Brian-Spokane

Certainly not trying to shoot any messengers, at least on this issue. Not sure what you mean?

I had the commander. GM has detuned our trucks using many methods (see my original post). The commander addresses only one issue. I found myself still frustrated with the driveability of the vehicle. So, I decided on getting a performance upgrade from Lew. I am very thankful for his knowledge and ability to make my truck operate like it should. No regrets here. Well worth the money!

NewDude it's really very simple. Push on the gas, vehicle goes. Release the gas, the vehicle slows down. No exceptions. What will the libs do next? Implement a system where we have to answer "Are your sure" on the infotainment system every time we push on the gas?

After going through a Lemon Law case, and loosing, because of hesitation in my 2018 GMC Z71 1500, I learned a lot about what's going on. The BOTTOM-LINE - GM is intentionally detuning our trucks. This is undisputable. During the deposition phase, GM acknowledge they are intentionally detuning the trucks in an attempt to save approximately 1-2 mpg. What was I experiencing: Hesitation when in Active Fuel Management mode. Hesitation when lightly pushing on the gas When pressing on the accelerator peddle the power was delayed getting to the rear wheels When getting on the gas pedal immediately after braking, there is a HUGE delay When lightly pressing on the accelerator pedal, the RPMs actually go DOWN (WTF???) When going 30 mph the vehicle is already in 6th gear and lugging. This one detuning trick, turns your 350hp vehicle into a Subaru. Extremely slow transmission control to shift into a lower gear. Extremely fast transmission control to shift into a higher gear. So, after loosing, what did I do to fix these issues? I paid to have the truck re-tuned. I waited to almost 60,000 miles when the warranty expired. I am kicking myself for not doing it sooner. I am not affiliated with this guy at all, but I will tell you LEW at diablewtune.com fixed 95% of the issues and I can FINALLY enjoy the drivability of the vehicle, as I would have designed it. It actually pulls hard from a dead stop. I can actually smoke the tires if I wanted. YES, performance over economy in every situation ... finally! So for all you potential buyers out there, don't waste your time. Drive it off the lot and don't hesitate like the truck hesitates and give your vehicle a performance tune immediately.

My 2018 Sierra 1500 5.3L 6-speed does this ... big time. After 1500 miles i figured out how to eliminate the issue. Put the xmission in "L" then shift with the '+' and '-' buttons on the shifter until it is in L4Transmission shifts properly at low rpm/speeds. Keeping it 4th gear prevents it from shifting into 6th (lugging gear), this mode doesn't go into V4 mode. and the torque converter kicks in/out as expected.