2015 Silverado cylinder 7 misfire

[johnnyquick]

On 10/23/2025 at 2:10 PM, Cleanchvy70 said:

Ok just left the shop and the lifter is stuck but don't know if it turned and did any damages to the cam shaft. Basically he can remove the lifter to see if it's cut up and if it's any damages to the cam. If it didn't turn he would replace lifter and I'll be on my way but if it turned and did damage he think it would be cheaper replacing the engine. My question is have you guys heard of a lifter turning? Before you guys go all in on me I hardly know anything about engines. I'm just looking for a little help. Thx

I would be very surprised if the engine needed replaced, I would think that the camshaft and lifters as well as possibly check the heads and do a complete delete including bottom side of intake with the PCM being sent in for a quick reprogram and drive.

Bottom end should still be GTG.

[Gangly]

Yes, the lifters can turn in the trays and cause damage. 

 

If you are going to replace one lifter, you might as well replace all of the lifters and trays since 95% of the work is already done.  If one lifter has already failed due to mileage, type of usage, maintenance intervals, or whatever, I would assume the others aren't too far behind since they have experienced the same usage and wear. 

 

I think its something like 10 head bolts to remove the head if you've already removed the other side.  And don't forget to replace your high pressure fuel lines while your at it.

[Gangly]

On 10/25/2025 at 11:05 PM, johnnyquick said:

I would be very surprised if the engine needed replaced, I would think that the camshaft and lifters as well as possibly check the heads and do a complete delete including bottom side of intake with the PCM being sent in for a quick reprogram and drive.

Bottom end should still be GTG.

The engine most likely doesn't need to be replaced, but he is correct that it still might be cheaper to replace the engine.  If I remember correctly, the dealer wanted 11K-12K to swap out my lifters and cam.  My engine didn't need the lifters or cam replaced, I just wanted to swap the lifters because of the truck's mileage and to avoid any potential reliability concerns in the future. I went ahead and purchased the lifters, trays, pushrods, etc. and did it myself over the weekend for a little over $2,000 in parts, replacing everything with OEM parts, bolts, gaskets, etc. You could probably save a bunch using aftermarket components, but I stuck with OEM and have put an additional 40K miles on it since then.

 

Out of curiosity, I asked the dealer what a brand new engine would cost and it was around 7K if I remember correctly.  But that was just for the engine, no labor.  If you are willing to do the work, or have a good mechanic that is cheaper than the dealer, a new engine might definitely be cheaper than the cost of having the dealer tear into the old engine to replace the cam and lifters.

 

With my truck sitting at 160K miles right now, I know that if I ever do have lifter issues, I'd probably just buy a new engine and install it myself since my miles are getting high.

Edited October 27, 2025 by Gangly

[johnnyquick]

On 10/27/2025 at 7:46 AM, Gangly said:

The engine most likely doesn't need to be replaced, but he is correct that it still might be cheaper to replace the engine.  If I remember correctly, the dealer wanted 11K-12K to swap out my lifters and cam.  My engine didn't need the lifters or cam replaced, I just wanted to swap the lifters because of the truck's mileage and to avoid any potential reliability concerns in the future. I went ahead and purchased the lifters, trays, pushrods, etc. and did it myself over the weekend for a little over $2,000 in parts, replacing everything with OEM parts, bolts, gaskets, etc. You could probably save a bunch using aftermarket components, but I stuck with OEM and have put an additional 40K miles on it since then.

 

Out of curiosity, I asked the dealer what a brand new engine would cost and it was around 7K if I remember correctly.  But that was just for the engine, no labor.  If you are willing to do the work, or have a good mechanic that is cheaper than the dealer, a new engine might definitely be cheaper than the cost of having the dealer tear into the old engine to replace the cam and lifters.

 

With my truck sitting at 160K miles right now, I know that if I ever do have lifter issues, I'd probably just buy a new engine and install it myself since my miles are getting high.

Absolute Piracy for a dealer to charge that kind of $$ for a cam, lifters and tune.

Like you said you did it on a weekend in your driveway essentially..lol

 dealers are crooked as hell IMO

Edited October 29, 2025 by johnnyquick
TMI..😂

[davester]

Most likely the dealer's number was for replacing the cam/lifters with the afm/dod setup, rather than with non-afm parts.

[Gangly]

17 hours ago, davester said:

Most likely the dealer's number was for replacing the cam/lifters with the afm/dod setup, rather than with non-afm parts.

Nope.  I wanted everything to be  factory/OEM and that was the price quoted. 

 

I walked from the service department to the parts department and purchased most of the parts I needed right then.  They didnt have all of the parts, so I drove to another dealership for the remaining components.