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Chevy Silverado/GMC Sierra - Owners hangout

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  • Amen to all of your points. If I could afford something like that, the only other "feature" I'd like to see is complete compatibility with the rest of the truck's electronics (Onstar, etc.). Since so much of the onboard systems actually rely on the Delco head unit now, most aftermarket upgrades require "relocating" the factory head unit if you want to keep other functionality working (other meaning everything besides audio). It'd be cool to be able to remove the Delco stuff and still keep all that, wouldn't it?
  • sebring95sebring95 Posts: 3,233
    Well.....The 265/70's probably feel good because they're 1.25" wider than the 235's. Plus they were only about .75" taller, so they shouldn't have hurt performance too bad. The 265/70-17 is going to add another 1" in tire diameter, but change nothing in width. Hard to say exactly what this will do to the handling because of the tire type change. If the Duellers are A/T's you'll probably lose a little handling and you'll definitely lose some power. Not sure if it will be enough to bother you, depends on which engine and gears you have. Overall, your tires are 1.75" taller than the originals, which means your speedometer will be off about 5.5%.

    I switched out my 245/75-16 junkyears for 265/75-16 A/T's. It reduced the power on my truck, but it does ride/handle much better. My dealer reprogrammed my speedometer for about $35.
  • pcolapcola Posts: 4
    Hi folks .. new to the forum and need your help.
    I just purchased a new 2004 LS extended cab that I'm truly in love with but .. took it on it's first open road trip last weekend and a big problem raised it's ugly head. Once the speed reaches 50 m.p.h. and above the roof sounds just like hard rain does on a tin roof of a barn.
    I know this seems strange but I had my oldest son with me and he felt all around the windshield, doors, and windows for air leakage and found NONE. I even check the antenna monuts on the roof (XM & Onstar) but they were not loose either ? So I'm stumped on this one, yes it's headed to the dealer tomorrow. I spoke with the service manager and he's never heard of such a thing either. I've been pulling a wrench for 30 years myself and this is a new one on me (especially with a new truck) ! It sounds just like your standing under an old tin roof of a barn during a rain storm.
    If any of you folks have ever heard of this please let me know.
    Thanks
  • pcolapcola Posts: 4
    Hi folks .. new to the forum and need your help.
    I just purchased a new 2004 LS extended cab that I'm truly in love with but .. took it on it's first open road trip last weekend and a big problem raised it's ugly head. Once the speed reaches 50 m.p.h. and above the roof sounds just like hard rain does on a tin roof of a barn.
    I know this seems strange but I had my oldest son with me and he felt all around the windshield, doors, and windows for air leakage and found NONE. I even check the antenna monuts on the roof (XM & Onstar) but they were not loose either ? So I'm stumped on this one, yes it's headed to the dealer tomorrow. I spoke with the service manager and he's never heard of such a thing either. I've been pulling a wrench for 30 years myself and this is a new one on me (especially with a new truck) ! It sounds just like your standing under an old tin roof of a barn during a rain storm.
    If any of you folks have ever heard of this please let me know.
    Thanks
  • mitzijmitzij Posts: 612
    They may need to reseal the outside windshield moldings, or replace them. Reference technical bulletin #04-08-48-003. We have been resealing them, the bulletin recommends replacement. This may be a different noise than what you describe, but it sounds like the same trouble.
  • boomer1bboomer1b Posts: 348
    Do you have a add on bug deflector ?

    If so thats the problem..................
  • p100p100 Posts: 1,116
    I tend to agree that the problem is with one of the windshield moldings. I had a similar annoying problem with my 95 Nissan pickup. At speeds around 45 MPH and higher, I started hearing this annoying, very loud buzzing sound, which sounded like an angry giant bumblebee trying to escape. After much searching, I found out that the source of the annoiying noise was peeling clear plastic film on the upper windshield moulding. The film would flutter in the wind and produce this annoying, almost unbearable buzzing noise.

