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Hey all. So, my father's 2017 Silverado (base level cluster) shows if the truck is in 8 cyl or 4 cyl AFM mode in the DIC. However, I cannot seem to find any way to tell what AFM mode I am in on my 2020 Sierra 1500 with the base level cluster/DIC. Does anyone have any clue how you can tell what mode the truck is running in? The main reason I'm asking is because I want to get one of the Range AFM disablers, and I'd like to see, live, if it ever switches in to 4 cyl mode.
Thanks in advance for any help you can provide
2007 Silverado 5.3 V8 with AFM with 180,000 miles
Truck had lifter ticking sound and white smoke upon every start up which would go away after a few minutes, no check engine light
Replacement list :
- valve gaskets
- upgraded drivers side valve cover
- valve stem seals
- intake manifold gasket
- exhaust manifold gasket
- 8 new afm lifters
- 8 new non-afm lifters
- head gasket bolts
- engine coolant temperature sensor
- spark plugs
- spark plug wires
- fuel injectors
- water pump
- cam sensor
- crank sensor
After completion of engine reassembly no longer had white smoke upon start up and no ticking sound but flashing check engine light code p0300.
Code p0300 was for cylinder #1, #4, & #7
Moved coil packs between cylinder #1 and #2 to see if coil packs was bad but no change. Set engine at TDC before installing the rocker arms.
All bolts have been properly torque and no parts have been left unplugged or uninstall.
Any possible advice would be helpful
2012 Silverado 4X4 Ext Cab LC9 with 101k miles.
As the title states, I have a unique situation. The cab and bed are entirely off of my truck (T-bone damage), thus I thought this would be a good time to do a DOD delete as well as any other recommended upgrades or repairs WHILE THE CAB AND BED ARE OFF! I haven't looked at too many kits yet (Scoggin Dickeys, Texas Speed, WS6Store, etc) and still figuring what I need/don't need. Definitely would like to put in a mild performance cam if it isn't too much extra.
I'm new to these trucks, so I don't know all the weak spots other than the DOD system. Basically, I'm interested in bulletproofing the system much like 6.0 powerstroke owners had to do.
I just heard about the oil pickup o-ring. WTH! Wow GM.... Worth it to do this at the same time as the DOD probably. Something about a AFM plate in the oil pan? But I'm open to your input. What else? something about timing chain guides??? I vaguely remember something about a fuel system issue being pretty common as well?
Sorry if I am all over the place. SO many questions right now. I just got the cab off yesterday and pretty much planning on ordering what I need by the end of this week
Be doing all the work myself
On Sunday March 8th I was driving my Sierra home from my parents-in law. I pulled out from a stop sign and was just getting up to speed when there was a loud bang followed by loss of power, Loud ticking noise, vibrations and a sulfur smell coming from the exhaust. I knew this was lifters instantly as it Happened to me in August of 2018, a short 11,000 miles ago. So, I took it in to my dealer who ran diagnostics and gave me the news That I would need lifters replaced yet again. Unfortunately, my power train warranty ran out December of 2019, so they told me I would owe a balance of $2900+ tax. Of course I was very upset with this news as I would have imagined the dealer would talk to GM and get this issue sorted out.. I mean it was only a few months over a year and less than 11,000 miles since they replacedall of the lifters and the cam shaft. I contacted GM myself and over the course of the last week have been working with the dealer and trying to talk to someone at GM who could help. Finally I reached a “senior analyst” who is apparently the top tier of customer assistance and she told me there was absolutely nothing they can do and I am responsible for the entire bill. I insisted that GM must know about the issues this engine has By now and should acknowledge and help their clients, but she offered no help.
How can I trust this engine again? I have read many posts people have put on this forum alone with this issue of failing lifters. How can anyone be expected to pay this much for an issue that is derived likely from GMs design of the afm system? Especially after we pay $50,000+ for the truck to begin with! I do not pretend to be an Mechanical or financial expert, but I feel I have been severely wronged in this situation. I have no choice but to eat this cost and sell the truck before the lifters have a chance to fail again.
I would suggest anyone doing research considering buying one of these trucks (I believe Sierra and Silverado 14-18 at least) that has the active fuel management system to rethink it. I would also go out on a limb and suggest my friends with 14-15 year Silverado and Sierras (with expired powertrain warranty’s) to consider selling them before the lifters fail on yours and you are stuck with a $3000-$5000 bill. Good luck all.
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