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Yesterday, 10:25

Robyn replied to a thread Mileage for a mechanical 6.5 Suburban 2500. in 6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance

Dick At those high ambient temps the R134 AC systems can tend to be a little tough to keep super cold air at low RPM You may well need to "Top...

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08-25-2025, 14:18

arveetek replied to a thread Mileage for a mechanical 6.5 Suburban 2500. in 6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance

My electronic 6.5L in my 2 door Tahoe averages 16-17 mpg. Best tank ever was 19.5 mpg. I have family born and raised here in SW Missouri. They...

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5 replies | 2644 view(s)
08-25-2025, 11:26

DickWells replied to a thread Mileage for a mechanical 6.5 Suburban 2500. in 6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance

Thanks, Robyn and DD. The old gal was a delight, for the whole trip to Phoenix and back. Had a bit of sinking "pit of the stomach", when we got...

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5 replies | 2644 view(s)
08-25-2025, 07:29

Robyn replied to a thread Mileage for a mechanical 6.5 Suburban 2500. in 6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance

Those numbers are right in the ball park with Suburbans we have had. Best we ever saw with our 1994 6.5 (DS4 PUMP) was 18 mpg

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5 replies | 2644 view(s)

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