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.

GM’s new 25-NA-369 bulletin tackles steady-speed vibration between 25–80 mph on 2021–2026 1500 trucks and SUVs. While many assume torque-converter shudder, the bulletin shows how sensitive the 10-speed is to Dexron ULV fluid condition and explains how to diagnose other common causes. GM requires a structured GDS/PICO diagnosis and a 20-quart ULV exchange only when TCC shudder is verified.

GM has updated bulletin #25-NA-185 for 3.0L Duramax coolant control valve failures, expanding coverage and requiring ECM calibration checks during replacement. Two related Special Coverages (N252508341 for LM2 and N252508340 for 2023 LZ0) may provide 15-year/150k-mile protection depending on VIN. This update clarifies repair paths and coverage options for owners.

If your Chevy or GMC infotainment screen is stuck on “Device is Starting…” and never loads the Home screen, you’re not the only one. GM has released bulletin PIC6630 with a specific software repair that lets dealers recover the A11 radio without always replacing hardware. In this article, I walk through the simple resets I would try at home first to avoid a service visit, and then explain exactly what your dealer will do using the Radio Data Reset function and a fresh softwar

GM has issued safety recall N252532020 for certain 2026 Chevrolet Silverado 1500, 2500HD, and 3500HD trucks that left the factory without a printed owner’s manual. Because the manual contains required FMVSS/CMVSS safety information on child seat anchors and crash protection, dealers must now provide and install the correct book in the glove box at no charge to the owner.

GM has released bulletin #25-NA-325 for 2026 Silverado and Sierra 1500 trucks equipped with the LZ0 3.0 Duramax and 10L80 (MQB) transmission to address a harsh or jerky engagement when the engine restarts after an Auto Stop event. The fix is a Transmission Control Module (TCM) software update, which dealers can apply after checking for the latest calibration, with no hard parts replaced.

Bulletin: GM Service Bulletin # 25-NA-202 (Oct 21, 2025) — “LZ0 Turbocharger Replacement.” Vehicles: 2023–2026 Silverado/Sierra 1500 (LZ0), 2025 Tahoe/Suburban/Yukon with LZ0. The Issue? GM notes a portion of LZ0 turbo failures are associated with incorrect engine oil and/or low oil level . Translation: your turbo’s life hinges on using the exact diesel spec and keeping the sump properly filled. (Bulletin # 25-NA-202 summary.) What “wrong oil” means on the LZ0 The 3.0L Du