The 2015 Silverado continues the EcoTec3 5.3L L83 and 6.2L L86 with AFM, plus the new 8L90 8-speed automatic in higher trims. The 8L90 has a well-documented torque-converter shudder addressed by GM in TSB 18-NA-355. Combined with AFM lifter problems, the 2015 is a tough recommendation without preventive work.
Continued AFM lifter risk plus new 8L90 transmission shudder. GM TSB calls for fluid change to Mobil 1 LV ATF HP. Class actions on both AFM and 8L90 transmission.
Same AFM lifter pattern as 2014. Class action ongoing. Preventive delete recommended.
View P0300 Diagnosis →Torque converter shudder, especially at low speeds. GM TSB 18-NA-355 prescribes fluid swap to Mobil 1 LV ATF HP. Severe cases need rebuild.
View P0700 Diagnosis →AFM-equipped engines burn oil. Monitor monthly.
Run free diagnosis →Screen failures common; backup camera affected.
Run free diagnosis →Steel lines corrode through. Inspect carefully.
Run free diagnosis →Hydraulic pump weep and noise.
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Avoid unless prepared to address AFM and 8L90 shudder. The 2015 carries both major issues. A preventive AFM delete plus 8L90 fluid swap is essential maintenance. Without those, repair bills can exceed $5,000.
No - one of the worst years for the 4th-gen 5.3L. Both AFM lifter problems and the new 8L90 shudder are baked in. If you must own a 4th-gen, plan for proactive maintenance.
Expect $800-1300/year in routine maintenance. Plan for AFM delete ($1500-3000), 8L90 fluid TSB ($300-500), and likely brake line work in rust states. Lifetime non-routine cost: $6,000-12,000 to 200K miles.
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If your 2015 Silverado is throwing a check engine light, these are the codes most often associated with the problems above. Click any code for full diagnosis steps and typical repair costs.
No, not without preventive work. AFM lifter and 8L90 shudder are both well-documented. Plan for AFM delete and 8L90 fluid TSB before buying.
A torque-converter shudder felt at low speeds, often described as a wobble or vibration. GM TSB 18-NA-355 prescribes a fluid change to Mobil 1 LV ATF HP.
The most reliable approach is to disable AFM with a tune and replace lifters with non-AFM lifters. This is a $1500-3000 job that often pays for itself.
Highly variable. Without AFM intervention, lifter failure can come as early as 60K. With AFM delete and 8L90 fluid service, 200K+ is realistic.
They share the AFM problem. The 2015 adds the 8L90 shudder. The 2014 with the older 6L80 6-speed avoids 8L90 issues but still has AFM.