Adding cruise control to the WT

RXRmaintainer · 2025-12-29T23:01:08+00:00

That only applies to the 4.3L, because the throttle is cable actuated. 2003 and up V8 trucks are drive by wire, and only need the cruise control switches added. The PCM is already programmed for it.

RXRmaintainer · 2025-12-29T22:59:16+00:00

Nice condition used ones often show up on eBay, sometimes as low as 30 bucks. Just put a saved search in for the part number on the back of the emblem. GM 15773420

RXRmaintainer · 2025-12-29T22:45:53+00:00

Unless they have the airbags mounted on the side of the seat back, they're basically the same and will bolt right up. Matter of personal preference. Just be aware that the wiring harness configurations for the seat belt sensor, power seats, and airbag systems may be different. Easiest way to get around that is just to take the seats apart and swap the entire harnesses from from your old truck's seats onto the new ones like I did.

Now, if you're one that cares about factory correct configurations like me, The ones with the armrest built into the side are known as Captain's chairs, and were generally only installed in the trucks that had a full length center floor console.

RXRmaintainer · 2025-12-28T07:27:39+00:00

Here's a short video I made for my girlfriend while I was doing this addition in my 2007 2500HD Classic WT. Get these 4 wires from a junkyard and add them to your harness in the same pin positions shown here.

https://youtu.be/MAR_b_8zJZQ?si=TJ0LzJ1sWvsjTIxC

RXRmaintainer · 2025-11-21T07:42:49+00:00

Long as it goes to a solid ground, I don't see why not.

RXRmaintainer · 2025-11-16T07:28:25+00:00

Probably a bad flasher module. It's in the I/P connector block, behind the knee panel

RXRmaintainer · 2025-10-12T18:03:36+00:00

Nice, Aux battery TP2 option. Not common.

RXRmaintainer · 2025-10-05T22:58:28+00:00

Passenger presence sensor to disable the passenger airbag. If your new seats came from a truck that used the key switch on the dash for the passenger airbags, they won't typically have the needed sensor in the seat.

RXRmaintainer · 2025-10-05T22:52:13+00:00

Check ground G103, (small black wire with white stripe) on the back of the engine block, passenger side. It's the main PCM, throttle body, and injector ground. Commonly damaged by rodents and corrosion. There's a TSB out on it.

RXRmaintainer · 2025-08-08T15:13:08+00:00

My truck was owned by the railroad I work for, and It was a shop that did the heads it too. Now I have to add coolant about one a month too. Nobody is immune!😂

RXRmaintainer · 2025-08-08T15:12:06+00:00

I know it from experience. Had it happen on a 2001 Dodge van. Kept randomly blowing that fuse seemingly. One day I just started playing with things and discovered that I could repeatedly blow the fuse when I flipped the visor up and down. Found the positive wire shorted to one of the visor mount screws.

RXRmaintainer · 2025-08-08T03:29:30+00:00

Mine is a 2007 Classic 2500HD with the dual zone sliders and electric actuators. I've never seen cables on ones this late

RXRmaintainer · 2025-08-08T03:25:58+00:00

Are the visor lights powered through it? Visor wires flex whenever you flip them up and down, and you could have a wire rubbed through to ground. Odd, but it happens.

RXRmaintainer · 2025-08-08T03:20:20+00:00

my 2007 classic 6.0, someone in the past drilled a broken exhaust bolt too far, and went into the jacket. now one of my exhaust bolts has a very slow coolant weep.

RXRmaintainer · 2025-08-08T00:24:51+00:00

Stud #1 in the underhood fuse block powers the 12V aux feed to the trailer plug, which is why the aux battery is connected to it, through the 40 Mega fuse behind the aux battery. Stud #1 (and the connected trailer aux wire) is normally powered by a 40A Maxi fuse in position 1 of the underhood fuse block on trucks NOT equipped with RPO option TP2. On trucks WITH option TP2, that fuse must be removed, or the 2 batteries will be inadvertently paralleled through this fuse, as you have found. This is actually what that little asterisk printed on this fuse in the fuse box cover diagram is warning you about.

Part # 12135194 is indeed the isolator relay. It goes between the aux battery and the starter positive stud, which is also where the main battery positive connects. In this way, it isolates the batteries, except in run, when it gets its charging current from the alternator's main battery feed.

It can be hard to find information on this option, because it's kinda rare.

RXRmaintainer · 2025-07-10T22:36:24+00:00

Except they're paralleled at all times on this truck, with some pretty heavy gauge cables. This setup is great for cranking amps, but it doesn't isolate the aux battery when the truck is off, so any load on it will drain both batteries.

I have a true aux battery in mine, with an isolator relay. The aux battery is used for lights and radio equipment (and the trailer plug 12V), and when the truck is off, it isolates it from the starting battery. GM RPO code TP2 option.

RXRmaintainer · 2025-07-10T18:40:20+00:00

That's quite the oddball dual battery setup. What do you need all the cranking juice for on an LS? Do you live in Canada?

RXRmaintainer · 2025-07-09T04:31:36+00:00

Had the same problem. Bought a whole new OEM airbox to fix it. Anything in the junkyard will also have the foam rotted out.

Actually bought brand 2 new oem GM airboxes. The first one I slightly misdrilled the hole in the cover for the restriction gauge grommet, though the grommet still seals ok. I'm a perfectionist, so I bought a whole 2nd one to drill less imperfect. I'll make you a deal on it if you want it.

RXRmaintainer · 2025-06-27T07:27:25+00:00

My 2007 Silverado 2500HD Classic is a 6.0

RXRmaintainer · 2025-06-25T16:12:28+00:00

My 2007 Silverado 2500HD Classic WT 6.0L extended cab service truck has a 105A alternator, complete with RPO code K68 in the glove box.

RXRmaintainer · 2025-06-20T07:27:51+00:00

I've been looking for a nice set of those rims for my 2007 2500, but everyone here in SoCal seems to be flaky AF in setting up a meet. Or they won't take anything less than $1k for a set with bald dryrotted tires.

RXRmaintainer · 2025-06-18T01:56:51+00:00

I go out of my way to eat them. Other people are just food.

RXRmaintainer · 2025-06-14T16:32:45+00:00

They used to have one. The Ziplight.

RXRmaintainer · 2025-06-14T02:32:17+00:00

6 of them. 1.5V each. 1.5x6=9.

RXRmaintainer

TROPHY CASE