    In case of your Silverado, one of the mouldings may not be sealed properly and impact against the windshield frame as air speed increases.
  • I have a 2003 Chevy Silverado 2500 HD with the 6.0 L engine. I have 285/75 Dueler M/Ts on it. I bottomed out on a set of RailRoad trax not to long ago and blew out the rear shocks. I have replaced them with Edelbrock IAS shocks but feel that they are too stiff. What type of shock have you found to be the smoothest and best ride quality on the highway?
  • pcolapcola Posts: 4
    Sounds like a real possibilty to me. I will make mention of it to the sevice writter tomorrow when I drop it off.
    Thanks for the info.
  • pcolapcola Posts: 4
    Yes it does have a bug deflector on it, don't know when the truck started making this sound at higher speeds because I hadn't taken it on a road trip until last Friday and the speedo had not seen 55 in town.
    Any particular reason the bug screen could be causing this sound, I have bug screens on all of my trucks and have never encountered this before ? Maybe a difference in the cosmetic designs?
    Thanks
  • Thanks for the reply. I have put the new tires on and yes I feel that the new tires are not as good on performance. Not as bad as the original but just slightly worse than the previous 265/70/16. Oh well, I guess I can't complain seeing that I got these brand New for $350.00 with rims and everything. As far as truck performance, I'm not that much of a lead foot and I think that the truck is trying to "learn" the increased effort to gain momentum. 80 mph does not feel comfortable driving as before. I know that I'm off on the odometer and that the new 80 mph is probaly closer to 85 but It just doesn't feel "right" Do you think It would be better to reprogram the Transmission? I have a 4.8 with 3.73 locking rear.
  • sebring95sebring95 Posts: 3,233
    I don't know about reprogramming the tranny. Mine was flashed due to a "clunking" problem and it helped. Although now it feels slower to downshift, which doesn't help the lower-power from the big tires. Oh well, it's just a run-around truck anyway. I would at least have them reprogram the speedo. You might consider one of the custom programmers though. They come with a speedo adjustment, tranny program, as well as power programs. I'm not sure what the true gain in power would be, but you might find that a better investment than paying the dealer just to reprogram the speedo. If I was keeping this truck long-term, I'd buy one.

    BTW, I've got the same truck basically, 4.8L, 3.73, ext. cab 4x4. I probably wouldn't buy the 4.8L again, the 5.3 in my Tahoe is a much better motor IMHO. I don't think there's much difference in MPG either. The Tahoe always gets better mpg, but it's used on the highway more so it's not easy to compare. The truck usually doesn't average over 16mpg.
  • boomer1bboomer1b Posts: 348
    Thats your problem ! Take it off and try it out.
    If no noise with it off....thats the problem!

    Then you will do the windsheild surround reseal.

    Search back thru this thread. There are posts on how to do it yourself.
    Poss. one of the folks here who have done it can post and explain it fully for you.

    EDIT......Check Mitzis post #4489 for the windsheild reseal TSB #
    and give that to the dealer if you want them to fix it !

    Thanks Mitzi........I missed your post on it !
  • obyoneobyone Posts: 8,065
    I had upgraded from stock to the Edelbrock IAS and also found it way too stiff for my liking. I changed to the Bilstein HD and have been very happy since. Plus they are cheaper than the Edelbrocks.
  • Thats what I thought. I had a lifted Z71 Tahoe with the Bilsteins and enjoyed the ride, but wasnt sure if there was a different shock that would ride as good on the Silverado
  • I have a 2003 Silverado SS and I had a problem where upon quick acceleration, the RPM's redlined and the truck didn't go. I had to have it towed to the dealer who said they had to replace the shift solenoid. Problem happened again recently. Has anyone experienced a similar problem? Truck only has 11,000 miles on it.
  • nb2169nb2169 Posts: 35
    I wonder if the truck is running up against the rpm limiter?
  • Thanks for the reply, it really has me puzzled. I am bringing it to the dealer on Monday. I will ask them about it when I drop it off.
  • I have a 2003 silverado z71 and dont like the way the tires look. they look very small,(265 I believe) any recomendations on increasing the hight o the tire, what size is taller, and will I have to change the computer.
  • ram5ram5 Posts: 12
    I have a 2000 Silverado 1500 with 84,200 miles. It is leaking some motor oil. It seems that it is coming from the front crankshaft seal and from the rear seal. I think this is a little to early for the seals to start leaking. Is there any crankshaft seal recall by the manufacturer? Or, What are some suggestions to fix this problem?
  • kg11kg11 Posts: 530
    I believe you have 245s on it like I had on my 2500HD. I switched to 265s and it looked a lot better. I actually lost a little fuel economy. Some people here have switched to 285s without lifting the truck. Maybe one of them can tell you more.

