Does anyone have a solution to the bad lifter problems
New Lifters .
6 Likes
More frequent oil changes.
Many owners should be following the severe service oil change intervals, yet go too long (time or mileage) between changes.
3 Likes
How do you access the “severe service” schedule in the vehicle’s maintenance computer? Seems like that should be up to the computer.
ENGINE MISFIRE/TICK NOISE, MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED, DTC P0300 SET TECHNICAL SERVICE BULLETIN
Reference Number(s): 15-06-01-002E, Date of Issue: Oct 13, 2016
Affected Model(s): 2015-2017 Cadillac Escalade 2016-2017 Cadillac CTS-V 2014 Chevrolet Silverado 1500 2014-2017 Chevrolet Corvette 2015-2017 Chevrolet Silverado, Suburban, Tahoe 2016-2017 Chevrolet Camaro 2014 GMC Sierra 1500 2015-2017 GMC Sierra, Yukon, Yukon XL Equipped with 5.3L Engine (RPO L83) or 6.2L Engine (RPO L86, LT1, LT4, LV3) Attention: This Bulletin also applies to any of the above models that may be Export from North America vehicles. Supercedes: This Bulletin has been revised to add the 2017 Model Year and replaces PIP5316. Please discard Corporate Bulletin Number 15-06-01-002D and PIP5316.
CONDITION
Some customers may comment on a malfunction indicator lamp (MIL) on and/or an engine misfire/tick noise.
Technicians may find DTC P0300 set or in history.
CAUSE
This may be the result of an active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time.
This may be the result of internal locking pin damage in the lifter, due to oil aeration.
This may be the result of a lifter that has collapsed and is stuck in the lifter bore.
CORRECTION
NOTE:
Inspect the camshaft for damage while the lifters are removed from the engine. If damage is found, replace the camshaft per SI.
If SI diagnosis does not isolate the cause of this concern, technicians should inspect for valve operation.
If the valve(s) are not moving, replace the valve lifter oil manifold and affected bank of AFM lifters. Refer to Valve Lifter Oil Manifold Replacement and Valve Lifter Replacement in SI.
If the lifter has spun the bore, the guides should also be replaced.
RECOMMENDATION/INSTRUCTIONS
There are two approved processes for removing the lifter when stuck in the bore.
Use vice grips with a slide hammer.
NOTE:
Be sure not to pry on the sealing surface of the block.
Use vice grips with a small pry bar.
Typically one of the above approved processes will remove the lifter that is stuck in the bore. If not, the engine will need to be replaced.
With the lifter removed, be sure to inspect the bore for any damage. Typically the lifter bores will look good with no indication of damage.
PARTS INFORMATION
Part Number Description 12660737 MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (L83, L86, or LT1) 12660736 MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (LT4) 12623104 GASKET-VLV LFTR OIL UPR MANIF 12645725 LIFTER ASM-VLV (AFM) (4 per Bank) 12659260 GASKET-CYL HD (6.2L) 12622325 GASKET-CYL HD (5.3L) 11546959 RIGHT SIDE CYLINDER HEAD BOLTS (10) 11611976 LEFT SIDE CYLINDER HEAD BOLT (1) 11546959 LEFT SIDE CYLINDER HEAD BOLTS (9) 12657093 GASKET-EXH MANIF 12626354 GASKET-INT MANIF (8) 12619787 GASKET-VLV RKR ARM CVR 12623308 GASKET-F/PMP BRKT 12618336 PIPE ASM-FUEL FEED INTER 12618337 PIPE ASM-FUEL FEED INTER 12618338 PIPE ASM-FUEL FEED 12668553 SEAL KIT-F/INJR (O RING) (2)
WARRANTY INFORMATION
For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
Labor Operation Description Labor Time 4080978* Valve Lifter Oil Manifold and Valve Lifter Left Side Replacement 9.4 hrs (Silverado, Sierra) 14.8 hrs (CTS-V) 9.2 hrs (Escalade, Suburban, Tahoe, Yukon) 11.7 hrs (Corvette) 7.0 hrs (Camaro) 4080988* Valve Lifter Oil Manifold and Valve Lifter Right Side Replacement 10.9 hrs (Silverado, Sierra) 15.5 hrs (CTS-V) 9.3 hrs (Escalade, Suburban, Tahoe, Yukon) 11.4 hrs (Corvette) 9.0 hrs (Camaro) *This is a unique Labor Operation for Bulletin use only.
If there is no mention of severe service in the owners manual then change oil early. I change mine at 20% or every six months.
GM does have lifter problems, but I wonder if part of it is due to extended oil change intervals, in spite of what the OLM indicates.
1 Like
If you want to solve the issue permanently, you can replace the lifters with non AFM lifters, remove any other AFM hardware, and have the computer custom tuned and the AFM feature turned off in the computer. I wouldn’t do this unless I was in there replacing lifters anyway. But, I don’t think I’d install the factory parts if I had an early failure and intended to keep the truck. Several aftermarket companies offer complete kits.
1 Like