mayutt

What about burning Ethanol in your L86? Can you burn E85 in your L86 now, since it already had the ethanol sensor? I'm assuming your truck was factory FlexFuel with the L83.

Soooo, I drove the truck about 500 miles this week, no time to change the sensor. About 450 miles into the drive oil pressure went back to normal... and no more P06DA/DD codes. Looks like the solenoid is working again. Seems obvious now, but I put oil conditioner in the oil the last couple oil changes (seemed like a good idea for a >200K mile engine). I changed the oil with straight 0W-20 synthetic when the P06DD/DA started... Now I'm thinking the oil conditioner gummed up the solenoid and it took 450 miles to wash the conditioner out of the solenoid with fresh oil. Anyway, I'll not be using any additives from now on. Super happy it looks like I have more miles left in this engine.

I drive a 2014 Sierra 1500 SLT with an L83. It has over 220K and still runs great, but I'm starting to research an engine swap as I intend to re-engine and keep driving it when this one goes. I see the L86 is a direct form/fit/function minus some tuning...my question is regarding the Flex Fuel sensor. Since my truck is factory Flex Fuel, will it be fine to run the L86 on ethanol too (if I install a rebuilt L86 vice L83)?

Will do, thx. I'll update after the O2 sensor shotgun. My expectations are low...

Bump... My 2014 Sierra 5.3L is popping P06DA and PO6DD consistently. Started one morning a couple weeks ago all of a sudden. Oil pressure runs about 20 psi higher than it used to. From reading in these forums, youtube, etc, seems like the likely culprit is the oil pressure solenoid. My truck has over 221K miles, so the labor to replace the solenoid seems to make it logical to replace the engine when it's time to do something. However, in the meantime, is there really any problem with the oil pressure running a little high? I think I'm going to just keep driving it as is until something worse develops. Power is normal, runs as well as it ever has. I've replaced the oil pressure sensor and that made no difference... I'm also going to replace the bank 1 upstream O2 sensor... one guy fixed his by doing that... apparently that O2 sensor is on the same circuit as the oil pressure solenoid. Fixed his. Thoughts?

Thanks! I've owned GM trucks for years, first time doing custom wheels. I got motivated to do it when the factory 20s got scratched up when I got stuck doing normal truck stuff. I'm much happier with the 17 inchers. It's just my experience, and people use their trucks differently, but for me the fact that the factory SLT 20" wheels are flush with the tire sidewalls makes it too easy to damage them. Each to his/her own! This forum was my main source of information on wheels/tires/offsets/rubbing/leveling kits when figuring out what I wanted. Worked out great for me. Appreciate everyone's information and willingness to help. Good stuff!

285 70 r17 BFG KO2s on Mickey Thompson 17x9 Classic Black (-12 offset). Rough Country 2" leveling kit. No rubbing anywhere. Ride is excellent and nearly as quiet as OEM tires/wheels. Very happy with this setup.

I think that looks sharp! I'm going to try the Mickey Thompson Classic III in black (my truck is Iridium), 17x9 with probably 285 70 R17 and a 2" RC level. That's also a -12 offset wheel; your setup gives me confidence it will come out looking good and working fine! Did you try the Bilsteins?

Nice looking truck! I'd like to use some 17" Mickey Thompson wheels and maybe the same tires you're using. What lift/level are you using? What's the offset of those wheels? Any rubbing? Thanks!

Do you think the 2" leveling is necessary, or could one get by with less or no leveling?