Jump to content

PCM Loacation on an 05 Silverado

VTX

Recommended Posts

VTX New Member

VTX

Posted
Posted

Hi guys I am expecting my PCM from wait4me any minute now and I am anxious to get it put in but i have two questions.

 

1) Where is the PCM in my truck 05 Silverado 4x4 Extended Cab SB with a 4.8L

 

2) What tools will I need to uninstall the old one and install the new one.

 

Thanks in advance for any help that you can provide.

Phil

OLERED04 Enthusiast

OLERED04

Posted
Posted
Hi guys I am expecting my PCM from wait4me any minute now and I am anxious to get it put in but i have two questions.

 

1) Where is the PCM in my truck 05 Silverado 4x4 Extended Cab SB with a 4.8L

 

2) What tools will I need to uninstall the old one and install the new one.

 

Thanks in advance for any help that you can provide.

Phil

 

 

 

If its like my 04 the pcm is just to the left of the batt if you are looking at the truck. As far as removal there is a black plastic cover that will pop off. After that on mine there was a metal clip, kind of like comes on some air filter housings that pops the pcm loose. Then all you should need is a nut driver to loosen the connections I can't rember the size but its not very big. Just remember to not over tighten when you put it back. All this hold true for my 04 hopfully the same for you, if not I'm sure someone will correct me. :D:D

JimG Enthusiast

JimG

Posted
Posted

Assuming GM didn't change anything - it's a 7 mm nut on the PCM connector. Make sure you fully unscrew it or you'll never get the connector out. Also, not sure if this is true of that model year, but my '03 had a red gasket to keep water and crud out of the connection. Make sure that comes off in one piece and goes back on as well.

Ag96 Enthusiast

Ag96

Posted
Posted

Here is a link to a Westers salesmans site, but towards the bottom of the page there are pics and instructions for removing the PCM.

 

PCM Removal

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Tommy 1960
      Magnetic ride struts

      By Tommy 1960 · Posted

    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      Well if you insist.
    • diyer2
      OCI, not when but why?

      By diyer2 · Posted

      You have to have the last word. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I am sure that was quite the pass experience and not a great place to experience during the winter when the conditions are not good. I've seen video of that pass and also more detailed information and pictures about the wrecks at that one hair pin turn where tractor trailers have flown right off the cliff and I am sure from all the warning signs that you know the exact curve that was !. After all there is a reason why a song was made about Wolf Creek Pass !. By the way and I didn't realize this either when I bought my truck as its nothing I even thought of that would be programmed into the cruise control and this occurs in either the basic or the more advanced cruise that controls your distance behind a vehicle and that is the brakes going down a hill are being applied as soon as the vehicle goes a certain speed over the set cruise speed. While it certainly does force downshifts in the transmission as you found out with cruise on while going down hill, its also dragging the brakes as needed to keep the speed controlled to what the cruise was set to. For me, I find that unsettling simply because I have no concept then as to how MUCH brake input is being used a and just how hot are those brakes getting and the wear factor as well. I can see that system getting a person into trouble on long mountain grades while pulling a trailer as it would not only be standing on the brakes of the pickup without any driver input, it would also be automatically applying the trailer brakes and it could cause a run away unit by overheating the brakes. Its one thing on a shorter hill and if the driver allows it to do its thing but on a long mountain grade is where things could get so out of hand. As someone a while back on this forum said, they had someone following them at night I believe on a down grade and had the cruise set and the person behind them could see the brake lights being energized all the way down the hill. I figured when I saw your comment that you didn't know and would have no way of knowing that your truck was applying the brakes and that you would and rightfully so assume you only used the brakes when you pressed on the pedal to slow down more than the cruise set speed for the slower sharp curves. So its good knowledge to know this about the newer GM trucks, certainly when doing any descending on long mountain grades. In the future try kicking off the cruise and use the the manual mode on a pass to see what that is like as I know myself when I first experienced it I thought no way can this engine be holding me back this well and tried the same hill in manual mode and sure enough the engine was revving way up and still could not hold the trucks speed down like it could in cruise mode.    Fuel mileage, that is where a really low sleek type of car can do better at higher speeds, certainly it starts sucking fuel too but a tall pickup is pushing massive amounts of air and also allowing a lot more air under it and the tow mirrors as in elephant ears pushing through the wind  as well. Driving like grandpa is about as good as one can do when driving one of these if trying to get the best fuel economy they can. I bet these trucks would get the best mileage they can if driven on a freeway in Florida if not busy traffic at a sedate speed and that sea level elevation without hills, vastly different then Colorado !. 
    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      It’s over for almost 24 hours. Are you playing Eddie Haskell? 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...