    kip
  • ricschricsch Posts: 540
    In case anyone may be interested, I have a 4-Hi light kit that is to fit '99-02 Silverado and GMC Sierra trucks. This keeps the low beam lamps on when you put the hi-beam lamps on. Sold the truck a few years ago, so if interested check this link: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&cate- gory=33710&item=7937029278&rd=1&ssPageName=WDVW
  • boomer1bboomer1b Posts: 348
    Where is everybody?

    04 Chevy 2500HD 4x4 x-cab............Finally got the snowplow on in time for winter.
    Pushes snow real good! No warranty or dealer visits either........

    Hope it works as hard as my 01 !

    Ricsch....There is a sticky on another full size chevy truck forum to do the 4 way headlights on at once for less than 2 bucks !
  • If after you change your tailgate straps to the Chinese versions and notice that one seems a little slack check the bottom hinge pivot and socket on that side to see if it bent whilst the strap broke. If bent march over to the Generals store and demand new pivots and sockets damaged as a result of the broken strap also claim any tgate damage as a result of the same.
  • I also have a terrible road noise on the drivers side behind my left ear. The dealer won't address it so I've done some research on my own. The exhaust air vents are located on the pillars on both left and right lower sides of the inside cab. I checked with parts and there is a pressure pressure valve in and beyond the vent. When you get positive pressure in the cab from the fan motor carring warm or cold air the valve will open. The vents are open to the outside underneath to the right and left of the back side of the cab.Stuff some insulation in the opening. If the noise goes away then you now the valve is stuck open. Getting rid of my lousy wrangler ST tires did a world of good to start with. Now getting a dealer to take all the paneling off to fix the problem is another thing!
  • ryanbabryanbab Posts: 7,240
    Well I finally got the brackets last Monday. Got a chance to put them on today. Very easy install took about an hr and a half (it was cold so that slowed me down a bit). The bars are the lifetime westins (oval bars)

    Heres some pics

    http://www.gm-trucks.com/forums/uploads/post-56-1101668968_thumb.- jpg

    http://www.gm-trucks.com/forums/uploads/post-56-1101669008_thumb.- jpg

    http://www.gm-trucks.com/forums/uploads/post-56-1101669068_thumb.- jpg

    And a pic of my new utility box

    http://www.gm-trucks.com/forums/uploads/post-56-1101669150_thumb.- jpg
  • rayt2rayt2 Posts: 1,208
    Boomer, how much snow ya got up in that neck of the woods now ?? Or was it all just rain like we got 300 miles south of you!

    Ryan, Bars look good, what happened to the old ones? Mine rusted thru and Westin sent me free replacements under their 5yr. warranty. I opted for the chrome version this time instead of black since they said the chrome version holds up better to the elements.

    Ray T.
  • ryanbabryanbab Posts: 7,240
    The old bars rusted. Really only the pass side. I sprayed rustoleum for awhile then it wouldnt hold anymore. Also the brackets rusted pretty good
  • boomer1bboomer1b Posts: 348
    We got about 4 inches of wet and heavy on the 26th. Finally got to try out the 04 plowing. It did ok and is waiting for more !
    Heck, Just turned 5k miles. Been under the weather still but feeling better and still not driving much!
    No dealer or warranty issues yet !............
  • ricschricsch Posts: 540
    Yeah, I seen it too, may work fine, but if it were that easy and safe, why do the companies that make them have more components involved? I for one would like to see how they ground out the low beam to make all 4 lights come on.

    Sometimes worth a couple more $$ to do it without any issues.
This discussion has been closed.