Mar 25, 2023 · Looking into getting a 15 or newer GMC Sierra with a 5.3. I’ve heard that not all of them have AFM mode which is how I would prefer it. Wondering if this is true or if they all have …

Feb 16, 2025 · Hi there, This is my problem. My GMC truck came with two OEM key fobs. A couple weeks ago, the blade of one of them broke (came off the folding part). The OEM key …

Jun 3, 2017 · Hey, everyone. So just this morning I threw a Rod and either need to rebuild or replace the motor. After looking for a few hours I've discovered that plug and play compatibility …

Apr 1, 2012 · Does anyone know the RPO code for DOD or Displacement on Demand that i can check? Is there another way to check if my truck has this option? I own a 2010 GMC Sierra …

Aug 15, 2013 · Looking at installing a cam, stall, lifters, springs, and a DOD delete done and was wondering a reasonable install price?

Mar 23, 2012 · I poked around and didn't see this specifically asked anywhere. I have a brand new 2012 Silverado 1500 LTZ 5.3L .... I noticed my idling oil pressure drops to around 40 psi, …

Apr 26, 2016 · I was told a few days ago that the GT tuner from Bully dog has a feature on there to disable the active fuel management and makes the truck run on all 8's rather than switching …

Oct 12, 2022 · What cam did you get for the AFM/DOD delete? P219A/B is Fuel trim imbalance, and P0300 is Random miss. I’d say bad Tune on the truck. But my 08 Z71 LTZ crew cab was …

Aug 20, 2010 · I heard from my brother who is on a lot of GM forums that there is a recall on the lifters on GM vehicles 07 and later with active fuel management. It's...

Jun 6, 2020 · 2008 Silverado 5.3 V8 with AFM with 180,000 miles Current issue is flashing check engine light with code p0300, snap-on scan tool reading missfires on cylinders 1, 2, 4, and 7 …