did get the abs fixed i did ground it out with test light put in new fuse ever thing was fixed thanks alot

what keeps the high idle off when using the cruise control on the road? (with the brake 12v power) (talke slow I am stupid)

what keeps the high idle off when using the cruise control on the road? (with the brake 12v power) (talke slow I am stupid)

I believe once the brake pedal is pushed and/or the truck is shifted out of park it's automatically disabled and cant be enabled unless the truck is in park.
If the high idle is put on a switch rather than the cruise control then the switch needs to be shut off or the truck wont go over 2200rpm.

the grn/wht wire on the brake switch only has 12v when key is in run or truck running and transmission in park as soon as you touch brake pedal it kills 12v an you put in drive and release the brake the 12v is still dead untill you put transmission back in park and let off the brake. so the wire is only hott in park with truck running.so when your goin down the highway in drive the high idle is not live so you hit cruise and it acts as normal hope this helps thats how i understand it

So if you have nsbu switch issue it could display multipul symptoms, sounds like fun!

will this 12v brake wire work on a 6-Speed? If not how can I do this with out a switch? Thanks for the reply.

will this 12v brake wire work on a 6-Speed? If not how can I do this with out a switch? Thanks for the reply.

NO.
The ZF-6 Manual 6-Speed does not have a NSBU contact, the Brake Peddle Stop Lamp Switch, or the Shift Lock feature. These two contacts in series supply +12V to the Shift Lock Solenoid to prevent shifting transmission out of PARK, when key switch is in ON, and brake peddle is NOT depressed.

CAUTION: All info below is based on Helms 2002. I do not know if your 2003 is wired simular. Wire at your own risk.

I came up with a circuit, using one momentary N.O. pushbutton, (electrical contact is normally open, and closed ONLY when pushbutton is depressed), and one 12V NO SPST Relay, (which has one normally open contacts). The pushbutton will be easy to find, but the 12V SPST relay with an electrical plug with wires will take a little looking for.
The electrical connector on your Clutch Peddle Position Switch has six contacts, (A-F). The F contact has a Gray wire.

This wire should be +12V when truck is in RUN and when the clutch is not depressed.
racer28. Please verify this GRAY wire condition.

One side of the pushbutton switch is connected to the GRAY wire, the other side to the relay coil. The other side of relay coil is connected to GRD.
The normally open contact of relay is wired across the momentary pushbutton contact. This contact acts as a "lock-in contact". When you depress the momentary pushbutton, the relay coil energizes, this lock-in contact closes, and when the pushbutton is released, the +12V is maintained to the coil through this closed lock-in contact.
The +12V side of the relay coil can be used as the +12V source for your Fast Idle Mod.
All of this +12V is supplied from "Brake Fuse 10A", located in Left Instr Panel Bussed Electrical Center.

To activate Fast Idle:
-Apply parking brake, start truck as usual with clutch depressed, shift transmission to neutral, release clutch, and +12V is available to the GRAY wire.
-Momentarilly depress Fast Idle Pushbutton.
-Depress Cruise Control Pushbutton two times to initate Fast Idle.
-When ready to shift transmission, depressing clutch peddle opens the E-F contact of the Clutch Position Switch, the GRAY wire drops to 0V, and idle will reduce to normal 700ish RPM's before you get trans into gear.

Sorry this was wordy. If I was smart enough to scan documents, a schematic diagram would have been much easier to understand. :(

WOW!!!! Thanks, I will check this out. I will let you know.

Will this mod effect EFI Live tuning? Since you have to unplug the TCM/ECM?

It shouldn't.

I have high idle on mine it's called a piece of wood and an electric moveing seat works good pretty cheap to!!

How do you do that from inside while you're eating breakfast? With my Astrostart and the Hi Idle mod, I don't even have to go outside to make it happen!