2005 GMC TopKick Coolant
2005 GMC TopKick coolant for each version, from the owner's manual with page references. Values differ by version; see each version.

Depends on your version. Choose yours, or compare them here.
- C6/C7/C8 manual transmission, 7.2L 207-230 hp 29.3 quarts capacity
- C6/C7/C8 manual transmission, 7.2L 207-230 hp with A/C and increased cooling 33.0 quarts capacity
- C6/C7/C8 manual transmission, 7.2L 250-300 hp 32.8 quarts capacity
- C6/C7/C8 manual transmission, 7.2L 250-300 hp with A/C and increased cooling 33.3 quarts capacity
- C6/C7/C8 manual transmission, 7.8L 200-230 hp 31.6 quarts capacity
- C6/C7/C8 manual transmission, 7.8L 200-230 hp with A/C and increased cooling 35.3 quarts capacity
- C6/C7/C8 manual transmission, 7.8L 250-300 hp 34.9 quarts capacity
- C6/C7/C8 manual transmission, 7.8L 250-300 hp with A/C and increased cooling 35.4 quarts capacity
- C6/C7/C8 manual transmission, 8.1L 33.3 quarts capacity
- C6/C7/C8 manual transmission, 8.1L with A/C and increased cooling 34.9 quarts capacity
29.3quarts
Capacity · C6/C7/C8 manual transmission, 7.2L 207-230 hp
33.0quarts
Capacity · C6/C7/C8 manual transmission, 7.2L 207-230 hp with A/C and increased cooling
32.8quarts
Capacity · C6/C7/C8 manual transmission, 7.2L 250-300 hp
33.3quarts
Capacity · C6/C7/C8 manual transmission, 7.2L 250-300 hp with A/C and increased cooling
31.6quarts
Capacity · C6/C7/C8 manual transmission, 7.8L 200-230 hp
35.3quarts
Capacity · C6/C7/C8 manual transmission, 7.8L 200-230 hp with A/C and increased cooling
34.9quarts
Capacity · C6/C7/C8 manual transmission, 7.8L 250-300 hp
35.4quarts
Capacity · C6/C7/C8 manual transmission, 7.8L 250-300 hp with A/C and increased cooling
33.3quarts
Capacity · C6/C7/C8 manual transmission, 8.1L
34.9quarts
Capacity · C6/C7/C8 manual transmission, 8.1L with A/C and increased cooling
2005 GMC TopKick Owner's Manual, PDF page 318
29.3 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 207-230 hp · PDF page 318
29.3 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 207-230 hp with A/C and increased cooling · PDF page 318
33.0 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 250-300 hp · PDF page 318
32.8 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 250-300 hp with A/C and increased cooling · PDF page 318
33.3 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 200-230 hp · PDF page 318
31.6 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 200-230 hp with A/C and increased cooling · PDF page 318
35.3 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 250-300 hp · PDF page 318
34.9 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 250-300 hp with A/C and increased cooling · PDF page 318
35.4 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 8.1L · PDF page 318
33.3 quarts
Coolant (capacity) · C6/C7/C8 manual transmission, 8.1L with A/C and increased cooling · PDF page 318
34.9 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
29.3 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 207-230 hp · PDF page 318
29.3 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
33.0 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 207-230 hp with A/C and increased cooling · PDF page 318
33.0 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
32.8 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 250-300 hp · PDF page 318
32.8 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
33.3 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.2L 250-300 hp with A/C and increased cooling · PDF page 318
33.3 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
31.6 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 200-230 hp · PDF page 318
31.6 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
35.3 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 200-230 hp with A/C and increased cooling · PDF page 318
35.3 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
34.9 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 250-300 hp · PDF page 318
34.9 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
35.4 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 7.8L 250-300 hp with A/C and increased cooling · PDF page 318
35.4 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
33.3 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 8.1L · PDF page 318
33.3 quarts
2005 GMC TopKick Owner's Manual, PDF page 318
34.9 quartsOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Coolant (capacity) · C6/C7/C8 manual transmission, 8.1L with A/C and increased cooling · PDF page 318
34.9 quarts

All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| C6/C7/C8 manual transmission, 7.2L 207-230 hp | 29.3 quartscapacity | “29.3 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.2L 207-230 hp with A/C and increased cooling | 33.0 quartscapacity | “33.0 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.2L 250-300 hp | 32.8 quartscapacity | “32.8 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.2L 250-300 hp with A/C and increased cooling | 33.3 quartscapacity | “33.3 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.8L 200-230 hp | 31.6 quartscapacity | “31.6 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.8L 200-230 hp with A/C and increased cooling | 35.3 quartscapacity | “35.3 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.8L 250-300 hp | 34.9 quartscapacity | “34.9 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 7.8L 250-300 hp with A/C and increased cooling | 35.4 quartscapacity | “35.4 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 8.1L | 33.3 quartscapacity | “33.3 quarts” | PDF page 318 ↗ |
| C6/C7/C8 manual transmission, 8.1L with A/C and increased cooling | 34.9 quartscapacity | “34.9 quarts” | PDF page 318 ↗ |
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