This is the UOA test kit that Napa sells for $15, first one I've had done. I plan to run this oil to 3500 miles and test again more to see how the oil is holding up then anything else, I don't trust the oil life monitor for these GDI engines. Customboss did I read somewhere on the Forum that you do UOA? If so I can send it to you when I change the oil again this Spring. I was a little disappointed the Napa (ALS)results only had Base and Viscosity results in regard to the oil. I was hoping they would show Fuel dilution like you mentioned above.
My guess is its a voltage/amperage feed problem because its only blue intermittently when in DLR mode and goes away completely when the headlights are on, and only on the drivers side, at least on my truck.
This is my first UAO on my 21 Sierra 6.2. Bought a couple of the Napa kits, analysis was done by ALS labs. Total miles on the truck 5890 with oil/filter changes at 700, 2800 and 3044 using Mobil 1 AFE 0w-20 and Purolator Pure 1 filter.
The Blackstone pumps are identical to the Amsoil unit, just different stickers. I found that the 1/4" tubing is too large for my 21 6.2 dip stick tube, called Blackstone about this and they sent some 1/8" tubing, works fine now.
My Sierras DLR lights match when I first start the truck then after a few minutes the driver side top turn a lite blue. I went and checked and mine behaves the same way with headlights on, clears up, off back to blue. Thanks for pointing this out.
My 3 month old 21 Sierra SLT has developed this problem on the drivers side but its intermittent, usually when I first start it its white like the other side then will change to a lite blue and pretty noticeable. Of course took it the dealer and it stayed white! Lol Has anyone else had theirs act this way? Will it eventually stay blue?
My Sierra SLT 6.2 /10 spd was built the week of 3/22 and a delivery date of 4/22. It now has a delivery date of 5/9. As far as I can tell its still bayed at the plant in Silao. My Dealer thinks its being held because of the chip issue and to check on it next week.
After more research and checking with a GMC parts dept. the 84487008 comes as spoiler only now. The 84515395 is the High Mount Lamp with Camera only, no spoiler. I need to double check to make sure its for the mirror and not the bed view, the description just states rear camera. This comes with no harness, so will need 84479945. To summarize the parts needed for the mod. Mirror 13536995 Coax 84335461 High Mount Lamp 84515395 Harness 84479945 Thanks for the for the help Hiyo!
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