2014 GMC Sierra Denali 2500HD/3500HD Oil type
SAE 5W-30
2014 GMC Sierra Denali 2500HD/3500HD Owner's Manual, PDF page 322
SAE 5W-30 is the best viscosityOpen the manual at this page ↗Added Oct 15, 2026
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Oil type · All versions · PDF page 322
SAE 5W-30 is the best viscosity
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As printed in the manual
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| All versions | SAE 5W-30 | “SAE 5W-30 is the best viscosity” | PDF page 322 ↗ |
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