DTC P2635 fuel pump circuit "A" low performance/pressure

[Maximum velocity]

My 2017 Silverado 5.3 with displacement on demand is throwing the p2635 code for the fuel pump circuit. I haven't noticed it driving any different than it always has but I will mention that I get a cylinder misfire on number 7 on slight acceleration on inclines. I read about replacing the stock spark plugs wires with lower ohm wires but I haven't gotten to that just yet but after I cleared that code and just accelerate a little harder when I need to I haven't gotten it back but now it throws the 2635 code after I have cleared it a few times now. I found a thread in here that were the exact symptoms but it went dead with no resolution response. So I'm looking for a little guidance where to start since if it's the fuel pump drive module I'll have to take it to the dealership to get it programmed or if it's the fuel pump it just gets pricey any input is appreciated. 

[Scooter93]

I just had this code pop on my 2018 GMC Sierra 1500. I’m out of the 3 yr/36,000mi warranty but upon investigation I believe a vast majority of the fuel system components are covered on the emissions warranty which lasts 7-8 years I believe. I’m contacting the dealer tomorrow when they are open to confirm. I’ll try to post an update if I find a resolution. 

[sam302psu]

On 7/26/2021 at 7:25 PM, Scooter93 said:

I just had this code pop on my 2018 GMC Sierra 1500. I’m out of the 3 yr/36,000mi warranty but upon investigation I believe a vast majority of the fuel system components are covered on the emissions warranty which lasts 7-8 years I believe. I’m contacting the dealer tomorrow when they are open to confirm. I’ll try to post an update if I find a resolution. 

Did you ever confirm that the fuel system components are covered by the emissions warranty?  I have the same code and want to take it in if it's covered.  If not I'll replace the pump myself I guess.