Sierra0919

2014 Sierra SLT 4x4 with Max Tow. Purchased the truck new with under 25 miles now has 188,278 miles. A/C compressor failed in 2015 with 42,000 A/C condenser failed in 2016 with 86,000 110v inverter failed in 2016 with 90,000 Transmission due to Torque converter failed in 2017 with 132,000 Driver side motor mount failed in 2017 with 152,000 Rear pinon seal failed in 2017 with 152,000 Shocks all the way around (original shocks were shot) 2018 Battery and ground cable replaced at 163,00 in 2018 Overall I'm happy with the truck, I have never had a check engine light on. I would recommend the following. Trans Thermostat mod: Running from DFW to Odessa/ El Paso in the summer i would see trans temps of 215 deg. Once i moded I only get up to 185 deg 190 city. upgrade to 75w90 in rear end. when I did the pinon seal I noticed the spider gears are shot. I'll replace those next year but, I think the new fluid is to thin. Truck makes a loud clunk when going in gear, you can turn the drive shaft almost 180 deg due to the play in the gears. Ring and pinon tolerance checked ok. Trans tune, when they replaced the trans they updated the tune. Night and Day compared to the original programming Catch can, I drain about 4oz of fluid after every 2k miles. Running in the south, I should have been running 0w30. I'm currently hearing a little bit of piston slap. The thicker oil helps but I'm guessing at 200k I'll be replacing the engine. So I was looking to see if anyone else has a piston slap issue at high mileage, I know the di system is loud but I just started noticing the slap at around 180k. very loud using 0w20, once I switched to 0w30 i can only really hear it when I'm up against a wall, like a drive thru.