Can Your Diesel Make The Grade? A Five-Mile, Six Percent Mountain Grade in Washington State Puts Our Project 6.5L Suburban to the Test
Suburban Renewal walked you through the upgrade process for a stock 6.5L using a representative Suburban 4x4. In that article, we focused reporting on the overall reliability and performance improvements realized through the upgrades. While these are, of course, vital to the everyday use of your truck, we will now focus on the uphill, heavy towing performance gains realized as a result of the upgrades. For many of us, this is what matters the most and it is during these times of high stress that we want to be able to depend on our work trucks. We took the time to test the towing capabilities at both the near-stock configuration and after completing our regimen of upgrades. Looking at the results, you will see that, with the right modifications, the 6.5L can comfortably “make the grade” and perform as a work truck should.