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 item rather than a...

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.