topgear1224

Hey guys so I asked on Facebook and I didn't really get very far so I figured I'd bring it up here. 120,000 mi completely stock. Here's what's going on. so with the converter locked and I believe in 5th gear around 1500 RPM I randomly get what feels like a misfire when applying light throttle until the turbo spools up. I bought this truck from an auction all the glow plugs were bad replaced all those. The truck had some dead battery issues right before it went to auction so I looked at the stored codes but ended up clearing them because a lot of them were communication codes which would be related to a dead battery. All filter replaced, all fluids (except trans and xfer) replaced. I meant to write down the actual codes but one of them was for EGR and the other ones was for glow plugs. I've replaced the glow plugs everything is completely fine as far as that goes. the filter head does like to lose a little bit of prime overnight so if I just fire it up first thing in the morning it'll run a bit rough if I put about two pumps onto the primer it runs completely smooth after start. I have conflicting data from different scan tools some of them are showing the EGR experiencing large error % as far as deviation. My all tell is showing small amount of error (2% at idle) but not enough to trigger a code. Doesn't feel like 605 torque if I'm honest. Pretty sure my 8.1 could out pull it at this point. Here are the fuel numbers Attached is some OBD live data First few are some screen shots. The one with the date is the most recent. Here is a link to the EGR doing it thing last week while I drove around town. Big drive south (AK to AZ) supposed to start tomorrow night. But I don't want it to brake down in the middle of nowhere.

yes, premium will go up though.

Exactly what I was thinking Sent from my SM-N975U using Tapatalk

Wierd I wonder if it uses AI with the rear camera. you could try a complete wiring harness like the ones they sell at Walmart with the lights and everything and just throw them in the bed and see if that works. [emoji1745] Sent from my SM-N975U using Tapatalk

Any 7 pin simulator should work I would think. Sent from my SM-N975U using Tapatalk

You can add an aftermarket trailer brake controller but it's going to be inertia based, the factory one is integrated into the e-boost system. Sent from my SM-N975U using Tapatalk

Trailer brake, no Bed outlet MAYBE do you have the 110 in the dash? Sent from my SM-N975U using Tapatalk

REDACTED my eyes deceived me. Sent from my SM-N975U using Tapatalk

https://bds-suspension.com/instructions/021683.pdf Sent from my SM-N975U using Tapatalk

it really just depends on how hard you drive the truck if you're sitting there jumping it all the time you're probably going to snap them. if you just drive them on the road it'll probably never fail Sent from my SM-N975U using Tapatalk

It's leverage on the spring that's why GM says don't do it. Yes it will snap with hard enough use. Also because of how it's designed it's really only designed to flex sort of towards the ends and kind of give you a variable spring rate, whereas the steel one the whole thing can flex and as you flex more of it it's sort of variable.... it's kind of hard to explain. Anyways now you can get the conversion to steel springs from GM I think it's $600 and that includes both the springs and u-bolts. Just look at the 2021 accessories Sent from my SM-N975U using Tapatalk

2021 now has wireless connection Sent from my SM-N975U using Tapatalk

https://www.gm-trucks.com/forums/topic/240553-biggest-tire-upgrade-on-stock-rims-20%E2%80%99-sierra/ https://wheelsasap.com/gmc-at4-oversized-tire-trimming-guide/ "all on non-AT4 Sierras with a 2 inch front level (which is an AT4), you can fit that 295/60R20 without trimming as long as it's 33.94" v 11.77" or smaller." Sent from my SM-N975U using Tapatalk

They chopped it off, not a clean cut, would have to get a whole new cross member, and knuckles. Idk if it work it at 206k. Took it to GCWR from Arizona to Alaska and other than the squat she did amazing. Sent from my SM-N975U using Tapatalk

If you hop into a trail boss it's literally exactly the same parts. Sent from my SM-N975U using Tapatalk