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 has quietly brought back a feature that a lot of truck owners asked for — the Trailer Light Test  inside the myChevrolet  and myGMC  mobile apps. If you tow regularly, this is one of those small updates that actually makes life easier. What Is the Trailer Light Test? The Trailer Light Test allows you to cycle your trailer lights directly from your phone , so you can stand behind the trailer and confirm everything is working — without climbing in and out of the cab. The tes

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.

General Motors has launched a new emissions recall that affects certain 2024 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L L5P Duramax. Recall ID:  N242438500 Title:  ECM OBD – Selective Catalyst Reduction (SCR) Fault Detection Release Date:  November 2025 Applies To: 2024 Chevrolet Silverado 2500HD / 3500HD (L5P 6.6L Duramax) 2024 GMC Sierra 2500HD / 3500HD (L5P 6.6L Duramax) This is a voluntary emissions  recall focused on the software that monitors

GM’s Customer Satisfaction Program N252507990 addresses an out-of-spec jack kit lifting rod on select 2025 GM trucks and SUVs. Dealers will replace the lifting rod at no charge through December 31, 2027. Learn which models are affected, how to check your VIN, and what to expect at the dealer.

When news broke that OXE Marine and GM Marine  had signed a development agreement to use Duramax engines  in a new generation of diesel outboards, most people saw it as a marine story. For 3.0 Duramax owners, it is something else entirely: It’s a strong signal that GM sees the LZ0 3.0L Duramax inline-six  as a long-term platform, not a short-lived experiment. In this article, we’ll break down what the agreement actually says, why it matters for truck and SUV owners, and how a

This will be the location for a compilation of build dates that hav / have not had an engine failure. The purpose of this article is to give us some sort of timestamp as to when these engines / vehicles were actually built. Hopefully set some minds at ease as well to show how many true failures there have been. this is a small sampling from a video posted here: https://youtu.be/WmlzcwNtdjY UPDATE - 11/11 9:10 PM Update 11/12 7:45 - No new engine failures to report UPDATE - 11

GM released a Gen-3 service valve body for 10L60/80/90. It improves robustness and sediment control, removes the auxiliary body, relocates key solenoids, simplifies harnessing and flow, deletes the internal TBV lineup on certain RPOs, and includes a revised bolt kit. First field units appeared around Aug 2025; bulletin issued Oct 29, 2025.

Truck:  2024 Chevrolet Silverado 1500 ZR2 Goal:  Fit the tallest tire possible without any modifications  (no trimming, no spacers, no level kit) and document real‑world results. TL;DR It fits:  An LT285/75R18 (~35")  mounted on OEM 18" ZR2 wheels fits without trimming  for normal driving. Edge case rub:  At full steering lock while reversing into a driveway , there is a faint rub only as the suspension compresses over the bump . Daily driving and forward lock tests were clea

Swapped my 2024 Silverado 1500 ZR2 from 275/70R18 to the exact LT285/75R18 E tires used on the Silverado EV Trail Boss. Fitment is clean—only a faint rub at full lock in reverse as the suspension compresses; no trimming yet. The big question is PSI. Don’t copy the EV’s ~56 psi placard (that truck’s ~3,000 lb heavier), and don’t stay at stock ~38 either. With LT-E you set pressure by load: start 46–48 psi cold empty; 58–62 psi rear when towing; fine-tune via hot-rise/tread che