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

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

GM bulletin 25-NA-307 (LZ0 3.0 Duramax, 2025–2026) links bellhousing-area noise + MIL/P06DD to excessive crankshaft end play (possible thrust-bearing failure). Dealers should measure end play at the crank pulley bolt with a dial indicator; spec is 0.084–0.316 mm (0.0033–0.0124 in). Expect to pay diagnostic time for the check; if out of spec, repairs proceed per SI.

GM has issued TSB #25-NA-255 for 2021–2024 trucks and SUVs with the 10-speed. Instead of replacing the valve body for P0747, the fix now calls for a new feed-limit valve, spring, and spacer plate—marking a major shift in how dealers handle this common transmission failure.

Release:  September 2025 • Bulletin:  N252508341 • Applies to (LM2 3.0L Duramax):Chevrolet:  Silverado 1500 (2021–2022), Suburban...

Release:  September 2025 • Bulletin:  N252508340 • Applies to:  2023 Chevrolet Silverado 1500 / 2023 GMC Sierra 1500 with LZ0  3.0L...

You’ve seen the window sticker. You’ve read the marketing. And if you’re like me, you’ve probably asked yourself: “Okay, but can this...

P2C7A on the 3.0 Duramax means the SCR/NOx catalyst isn’t meeting efficiency. Learn the real causes, exact diagnostics, and fixes for LM2/LZ0.

GM has released Service Update #N252510321  for select Cadillac, Chevrolet, and GMC vehicles. This is a phased launch  rolling out August...

If you’ve been driving your 3.0 Duramax-equipped truck or SUV, you're likely familiar with the frustration of a Diesel Exhaust Fluid...

The landscape of automotive emissions is constantly evolving, and for Duramax diesel enthusiasts, a significant change is on the horizon....

For Duramax diesel owners, the fuel system is the lifeline of your vehicle’s performance, delivering the power and efficiency you rely...

For many 3.0L Duramax owners, especially those with 2023+ LZ0 models who frequently tow, a new and deeply frustrating phenomenon is...

When it comes to protecting your 3.0L Duramax Diesel engine, few components are as critical—and as misunderstood—as the fuel filter. For...

Video Reference: I STOPPED USING 0W20 - My Oil Analysis said 5W30 is Safer When it comes to maintaining the longevity and performance of...