Jump to content

Ecm Update For 08 Silverado

Mossyoakglock

Recommended Posts

Mossyoakglock Senior Enthusiast

Mossyoakglock

Posted
Posted

I bought my truck back in December of '07, it's an 08 Crew Silverado 4x4 w/ the 5.3L. Since it was built, I'm assuming there have been some updates on the programming and computers on these trucks. Could I go to the dealer and have them update the ECM on my truck? It runs good, but there is just a little bit of a shudder at idle (needle barely moves, I can just feel it in the seat) and it has a funny shift at time when I'm rolling to a stop and then press the gas. It's hard to explain, it's almost like it wants to downshift to 2nd, but then decides to go to third. It's maybe in 2nd for a half second.

 

Is it even worth taking it to the dealer to have them upload the new programming on my truck, and about how much would they charge to do that? Would I see any benefits to this?

Stevens03 Senior Enthusiast

Stevens03

Posted
Posted

I don't think the dealership will just re-flash your computer. If there was a specific problem, they might, but in some cases you could cause more problems than help. I'd talk to the dealership and see what they say about it.

Mossyoakglock Senior Enthusiast

Mossyoakglock

Posted
  • Author
Posted

It's still in warranty as I only have 26K on the truck. I don't have any problems, I just wasn't sure if it was just something that you can have done or if you have to have a reason/problem to have them reflash it.

 

I read where somebody that their computer reflashed that helped some shifts on his truck, but other than that he didn't have many problems with it.

 

I just wasn't sure if it was worth having it done if nothing was acting up or wrong. I know in the Dodge/Cummins world that they have updates and flashes every once and a while that you can have done whether or not you have a problem.

C. Charles Hahn Senior Enthusiast

C. Charles Hahn

Posted
Posted
I read where somebody that their computer reflashed that helped some shifts on his truck, but other than that he didn't have many problems with it.

 

Probably that was for an early 6-speed auto.... those did get updates from GM.

2k8Vmax Enthusiast

2k8Vmax

Posted
Posted

My 08' VortecMax had the same idleing problem and weird shifting, also on a very slight up hill at a steady part throttle (45-55 mph) it had what almost felt like a miss. The dealer said the idle was norma, they didn't notice any shifting problems, and they couldn't reproduce the "miss". So they didn't do anything for me. I had a blackbear tune done just after that and it pretty much fixed all three problems. its definately worth the money for the tune.

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • clowe1243
      6.2L L87 Powertrain Engine Noise (Lifter Failure) Question

      By clowe1243 · Posted

      Got the truck back today.  Called them yesterday to get an update, and miraculously my truck is finished?!?! The $13k out the door was complete bullshit!  Ended up being over $14k.  They added some bullshit service bulletin that I cant even find, where they replaced my radiator without telling me or asking me, and charging me for it.  Need to do more research into it, cause they leaked the first delivered radiator was ran over by FedEX.  Sounds like bullshit to me. 2.5 Months for an engine swap, which ended up being remanufactured, not new; ****ing ridiculous.  Brakes are squishy as hell, not sure if its from sitting.  Will give a couple days to see it that figures it self out.  GAVE IT BACK TO ME WITH 1 GALLON OF GAS!  Just filled the tank the day before drop off, more bullshit.  My dash cam SD card was formatted, not really much I can do about that. 3 year, 100k GM warranty at least.  Time to sell it and say **** off to GM.  Bad experience.  Cant wait for the survey email to come through.  Overpriced Raptor R, here I come!
    • haoleboyZ71
      Radio Update

      By haoleboyZ71 · Posted

      If I forget the phone in the truck, and forget the truck in the phone, and reconnect.  It works great for the day.  Truck sits overnight, and the next day is a no go.  It will connect Android Auto via usb cable, but not bluetooth.   Ive tried Everything in this thread so far, and nothing works for more than a day.   I think I might have to go to the dealer and have them flash the pcm.   thanks for all the suggestions guys. 👍
    • Bill Lemmond
      primary drive belt tensioner

      By Bill Lemmond · Posted

      2022 2500HD Crew Z71 Duramax single alternator.  Recently had the primary (water pump / fan) belt tensioner pulley bearing to fail while hundreds of miles from home of course the plastic pulley melted and belt shredded which took out some wiring. Found a replacement tensioner assembly and belt to continue now would like to find a replacement for just the pulley and bearing to have a spare assembly in case of a repeat, the rest of the tensioner is fine. Has anybody here found a correct replacement part for just the pulley and bearing? Any help is appreciated.
    • Atlas
      Upgrade to a 2026 AT4 with the 3.0L Duramax

      By Atlas · Posted

      +1 for the 3.0   Perfect for 1500 pickup towing duties.   Perfect engine for a 1500 pickup period. Huge torque at stunningly low RPM makes it feel a lot lighter than it is. The fuel mileage is insane for a tall and heavy 1500... 30+ on the highway. Mid 20's around town.   It's probably not perfect if you bought a 6.2 for the braaaaaaapppppp V8 noises and wrapping it out to 6k. The LZ0 acts and sounds like a small turbo diesel and there's nothing you can do to make a small turbo diesel sound like a big one, and you can't make an inline diesel sound like a V8 diesel/big Duramax. It's a different driving experience altogether.   Drive one, I think you'll like it, though...
    • TheRiver
      Metal shavings on dipstick and filter

      By TheRiver · Posted

      I'll bet your truck lost the bearings on a roller on 1 of the lifters, and now is wiping out a cam lobe.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...