Offset is the centerline of the rim in relation to the hub. A positive offset which is found on most factory wheels means that the centerline of the wheel sits on the inner side of the hub, 31mm for example. A 0 offset rim center is directly centered with the hub. A negative offset means that...
With 250K and everything running fine I bet your cat is going bad. The system is constantly running diagnostics and evaluating the perceived state of the catalyst, which is why the code can come off and on if the cat is still working but not 100%. The cat does not have to be clogged to be below...
5100’s would be my recommendation. I wouldn’t bother with control arms, really only helpful when you’re leveled beyond a reasonable amount 2.5” or more putting too much stress on the UCA to limit droop. Unnecessary with a reasonable level or 5100’s.
In older models going back to the 6 speed I believe, tow/haul or M5 disables the AFM on earlier models and it seems that M9 will disable DFM on 21+.
If the noise goes away when in L9 and not in D and the noise is most likely associated with the DFM system. This system shuts off cylinders at...
Suspension geometry will always pull in the suspension on any IFS vehicle when it’s at the bottom or top of the arc.
New tires, new asphalt, hard acceleration, sounds like you’re spinning a (rear) tire...
Lifter manifold oil assembly (LOMA) which controls the AFM. Makes sense seeing as you had AFM issues and misfiring. Probably just got lost in translation...
That code looks like it’s from having the plug backwards, can’t do that. No way they are working properly...
Cut/ modify the new part to fit the connector or get the correct part.
Take it to another dealer or shop, you need the vehicle to actually be fixed before you put that new set of tires on or else you’ll be right back in the same position.
If they aligned everything 750 miles ago it should be dead on, and with how those tires look I bet it’s not even close.
Rear...
I would give these a shot, I would be interested to see how they would work with the factory air ride.
Might be good enough you won’t have to go through the hassle of removing and adding aftermarket bags.
https://www.truckspring.com/products/Coil-Springs-CargoMaxx-GM-Rear__351-897HD.aspx
I had one from Rockauto and it was awful. Would not hold the clips centered, they would walk out and contact the rotor. Whatever coating they had on it the rust ate through in about a month. Bought OE and put the Cardone in the scrap bin where it belongs.
If this is the same dealer I’m wondering why these are itemized differently, and also why is an alignment also listed under the recommended service? Something isn’t adding up, I would pay the dealer a visit and clarify with the service writer/manager.
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