KevanG

Hoping to find someone smarter than the service guys at the dealership ... 2023 Silverado 3500HD, 59,000kms (36,600 miles). Bone stock except for an AutoSync & rubber duckie ... we're towing 99.9 % of the time. Not heavy, max combined weight maybe 7000kgs. We operate a large animal emergency response service, so vehicle reliability is critical. Beginning March 17 the truck went into limp mode & threw the first P0747. Took it to the dealership, they had it for 3 days, couldn't find anything wrong. Since then the same thing has happened 11 times, back to the shop every time; they spend days (supposedly), with no results. They refuse to pull the transmission apart to do a physical inspection. So, it's official, the service department is beyond useless. Here's what i've noticed: it only happens when the TFT is over 70C (about 160F), & after the transmission shifts from 6th to 7th. Happens with or without tow mode. Even if the TFT rises above that threshold, i can keep it from having its hissy fit by staying in 6th. Below 70/160, it's fine in any gear, any mode. Any constructive ideas, thoughts or suggestions?

Can't help on the skid plate, but i've purchased several sets of bulbs from Auxito over the years, & every set has been amazing. I just put these in my 2023: https://www.auxito.com/collections/h11-led-bulb/products/h11-h8-h9-led-headlight-bulbs-120w-24000-lumens-per-set-700-brighter-6500k-cool-white Left side are the LED's, passenger side still had the stock halogens when i took the picture.

I bought mine through Auxito, been buying their LED's for a few years now & have yet to have a problem. I got 2 pairs of H11's from them last month, the Q16 model, & they are leagues beyond the stock halogens. ver the past 2 years i've put full sets of these bulbs into my 2017 Silverado, & my wife's '07 Sierra; same excellent results with both of those trucks. I had to adjust both assemblies down a bit to compensate for a bit of glare, but Auxito's bulbs are actually quite well made so there's very little deviation from the original light pattern; it's just 3 X's as bright! The shot was after i replaced both LH bulbs, just wanted to show the difference. Here's a link to the ones i got most recently: https://www.auxito.com/collections/h11-led-bulb/products/h11-h8-h9-led-headlight-bulbs-120w-24000-lumens-per-set-700-brighter-6500k-cool-white