2025 Gmc Sierra Hd Problems. Get reliability information for the 2025 gmc sierra 3500hd from consumer reports, which combines extensive survey data and expert technical knowledge. Mid summer is the 'normal' timeframe for model year changeover.
My 2025 came in this week and iโm beyond happy. Gm has issued a service update to address a problem with sediment in 2024 to 2025 gmc sierra hd transmission fluid, with a filter and fluid change as the fix.