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We have a 2016 Yukon 6.2L which developed a rattle at approximately 60k miles. Initially I believed the source of the rattle was a heat shield, but everything seems to be tight. It has been to the dealer twice and no progress has been made to resolve the issue. The first time they dismissed the problem and called it "normal" and the second time they believe it's a broken baffle weld in the muffler. What do you think? Thanks in advance
Video with several angles from under the vehicle demonstrating the issue. The problem only surfaces when the vehicle inters v4 mode. Also, the rattle is so loud it is picked up by the Knock Sensors and it pulling timing. Scan performed with HP Tuners VCM Scanner.
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
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