8-44• Ice, snow, mud, or anything elsebuilds up on the camera lens.Clean the lens, rinse it with water,and wipe it with a soft cloth.• The back of the vehicle is in anaccident, the position andmounting angle of the camera canchange or the camera can beaffected. Be sure to have thecamera and its position andmounting angle checked at yourdealer/retailer.FuelUse of the recommended fuel is animportant part of the propermaintenance of this vehicle, keepsthe engine clean, and maintainsoptimum vehicle performance.Recommended FuelUse regular unleaded gasoline with aposted octane rating of 87 (R+M)/2or 91 RON or higher. If the octanerating is less than recommended, anaudible knocking noise, commonlyreferred to as spark knock, might beheard when driving. If this occurs,use a gasoline with therecommended rating or higher assoon as possible. If heavy knockingis heard when using gasoline withthe recommended rating, the engineneeds service.Fuel AdditivesGasoline should contain detergentadditives that will help preventengine and fuel system depositsfrom forming. Clean fuel injectorsand intake valves will allow youremission control system to workproperly. Some gasoline does notcontain sufficient quantities ofadditive to keep fuel injectors andintake valves clean. To make up forthis lack of detergency, it isrecommended that one bottle of GMFuel System Treatment PLUS (GMpart no. 88861011) be added to thefuel tank at every engine oil changeor every 15000 km, whicheveroccurs first. GM Fuel SystemTreatment PLUS is the only gasolineadditive recommended by GeneralMotors. It is available at yourdealer/retailer.srx.book Page 44 Monday, June 8, 2009 8:28 AM
