pickupman87

Coincidence? Today I had a co-worked try his OBDII thing on it and it had a pending code P0304. By the time we got done with our trip the check engine light was on and it said confirmed P0304 - Cyl 4 misfire. Separate issue? Related? The stabilitrac/trac control warning has been there for months and funny when I just start looking into it more, this shows up.

Good morning, apologies if this is posted in the wrong spot but I'm guessing its applicable, truck or sub. I've got a 2012 Suburban and I occasionally get the Service Stabilitrak and Traction Control Off lights on. No check engine light and no codes (that my cheap reader can see). As crazy as this sounds, it appears to be related to the cabin temperature. For example, the first time it happened it was July (in MN), truck was sitting in a hot parking lot, start it up and the lights are on. As I drive it and the AC is cooling the cabin temp, they turn off. This would happen every time it sat in a baking hot parking lot until the AC cooled it down. Flip to the winter now, no lights until I'm driving it for some amount of time with the heat on, once it gets warm enough in the cab - they turn on. Let the truck sit/cabin temp cool - they'll be turned off. The only thing I could think of was the brake switch as it seems to be triggered when I hit the brake. I replaced this last week and still have the same issue. Any thoughts? Pete

Cold idle is around 50-55, warm idle is 38-40, driving is around 45-50

Interesting. I had basically the exact same thing happen, same code, etc. Noise started when it was -20 or colder and I chalked it up to the cold. Only difference is mine eventually grenaded. I do wonder the same thing. I've got 300 miles on the truck since I got the oil pump replaced (was done at a local shop). They said everything looked clean and they didn't find any shavings etc. They do want me to change the oil again in 1500 miles though. Unfortunately mine wasn't under warranty and cost me a little over $2500. Truck seems find now however I do question the longevity of these things. For a 2014 pickup, I've stuck way too much $ into it. Here's the thread on my issue -

Does anyone know the cost to replace an oil pump on one of these motors? Out of warranty?

Part 13-1401A will work. 2.5" leaf spring.

Out of curiosity, has changing tires fixed many peoples vibration issues? My 14 vibrates some however it is inconsistent and frustrating. Dealer did RFB etc etc and said it's good, however it's no better than when I dropped it off. One thing I have noticed is that the vibration is very sensitive on the air pressure in my tires (still stock Goodyears). I can change at what speed the vibration happens or how strong it is based on PSI. I wonder if some of the inconsistency has to do with the pressure in my tires fluctuating as well. Truck sits in a heated garage all night at 50 degree and one kind of shake driving to work, however sitting in a parking lot at work where the outside temp has been dancing around 0 vibrates different on the way home. Just for fun I might swap wheels/tires with my brothers 08 Silverado this weekend and see how it vibrates.