The cast-iron lower control arm has been bolstered to handle greater loads. In the front suspension, the upper control arm is now made from forged instead of cast steel for increased strength and weight savings. There are a total of 11 different frame assemblies, depending on cab configuration, wheelbase, weight class and whether it’s a pickup or a commercial chassis cab. The engine mount brackets have been strengthened, and their positions supporting the engine are optimized so that the brackets’ attachment points are now set relative to the center of the frame rail instead of offset at an angle, which had caused unwanted engine vibration. The stronger frame is also said to help reduce noise, vibration and harshness, particularly up front. Maximum payload is up to 6,335 pounds with the DRW 6.0-liter gas V-8 and up to 5,724 pounds with the DRW 6.6-liter Duramax V-8. GM says the towing specs were calculated using the new J-2807 trailer towing standard that all truck manufacturers will eventually follow. Maximum trailering is up to 20,000 pounds pulling a fifth-wheel trailer with a DRW Duramax diesel and up to 14,500 pounds pulling a fifth wheel-trailer with a SRW 6.0-liter gas V-8. GM has Ford’s once-untouchable specs right in its crosshairs. Much of the frame improvements were aimed at giving the 1-ton 3500 Silverado maximum towing and hauling capability in the segment. The front stabilizer bar link that connects the stabilizer bar to the lower control arm is carried over from the 2007-10 HD pickup. What’s changed underneath? A better question is what hasn’t. Unfortunately, the bolt pattern on the new wheels is slightly different from the 2007-10 trucks, so you can’t retrofit the new wheels onto the current pickups. The dual-rear-wheel tires remain 17s, but they now can accommodate a taller aspect ratio tire - up to LT235/80R17 from today’s LT225/75R17, something many GM HD buyers have been asking for. New for 2011 is a choice of 17-inch standard or brand-new 18- or 20-inch wheels for single-rear-wheel trucks. Also, the inlet in the middle of the front bumper that feeds air to the truck’s transmission oil cooler is about a third larger than the current inlet. Huge metal flares at the corners of the front bumper have been softened by reducing their height. The chrome-framed grille has a larger bow tie, and the front bumper has been revised. The traditional Chevy power dome hood is back with the strongest styling we’ve seen since 2003. Continued abuse of our services will cause your IP address to be blocked indefinitely.The 2011 Chevrolet Silverado Heavy Duty might not look all that different from the outgoing model on the outside - much like its parent company might not look significantly changed to a casual observer - but underneath, almost everything has changed. Please fill out the CAPTCHA below and then click the button to indicate that you agree to these terms. If you wish to be unblocked, you must agree that you will take immediate steps to rectify this issue. If you do not understand what is causing this behavior, please contact us here. If you promise to stop (by clicking the Agree button below), we'll unblock your connection for now, but we will immediately re-block it if we detect additional bad behavior. Overusing our search engine with a very large number of searches in a very short amount of time.Using a badly configured (or badly written) browser add-on for blocking content.Running a "scraper" or "downloader" program that either does not identify itself or uses fake headers to elude detection.Using a script or add-on that scans GameFAQs for box and screen images (such as an emulator front-end), while overloading our search engine.There is no official GameFAQs app, and we do not support nor have any contact with the makers of these unofficial apps. Continued use of these apps may cause your IP to be blocked indefinitely. This triggers our anti-spambot measures, which are designed to stop automated systems from flooding the site with traffic. Some unofficial phone apps appear to be using GameFAQs as a back-end, but they do not behave like a real web browser does.Using GameFAQs regularly with these browsers can cause temporary and even permanent IP blocks due to these additional requests. If you are using Maxthon or Brave as a browser, or have installed the Ghostery add-on, you should know that these programs send extra traffic to our servers for every page on the site that you browse.The most common causes of this issue are: Your IP address has been temporarily blocked due to a large number of HTTP requests.
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