What is the proper break-in procedure for my new Yukon, Suburban or Tahoe?
• The manufacturer’s suggested break-in procedures are so simple on new vehicles these days, that there is basically no excuse for not following them. For the first 500 miles: • Keep the speeds under 55 or 60. • Vary the speeds. If you are on the highway, I suggest varying between 40 to 60 (or even above 60 for a few minutes), and do not use the cruise control. • Don’t tow a trailer. • Keep in mind that when you stop you will hear a popping sound from the vicinity of the exhaust system and even a slightly burning smell from the engine compartment the first time or two that you pull into your garage with your new vehicle. These are normal and should disappear (particularly the smell) after a couple of drives). • I make a point during the break-in period to systematically test each item on the vehicle, to the extent you did not do so when you picked it up from the dealer. • Finally, don’t pay too much attention to the gas mileage on your new vehicle, if you check at all, for the first 50
