1994 GMC C3500HD Oil Capacity, Types, & Filters
Your ultimate DIY maintenance guide for the 1994 GMC C3500HD oil change is here! No more searching – find all the critical oil specs for your 1994 GMC C3500HD, including exact engine oil capacity, the manufacturer recommended oil viscosity and type, and the correct OEM and aftermarket oil filters.
We cover all available engine options categorized by their specific engine codes, ensuring you get pinpoint accuracy for your specific vehicle configuration. Keep reading to discover everything required for a successful 1994 GMC C3500HD oil change!
Scroll Table ➜
| Engine & Code | Oil Filter |
|---|---|
| 5.7L 8-cylinder L65 Diesel Turbo | GM 19431429 GM 25013454 |
| 6.5L 8-cylinder K | GM 19431429 |
| 7.4L 8-cylinder N | GM 19431429 |
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Select Your 1994 GMC C3500HD Engine Option
5.7L 8-cylinder Engine Code L65 Diesel Turbo
Engine:
5.7L 8-cylinder L65 Diesel Turbo [aka 5.7L V8 (Gas)]
Body & Trims:
Base
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468 and 25322841
6.5L 8-cylinder Engine Code K
Engine:
6.5L 8-cylinder K [aka 6.5L V8 (Diesel)]
Body & Trims:
Base
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468
1994 GMC C3500HD 6.5L 8-cylinder K oil change details
Wix Oil Filter:
7.4L 8-cylinder Engine Code N
Engine:
7.4L 8-cylinder N [aka 7.4L V8 (Gas)]
Body & Trims:
Base
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468
People also ask – 1994 GMC C3500HD
What is the oil capacity of a 1994 GMC C3500HD?
The 1994 GMC C3500HD oil capacity depends on the specific engine option. Here is the exact oil capacity breakdown for each available engine configuration:
• 5.7L 8-cylinder (L65 Diesel Turbo): Check Owner's Manual
• 6.5L 8-cylinder (K): Check Owner's Manual
• 7.4L 8-cylinder (N): Check Owner's Manual
Always check your dipstick after refilling to ensure the proper level.
What type of oil does a 1994 GMC C3500HD use?
Across its 3 available engine configurations, the 1994 GMC C3500HD uses the motor oil viscosities listed below. Using the correct manufacturer-approved oil weight is crucial for engine health. Here are the specific oil type requirements by engine:
• 5.7L 8-cylinder (L65 Diesel Turbo):See Cap or Owner's Manual
• 6.5L 8-cylinder (K):
See Cap or Owner's Manual
• 7.4L 8-cylinder (N):
See Cap or Owner's Manual
What is the best oil filter for the 1994 GMC C3500HD?
The proper oil filter depends on your exact engine code. The 1994 GMC C3500HD utilizes the following premium aftermarket Wix oil filters across its lineup: 51060-EA. Here is the specific OEM and aftermarket filter data for each engine:
• 5.7L 8-cylinder (L65 Diesel Turbo):OEM Filter: GM 19431429 or GM 25013454
Wix Filter: 51060-EA
• 6.5L 8-cylinder (K):
OEM Filter: GM 19431429
Wix Filter: 51060-EA
• 7.4L 8-cylinder (N):
OEM Filter: GM 19431429
Wix Filter: 51060-EA
How often should I change the oil in my 1994 GMC C3500HD?
For modern models running full synthetic oil, oil change intervals are typically every 7,500 to 10,000 miles. However, for older GMC C3500HD generations (1985-2010) or those using conventional/synthetic-blend fluid, changing the oil and filter every 3,000 to 5,000 miles is highly recommended to prevent sludge buildup. Regardless of engine (5.7L 8-cylinder, 6.5L 8-cylinder and 7.4L 8-cylinder), you should change your oil at least once a year even if you don’t reach the mileage limit.