2019 Silverado rear lift block and factory shims

[jfro]

I recently installed a 2" front level from Superlift on my 2019 Silverado LT 4x4 and I want to install 1.5" rear blocks to have some light rake for towing. My truck has NO factory blocks but it does have the small 2 degree shim with the fat end facing forward. I've read that some users are experiencing vibrations related to pinion angles when adding blocks to these trucks. I've also heard mixed answers from companies, Pro-comp says leave the factory shims in while Superlift says take them out. I'm planning on using flat 1.5" blocks and leaving the shim to start. Does anyone have personal experience with this that can verify what setup produces no vibrations (shim or no shim)?

[Silverado4x4]

16 minutes ago, jfro said:

I recently installed a 2" front level from Superlift on my 2019 Silverado LT 4x4 and I want to install 1.5" rear blocks to have some light rake for towing. My truck has NO factory blocks but it does have the small 2 degree shim with the fat end facing forward. I've read that some users are experiencing vibrations related to pinion angles when adding blocks to these trucks. I've also heard mixed answers from companies, Pro-comp says leave the factory shims in while Superlift says take them out. I'm planning on using flat 1.5" blocks and leaving the shim to start. Does anyone have personal experience with this that can verify what setup produces no vibrations (shim or no shim)?

I kinda wondered the same thing about the factory shims looking like there installed backwards. I installed many lift kits in my time and the fat end always went to the rear.

I have the very slight vibration also at about 60-70 mph but can out run it at speeds above 75 so that points to the tires if it was driveline related it would get worse at higher speeds.

[jfro]

3 minutes ago, Silverado4x4 said:

I kinda wondered the same thing about the factory shims looking like there installed backwards. I installed many lift kits in my time and the fat end always went to the rear.

I have the very slight vibration also at about 60-70 mph but can out run it at speeds above 75 so that points to the tires if it was driveline related it would get worse at higher speeds.

I was under the same impression, fat end to the rear. However, I read a post where he flipped the shims around (fat end in rear) and the vibs got worse. Do you have aftermarket blocks in the rear or is it stock with the shim only? 

[Silverado4x4]

2 minutes ago, jfro said:

I was under the same impression, fat end to the rear. However, I read a post where he flipped the shims around (fat end in rear) and the vibs got worse. Do you have aftermarket blocks in the rear or is it stock with the shim only? 

Stock with shim only.

[jfro]

That's how mine is and I haven't noticed any vibs.