crhoades68

Here is the follow up to my original post which was basically that I was hearing a constant noise from the rear end while the truck was in motion. I decided to take it to a dealership. Following is the technician's note. "Test drove with chassis ears, rear differential noisy. Disassembled rear differential. Lots of metal on magnet, multiple bearings worn. Replaced multiple bearings, pinion, carrier bearing, and set up backlash and all bearings preload, cleared metal from housing. Test drove vehicle." According to the service rep, this would have been around $2,800 but was covered under warranty. Below is the list of parts replaced. Qty FP Number Description 2 9436881 Bearing Y 5.855 1 9414917 Bearing Y 5.447 1 23243839 Bearing Y 5.526 2 20920620 Gasket Y 5.811 1 26064030 Seal Y 5.469 3 88900401 Lubricant N 8.800 1 26067159 Gasket Y 5.399 1 26008741 Spacer Y 5.476 No prices provided since it was a warranty repair but was told the parts would have been around $1,800. The repair took 7.2 hours.

I know this is a bit late but just purchased a used 2016 GMC 2500 Base Reg Cab. The fronts were at 58 but the rears were at 55/53 and I got the TPMS warnings for the rear tires. I increased the rears to 58 and no longer get the TPMS warnings. Also, I now receive the trailer connection messages.

I have an issue and have searched the troubleshooting section but haven't found a thread that really matched my issue. I recently purchased a 2016 GMC Sierra 2500HD 4x4 (Regular Cab w/ 8' bed) with 55k miles. When I test drove it all the area roads were either rough or under construction so it was hard to determine much via the test drive. The truck looks in great shape and had good service records including a clean Car Fax. Once I had driven on familiar roads I noticed a noise that I'm now trying to diagnose and fix. I'm not sure how to describe it but I only hear it when driving (at all speeds). I hear whether or not I'm towing. The noise doesn't get louder with speed and I don't hear it at idle. The dealer had installed new tires (General Grabber) on the existing base 18" wheels. The ride was rougher than I thought it should be and I knew the torsion bars had been cranked. I think it is back to or close to the original ride height and it improved the ride but I still hear the noise. I know that it's not wind related because other people can hear it but it's not so loud that everyone turns and looks at the truck as it passes. I've looked at everything I can think of but don't find an external source. Any thoughts or ideas would greatly be appreciated.