Vehicle Specs & ECU Tuning
1985 GMC S15 Pickup 2WD
Small Pickup Trucks · Diesel · 9 engine/trim variants
Engine & economy specifications
| Engine | Fuel | Transmission | Drive | MPG (US) | CO2 |
|---|---|---|---|---|---|
| 2.2L 4-cyl | Diesel | Manual 4-spd | Rear-Wheel Drive | 26 city / 30 hwy / 27 comb | 377 g/mi |
| 2.2L 4-cyl | Diesel | Manual 5-spd | Rear-Wheel Drive | 25 city / 30 hwy / 27 comb | 377 g/mi |
| 2.8L 6-cyl | Regular | Automatic 4-spd | Rear-Wheel Drive | 17 city / 23 hwy / 19 comb | 467.7 g/mi |
| 2.8L 6-cyl | Regular | Manual 4-spd | Rear-Wheel Drive | 17 city / 23 hwy / 19 comb | 467.7 g/mi |
| 2.8L 6-cyl | Regular | Manual 5-spd | Rear-Wheel Drive | 16 city / 23 hwy / 19 comb | 467.7 g/mi |
| 1.9L 4-cyl | Regular | Manual 4-spd | Rear-Wheel Drive | 21 city / 27 hwy / 23 comb | 386.4 g/mi |
| 2.5L 4-cyl | Regular | Automatic 4-spd | Rear-Wheel Drive | 18 city / 25 hwy / 21 comb | 423.2 g/mi |
| 2.5L 4-cyl | Regular | Manual 4-spd | Rear-Wheel Drive | 19 city / 24 hwy / 21 comb | 423.2 g/mi |
| 2.5L 4-cyl | Regular | Manual 5-spd | Rear-Wheel Drive | 20 city / 26 hwy / 22 comb | 404 g/mi |
ECU tuning options for the 1985 GMC S15 Pickup 2WD
Diesel engines benefit most from emissions-system optimisation (DPF, EGR, AdBlue) for off-road and motorsport use, plus Stage tuning where the ECU is supported in our database.
How it works
Read the ECU with any tool (KESS, KTAG, Autotuner, MPPS, bench or OBD), open the .bin in Softechpro, select the services above, and the software applies the changes and recalculates the checksum automatically — ready to flash back. Coverage is strongest on VAG, BMW and Mercedes (Bosch EDC15/16/17, MD1, MG1, MED17, Siemens, Delphi). New accounts get 5 free files to test compatibility before buying. We do not offer manual or custom tuning — services are automatic where the ECU is supported.
Other GMC models
Explore tuning for this GMC
Specs sourced from the public-domain US EPA fuel-economy database (MPG in US gallons). Emissions-off services are for off-road / motorsport / closed-course use only; the operator is responsible for legal use in their country.