Quick Summary
Looking for the correct oil type for your 1991 GMC C2500? According to factory specs, the 7.4L 8 -cyl Engine Code [N] N requires 10W-30 viscosity oil. Using the right oil capacity of 7.0 QUARTS ensures engine longevity and fuel efficiency.
๐ข๏ธ 7.4L 8 -cyl Engine Code [N] N
Verified Data
Capacity
7.0 QUART
Viscosity
10W-30
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Recommended Maintenance Products
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Oil Filter
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Drain Plug Gasket
Replace every oil change - don't reuse!
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Oil Drain Pan
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Funnel Set
No-spill oil pouring
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Mechanic Gloves
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Common Trouble Codes for 1991 GMC C2500
Get vehicle-specific repair guides for these codes