Document LK7NyRDp5YM70JbgojVn7oxz5

General Motors GfirerU :Vo!: ;s U.C Compnanc-s & uitm cistion A1C 4K--3:i. ouCi VRfora Provino Qcoun OD General rViorers Rood W fa - d . M ic h ig a n 4-SB-RR June 29, 2018 GM142 Mr. Christopher Grundler Director, Office of Transportation and Air Quality EPA National Vehicle and Fuel Emissions Laboratory/OAR 2565 Plymouth Road Ann Arbor, Ml 48105 Dear GTAQ Director Grundler: Subject: GIVI Fuel Economy Test Fuel Plan for 2020 and Subsequent Model Years This letter is to notify the United States Environmental Protection Agency (EPA) that General Motors Company (GM) will continue to use Tier 2 (EG) test fuels in accordance with the interim provisions at 40 C.F.R. 600.117 for Corporate Average Fuel Economy (CAFE) and greenhouse gas (GHG) development and certification testing and labeling for MY2G2G. This is consistent with EPA's intent to a lo w manufacturers "to continue to test for CAFE, GHG, and labeling purposes on Tier 2 test fuels for each ... FEDV until such time as EPA determines appropriate adjustments, if any, related to a change to Tier 3 test fuels."1 GM will continue to use E0 test fuel and follow the interim provisions for development and certification of subsequent model year vehicles "until the future action mentioned above takes e ffe ct"2 Sincerely, c: William Wehrum, Assistant Administrator dna Director, Certification and Compliance iotors Company 1Control of Air Pollution from Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards; Final Rule, 79 Fed. Reg. 23414, 23531 (Apr. 28,2014). id. at 23532. Sierra Club v. EPA 18cv3472 NDCA Tier 5 ED 002061 00181039-00001