As I understand it, GM is programming the ABS pump to step in when vacuum is below spec (when mechanical belt driven pump cant supply enough vacuum)
Check local Craigslist for GM 1500 takeoffs. 1988 - 2020 wheels will fit. 17” is minimum wheel size (same as your spare) midsize Colorado and canyon wheels will not fit as GM changed the bolt pattern when they brought back the midsize trucks. I’m keeping an eye out for some 2019 - 2020 18” AT4 takeoffs.
They should be able to tell you what the lift is for each setting. If you have someone turn your wheel lock to rock and look at your current tightest clearance with your 2.5” level, you can estimate your minimum lift you need to clear wheel/tire combo. i have 285/70/17 on a stock GMT900 wheel (about 1” narrower wheel tha stock K2xx wheels) tire comes out to 32.8”. They didn’t rub stock but were close to inner wheel well at full lock and reverse. With the 1.85” lift from 5100s, not even close to rubbing now.
Looks like enough people complained to NHTSA about their sudden rock hard brake pedal and GM was forced to issue recall. I can set the service brake assist off just by pumping brake pedal a few times idling at a stoplight. My 2018 has the revised pump. Aka 2 piece pump (black cover on back) vs the early 1 piece cast pump.
How much lift? Pic of truck with lift? Ideally, CV shafts should be as close to level as possible. Yours are not ideal but not horrible either. Maybe email cognito and ask them about the angles?
Oh, a special time. New tires. Michelin Defender LTX is an excellent highway tire that will outlast nearly every other M+S tire for treadwear. They don’t have and aggressive looking sidewall but are all season. General grabber AT, Falcon Wildpeak, Cooper AT
I installed 5100s 3rd notch from bottom or 2nd notch from top for 1.85” of lift. I still have 1.5” of rake which I like for hooking up trailer, then truck is near level with 500lbs tongue weight. Lowest ring on 5100 was stock height. Email or call bilstein, they actually respond to inquiries with meaningful answers unlike most companies today.
Crazy this is happening on low mileage trucks. Guessing this ain’t powertrain coverage so if it’s going to happen, hopefully it’s during 3yr 36k. Now I need to take a look at mine. 9k miles on my 2018, purchased March 2018.
Both swaybar links are missing? Previous owner wanted more front articulation? I would get some new links to get things back in spec! How is the new to you truck treating you? What do you dislike and like? Cheers!
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