Retired Bob

Just saw that there is a bulletin "Vibration Analysis Worksheet" 03-00-91-001G for 2015 trucks and earlier. I don't know what this is about because I have not see this 'worksheet', but the title seems to apply to the vibration issue. Dealers will normally show these document to you if you ask. If you read the 'worksheet' and find some useful info - post what you find.

Yep - still reading this thread because I tell anyone who bought (or is looking to buy) to check for rust and if they have rust I tell them about this thread to read!

pm26, interesting comment. I use to work for a very large company where 'cost improvement' suggestions were strongly encouraged - and rewarded. As a supervisor of a department where the employes would rather work then make up suggestions, I had to 'think up' suggestion for my department. It is very easy to make up things on almost any subject - don't clean rust off frames before spraying wax and see if the customers complain, etc. It's the number of 'suggestions' that upper management could show illustrating that cost improvements were important to the company, rather then the quality of the suggestions. Quantity always won over quality - but occasionally there was a valid suggestion.

Rough idle or vibration: http://sandyblogs.com/techlink/?p=3780 Also saw this: Condition Some customers may comment about a squeak noise coming from the rear of the vehicle. During normal operation, certain vehicles may exhibit a squeaking noise that may be traced to the rear leaf springs. While this noise is an operating characteristic of leaf springs, the frequency and severity of this noise will be affected by the roads that the vehicle is driven on. Cause This condition may be due to debris getting between the leaf springs. Correction To correct this condition, lubricate the rear leaf springs using the following procedure. Important: It has been found that the application of grease to the rear leaf springs does a better job of preventing the noise from reoccurring than replacement of the spring. Raise the vehicle on a frame lift-type hoist. Inspect the springs for damage. If none is found, proceed to the next step. Pressure wash the rear leaf springs to remove as much dirt and grit as possible. Dry the springs with compressed air. Apply a liberal amount of grease, P/N 12345996 (in Canada, use P/N 10953501), under the front and rear tip inserts for the #2 and #3 leaves, on top of the tip inserts, and in between the #1 and #2, and #2 and #3 leaves, as indicated below. A screwdriver can be used to gently pry up the tip insert; however, a rag around the screwdriver must be used to prevent damage to the spring. Use a flat-bladed tool, such as a gasket scraper to properly distribute the grease. Lower the vehicle to the ground and test drive to verify the repair. Please inform the customer that this will offer relief, it is by no means a lifetime repair. Periodic cleanings and grease re-application may be necessary throughout the life of the vehicle.

Of any value? Vibration Diagnosis http://sandyblogs.com/techlink/?p=3667

I'd at least talk to the dealer's service dept and make certain the required materials are ordered and confirm that the stuff is in before you schedule an appt. See earlier post on this subject (and even the other posts on the same issue) for part numbers required. Maybe even print the repair steps from the posts to give to the service writer.

Report Receipt Date: JUL 23, 2014 NHTSA Campaign Number: 14V446000 SUMMARY:General Motors LLC (GM) is recalling certain model year 2013-2014 Buick Encore and Cadillac ATS; 2014 Cadillac CTS, ELR, Chevrolet Caprice and SS vehicles; and 2014-2015 Chevrolet Silverado and GMC Sierra Trucks. Due to an incomplete weld on the seat hook bracket assembly, the front seats in the affected vehicles may not stay secured in place during a high load condition such as a crash. CONSEQUENCE:A seat that does not stay secured increases the risk of occupant injury in a vehicle crash. REMEDY:GM will notify owners, and dealers will inspect the seat hook bracket assembly weld and replace the lower seat track, as necessary, free of charge. The recall is expected to begin in late August 2014. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-458-8006 (Cadillac), 1-800-222-1020 (Chevrolet), and 1-800-462-8782 (GMC). GM's number for this recall is 14340.

I have a Silverado LT double cab with a very harsh ride (IMO) - especially speed bumps like in store parking lots - a very hard bump at 5mph over the speed bumps - also harsh simply driving over RR tracks, bumps in the road, etc. Don't know what shocks I have but this is what is printed on the black barrel of the rear shocks: AA 7A, OE18430/22891328. I've lowered the tire pressure from 35# all around to 33# all around w/o any ride difference. What shocks do I have, and what would I want for a smother (less harsh) ride for city 75% and hwy 25%? So I have: B-SABSORBER Make : Chevrolet Part#: 22891328 But still, no idea of the 'brand/manufacture ---------- Silverado-Hareek comes thru - they must be Tenneco shocks.

2014 Chevrolet Silverado 1500 Suspension Service Bulletin 367957NHTSA: Action Number: 10054631 Service Bulletin Number: 367957 Report Date: Dec 01, 2013 Component: Suspension Summary: Chevrolet/gmc: see document search button for owner letter. The rear axle pinion nut is improperly fasten and can cause gear to make clicking, grinding, moaning or whining noises and should be refasten. Model 2014 siverado 1500, sierra Any help ???

About 12 years ago I picked up from the dealer a new Silverado for my neighbor and in driving it to his house I noticed a vibration at about 60mph. I told him about the vibration and after tire swaps, balancing, etc, etc he had Chevy buy back his truck under the Florida Lemon Law. Even back then some Silverados were called 'Shakearados'. His new truck after the buyback did not vibrate. Maybe the U.S.Gov will have GM spend more effort to find the cause (and fix) for this long term issue: http://www.thedailybeast.com/articles/2014/05/17/g-m-becomes-government-motors-again.html

My 2014 Silverado Double Cab has the FM radio situation where the station will play fine while driving and then suddenly begin to drop out and sometimes come back in and then drop out again and stay out until I stop and start the truck. When I tune to a HD station it will turn ON and OFF as I drive and that seems independent of losing the FM station completely. I have a note to bring this up with the dealer service dept.