Martinthezman

Hello, it runs sluggish with fan off, ac off, fan on, ac on at times. I don't think the fan or hvac is the problem... I think what ever causes the fan to blow slow, is also causing to it to run sluggish...

Hello, I replaced the Battery and have V4 mode turned off. And it does the same thing.

Hello, I noticed sometimes the blower fan blows slower than usual. Like half speed when turned all the way up. Then suddenly it starts to blow like it should. When the fan blows right the truck runs like beast, when the blower is slow, the truck is sluggish. What would cause this? I had an Infinity SUV once, and it had a relay in the BCM that was weak, when I changed it, everything worked better and it ran a lot better. Could be the same deal?

Hello, I have a 2016 Silverado 4x4 with the 5.3. It is has the manual HVAC system. I've noticed that there are times this truck runs like a beast, and sometimes it seems weak. The Truck running strong at times and running weak at times has been going on for almost two years [the truck has 50K on it]. Often times on the same 100 mile trip I notice it switches between BEAST mode and weak mode. There are no codes. I changed plugs and wires. Even turned off the V4 mode to see if it would stop. Nope the same deal. Recently I noticed [probably been going on the whole time and I just noticed it] that my blower fan sometimes is blowing at about 1/2 power though I have it turned almost all the way up and then suddenly while driving it kicks up and blows hard like it should.. When this happens the Truck perks up and runs like a beast. It is like the FAN speed issue is connected to the sluggish issue. What would cause this? I had an Nissan Armada [lk] SUV once, and it had a relay in the BCM that was weak, it affected the power to most of the electronics on the car, and caused it to run weak. I noticed a big difference when I replaced the the relay in the BCM. Does the Silverado have an issue like this? Thanks for the input, Martin