2014 silverado Multiple issues/looking for help

[alkaspeltzar]

So I have a 2014 Silverado, 5.3, 3.42 gears, 6 speed, 70K

 

1. I have noticed when the truck is warm the idle will drop to 400-450rpm, make the truck stumble and correct. It only happens after a spirited run on the freeway or after pulling heavy, coming to stop at like a red light at an exit ramp. Taken to dealer several times and no solution. Tried fuel cleaner, MAF cleaner, cleaned throttle body, etc no resolve.

 

2. bubbles or gurgling coming from heater core. Dealer say there is not air, did vaccum on cooling system twice. Yet, when the truck comes to a stop and it is quite, there is a clear water/gurgling sound on the passenger side. Heater core air trapped? how to get it out?

 

3. water pump squeal and squeak. Been replaced once already, no doing it again. Do the water pumps just suck this bad?

 

4. Truck aging and noticing rougher shifts when a first drive until up to operation. Loosing the nice feel it had when new. this normal?

 

Help help. Dealers are not helping unless there is a bulletin

 

Thank you

[Justin101714]

Any aftermarket accessories installed on the vehicle? Has the battery died recently or any tune in any modules?

 

 

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[alkaspeltzar]

Original battery, no tuning, all stock

[njk4o5]

mine was having rougher shifts for a while. I brought it to the dealer last week and the trans is blown. 96k miles. pretty sure the shtty stock trans tuning did her in.

 

at least powertrain warranty is there

[alkaspeltzar]

Really? Stock tranny and tune and at 96K it dumped out? I lost my 2010 tranny at 66K and I was pissed. Seems now a days we are sacrificing longevity for fuel mileage.

 

Anyone have any ideas about idle?