GM has officially released bulletin #26-NA-168 acknowledging that some 2023 LZ0 3.0L Duramax trucks may trigger a P2002 code immediately after an OTA update — even when the diesel particulate filter is not actually failed. Here’s what the bulletin says, why it matters, and how it connects directly to a recent 3.0 Duramax Podcast discussion.

GM has released a new bulletin for the 3.0L Duramax LZ0 explaining a brief shudder or misfire sensation during highway passing maneuvers. Surprisingly, GM says there is currently no repair and replacing engine or transmission components will not resolve the condition.

GM quietly added a new Special Coverage, N262552620, for 2021 3.0 Duramax SUVs with a known issue on glow plug #2. It is not a recall, but it does extend coverage to 15 years or 150,000 miles on affected VINs when the #2 glow plug fails and sets specific fault codes. In this article, we break down which Escalade, Tahoe, Suburban, Yukon, and Yukon XL models are included, how this policy compares to the earlier 2020 truck bulletin, and what owners should do if their check engin

Google Gemini — the smarter, more conversational AI — is now rolling out to 2022+ Duramax trucks and other GM vehicles with Google Built-in. In this guide we break down exactly why you’ll want the upgrade, plus the official step-by-step process from GM Service Bulletin #26-NA-127 to check your Android version, update Maps & Assistant, and activate Gemini in minutes. Ready to ditch the old Google Assistant for a much more capable co-pilot? Full guide and how-to inside.

GM released # 25-NA-185 (updated April 17, 2026), and it clearly outlines both the repair procedure and warranty direction.

GM has updated Engineering Information bulletin PIE0883A for 2026 3.0L Duramax (3MAX) trucks and SUVs, closing its P2463 investigation and directing technicians to inspect the turbo outlet–to–resonator connection for possible airflow issues behind the check engine light.

The latest GM service bulletin # 26-NA-090 , released on March 12, 2026 , provides key information on calibration releases for the 3.0L Duramax diesel (LZ0) in 2025 pickup trucks. This is an informational bulletin guiding dealers on available ECM (Engine Control Module) software updates to address illuminated Malfunction Indicator Lamp (MIL) concerns. Affected Vehicles Chevrolet Silverado 1500 (2025 MY) with 3.0L Diesel (LZ0), all transmissions GMC Sierra 1500 (2025 MY)

GM has updated two service bulletins addressing a frustrating issue reported by 3.0 Duramax owners: DEF warnings appearing shortly after beginning a towing trip. The documents acknowledge the behavior and introduce a software update intended to correct how the system reports DEF levels on newer Silverado and Sierra trucks.

Owners of the 2023-2024 Chevrolet Silverado 1500 and GMC Sierra 1500 equipped with the 3.0L LZ0 Duramax turbodiesel engine may experience an annoying buzz, rattle, vibration, or noise coming from the passenger side of the vehicle. This issue typically occurs under light load conditions, such as gentle acceleration, cruising at low throttle, or light engine demand. The noise can mimic an interior trim rattle or dash vibration but is actually external, originating from th

GM's new PIE0905 bulletin targets MIL illumination and DTC P0101 on 2025-2026 LZ0 Duramax models (Silverado 1500, Sierra 1500, Tahoe, Suburban, Yukon). It's an early data-collection step: dealers gather intake leak/test details to help engineers identify root causes before issuing a full TSB fix. U.S. dealers only—contact required before repairs. If your truck shows this code, see a dealer soon.

GM has updated bulletin #25-NA-299, expanding P2C7A diagnostic guidance to cover 2026 3.0L Duramax trucks and SUVs. The revision reinforces a critical point: this code is often caused by exhaust or induction leaks — not failed sensors or catalysts. Special attention should be given to front exhaust connections and the LM2 backpressure valve, with pressure testing and soap solution used to confirm leaks before replacing parts.

GM has released new service information addressing a 3.0 Duramax condition where the engine idles normally but hesitates, loses power, or stalls during acceleration. The cause points to an internal restriction in the charge air cooler hose — a component critical to proper boost and airflow on both LM2 and LZ0 engines.

General Motors has issued Safety Recall N252516560 – Momentary Rear Wheel Lock-Up , but this is not a brand-new transmission defect. Instead, this recall revisits a prior campaign to ensure the correct software calibration was actually installed. Here’s what’s going on. This Recall Ties Back to an Earlier Campaign According to the bulletin, this recall applies to certain: 2020 Chevrolet Silverado 1500 2020–2022 Chevrolet Silverado 1500 2020 Chevrolet Silverado 2500/3500 2020–

Erratic shifting, harsh gear changes, and transmission codes on your 10L80 may not be a software issue at all. A new GM bulletin reveals a hidden hydraulic failure inside the valve body that can mimic electronic problems—and explains why many trucks are misdiagnosed before the real cause is found.

GM Bulletin #26-NA-052 applies to 2026 Silverado and Sierra 1500 trucks equipped with the 3.0L LZ0 Duramax diesel. The bulletin addresses multiple fuel system and aftertreatment–related DTCs, including forced engine shutdown and emissions efficiency faults, and resolves them through an Engine Control Module calibration update—no parts required.

Written by Greg Nelson GM Technician | DuramaxNews.com Host of The 3.0 Duramax Podcast and the DemonWorks YouTube channel Bulletin: # 26-NA-001 Release Date: January 8, 2026 A newly released bulletin from General Motors highlights a front differential mounting issue on full-size GM SUVs that can escalate into frame replacement if not addressed early. While the bulletin centers on a clunking or rattling noise, the underlying failure mode makes this a critical inspection i

GM revised Bulletin 24-NA-070 on January 6, 2026, expanding coverage for 3.0 Duramax vehicles experiencing no-restart events during Auto Stop/Start operation. The update adds DTC P1098, introduces engine coolant flow control valve replacement when required, and includes expanded warranty guidance. The revision provides clearer diagnostic and repair direction beyond ECM software updates alone.

GM bulletin PIT5689M addresses no-restart after Auto Stop, intermittent no-crank, dead battery, glow plug faults, transfer case errors, and multiple warning lights on Silverado and Sierra trucks. The root cause is often a loose or damaged engine-to-body ground at the passenger-side firewall (G132/G134). Inspecting and securing this ground can prevent widespread electrical faults and unnecessary parts replacement.

Updated: December 16, 2025 Bulletin: # 25-NA-380 Applies To: Chevrolet Silverado & GMC Sierra (1500 / 2500HD / 3500HD) What Owners Are Experiencing GM has released bulletin # 25-NA-380 addressing customer complaints that only show up in cold weather , typically below 32°F (0°C) . Reported symptoms include: Harsh or stiff ride quality Increased road noise entering the cab Axle or mechanical noise that seems worse in cold temperatures What makes this issue frustrating is th

GM’s new PIE0883 bulletin investigates P2463 soot-loading issues on 2026 LZ0 Duramax engines. Dealers are asked to inspect sensors, airflow leaks, and installation quality before repairs. This follows the earlier crankshaft end-play bulletin (25-NA-307), marking another early reliability concern for the LZ0.