Based on data from 18 vehicles, 1,253 fuel-ups and 342,389 miles of driving, the 1999 GMC Sonoma gets a combined Avg MPG of 21.04 with a 0.22 MPG margin of error.

Any Engine Type 2.2L L4 GAS (6) 4.3L V6 GAS (7) L4 GAS (1) V6 GAS (3) V8 GAS (1) Any Body Style Sport Utility (1) Standard Cab Pickup (3) Any Submodel SL (4) SLS (9) Other (5)

Below you can see a distribution of the fuel-ups with 31 outliers (2.41%) removed.

Following shows the average MPG of each of the 18 vehicles in the system.

• Sonoma truck

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed
  Added Jul 2017 • 30 Fuel-ups

  Property of drix226

• 18.1 Avg MPG

• GMC Sonoma

  1999 GMC Sonoma SLS 2.2L L4 GAS Manual 5 Speed
  Added Sep 2016 • 76 Fuel-ups

  Property of estimmel

• 18.5 Avg MPG

• James Wilson (GMC)(SOLD)

  1999 GMC Sonoma SL 4.3L V6 GAS Automatic Standard Cab Pickup
  Added Mar 2021 • 10 Fuel-ups

  Property of JamesDWilson

• 14.7 Avg MPG

• Sonoma

  1999 GMC Sonoma SLS 2.2L L4 GAS Automatic 4 Speed
  Added Oct 2017 • 159 Fuel-ups

  Property of tjbytheway

• 20.0 Avg MPG

• My Sonoma

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed
  Added Jul 2018 • 78 Fuel-ups

  Property of supercamaro383

• 19.7 Avg MPG

• X Old Red

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed
  Added Feb 2018 • 17 Fuel-ups

  Property of JTD-3SV

• 13.9 Avg MPG

• My Sonoma

  1999 GMC Sonoma SLS 2.2L L4 GAS Standard 5 Speed
  Added Jul 2018 • 8 Fuel-ups

  Property of cy13

• 23.0 Avg MPG

• cyclone

  1999 GMC Sonoma SS V8 GAS Standard 5 Speed
  Added Jun 2017 • 8 Fuel-ups

  Property of jee12

• 12.6 Avg MPG

• Sonoma

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 37 Fuel-ups

  Property of petehd

• 16.6 Avg MPG

• Sonoma

  1999 GMC Sonoma SL 2.2L L4 GAS Standard 5 Speed Standard Cab Pickup
  Added Mar 2015 • 21 Fuel-ups

  Property of rjewkes

• 13.6 Avg MPG

• Gold Sonoma

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed Sport Utility
  Added Jan 2014 • 15 Fuel-ups

  Property of Catkiller

• 19.6 Avg MPG

• Sonoma

  1999 GMC Sonoma SL 2.2L L4 GAS Standard 5 Speed
  Added Mar 2017 • 72 Fuel-ups

  Property of 1moment

• 21.3 Avg MPG

• My Sonoma

  1999 GMC Sonoma SL 2.2L GAS L4 Standard 5 Standard Cab Pickup (2 Door)
  Added Nov 2014 • 651 Fuel-ups

  Property of Lonewolf147

• 23.0 Avg MPG

• Sonoma

  1999 GMC Sonoma GAS V6
  Added Jun 2013 • 12 Fuel-ups

  Property of c699

• 20.4 Avg MPG

• Little Truck

  1999 GMC Sonoma GAS V6
  Added Feb 2014 • 23 Fuel-ups

  Property of RescueTech226

• 20.7 Avg MPG

• Little Truckie

  1999 GMC Sonoma GAS L4
  Added May 2012 • 57 Fuel-ups

  Property of Snugs

• 22.7 Avg MPG

• Sonoma

  1999 GMC Sonoma SLS 4.3L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 85 Fuel-ups

  Property of GWalsh

• 19.1 Avg MPG

• 99 Gmc sonoma

  1999 GMC Sonoma GAS V6
  Added Jan 2013 • 14 Fuel-ups

  Property of brown99sonoma

• 12.9 Avg MPG