2007 CADILLAC CTS fuel additives

Service........................................................ 332
Accessories and Modications................... 332
California Proposition 65 Warning.............. 333
Doing Your Own Service Work.................. 333
Adding Equipment to the Outside of
Your Vehicle.......................................... 334
Fuel............................................................. 334
Gasoline Octane........................................ 334
Gasoline Specications.............................. 335
California Fuel........................................... 335
Additives................................................... 336
Fuels in Foreign Countries........................ 336
Filling the Tank......................................... 337
Filling a Portable Fuel Container............... 339
Checking Things Under the Hood.............. 340
Hood Release........................................... 341
Engine Compartment Overview.................. 342
Engine Oil................................................. 346
Engine Oil Life System.............................. 349
Engine Air Cleaner/Filter............................ 351
Automatic Transmission Fluid.................... 353
Manual Transmission Fluid........................ 354Hydraulic Clutch........................................ 356
Engine Coolant.......................................... 356
Coolant Surge Tank Pressure Cap............ 360
Engine Overheating................................... 360
Overheated Engine Protection
Operating Mode..................................... 362
Cooling System......................................... 363
Power Steering Fluid................................. 368
Windshield Washer Fluid........................... 369
Brakes...................................................... 371
Battery...................................................... 375
Jump Starting............................................ 376
Rear Axle.................................................... 382
Headlamp Aiming........................................ 383
Bulb Replacement....................................... 386
High Intensity Discharge (HID) Lighting..... 386
Halogen Bulbs........................................... 386
Front Turn Signal and Fog Lamps............. 387
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps................................. 388
Back-Up and License Plate Lamps............ 389
Replacement Bulbs................................... 389
Section 5 Service and Appearance Care
329

If your vehicle has the 6.0L V8 engine (VIN
Code U), use premium unleaded gasoline with a
posted octane rating of 91 or higher. You may also
use regular unleaded gasoline rated at 87 octane or
higher, but your vehicle’s acceleration may be
slightly reduced, and you may notice a slight
audible knocking noise, commonly referred to as
spark knock. If the octane is less than 87, you may
notice a heavy knocking noise when you drive.
If this occurs, use a gasoline rated at 87 octane or
higher as soon as possible. Otherwise, you might
damage your engine. If you are using gasoline
rated at 87 octane or higher and you hear heavy
knocking, your engine needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 336for additional information.
California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate on
fuels that meet California specications. See
the underhood emission control label. If this fuel is
not available in states adopting California
emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 209. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the type
of fuel used, repairs may not be covered by
your warranty.
335

Additives
To provide cleaner air, all gasolines in the United
States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your fuel.
However, some gasolines contain only the
minimum amount of additive required to meet U.S.
Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves clean,
or if your vehicle experiences problems due to
dirty injectors or valves, look for gasoline that is
advertised as TOP TIER Detergent Gasoline. Also,
your dealer has additives that will help correct
and prevent most deposit-related problems.
Gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may be
available in your area. General Motors
recommends that you use these gasolines if they
comply with the specications described earlier.
However, E85 (85% ethanol) and other fuels
containing more than 10% ethanol must not be
used in vehicles that were not designed for those
fuels.Notice:Your vehicle was not designed for
fuel that contains methanol. Do not use
fuel containing methanol. It can corrode metal
parts in the fuel system and also damage
plastic and rubber parts. That damage would
not be covered under your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT.
General Motors recommends against the use of
such gasolines. Fuels containing MMT can reduce
the life of spark plugs and the performance of
the emission control system may be affected. The
malfunction indicator lamp may turn on. If this
occurs, return to your dealer for service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel might be
hard to nd. Never use leaded gasoline or any other
fuel not recommended in the previous text on fuel.
Costly repairs caused by use of improper fuel would
not be covered by your warranty.
336

A
Accessories and Modications..................... 332
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 89
Additives, Fuel............................................ 336
Add-On Electrical Equipment....................... 446
Air Cleaner/Filter, Engine............................. 351
Air Conditioning........................................... 189
Airbag
Passenger Status Indicator....................... 202
Readiness Light....................................... 201
Airbag Sensing and Diagnostic
Module (SDM).......................................... 494
Airbag System............................................... 70
What Will You See After an
Airbag Inates?...................................... 80
When Should an Airbag Inate?................. 77
Where Are the Airbags?............................. 73
Airbag Systems
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 89
How Does an Airbag Restrain?.................. 79
Passenger Sensing System....................... 82
Servicing Your Airbag-Equipped Vehicle..... 88
What Makes an Airbag Inate?.................. 79
Antenna, Diversity Antenna System............. 284Antenna, XM™ Satellite Radio Antenna
System.................................................... 284
Anti-Lock Brake System.............................. 291
Anti-Lock Brake, System Warning Light....... 206
Appearance Care
Aluminum or Chrome-Plated Wheels........ 441
Care of Safety Belts................................ 439
Chemical Paint Spotting........................... 443
Cleaning Exterior Lamps/Lenses.............. 440
Cleaning the Inside of Your Vehicle.......... 435
Fabric/Carpet........................................... 437
Finish Care.............................................. 440
Finish Damage......................................... 442
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 438
Leather.................................................... 438
Sheet Metal Damage............................... 442
Speaker Covers....................................... 439
Tires........................................................ 442
Underbody Maintenance........................... 443
Vehicle Care/Appearance Materials.......... 444
Washing Your Vehicle.............................. 439
Weatherstrips........................................... 439
Windshield and Wiper Blades................... 441
Wood Panels........................................... 439
Ashtray....................................................... 188
Audio System.............................................. 258
503

F
Filter
Engine Air Cleaner................................... 351
Finish Damage............................................ 442
Flashers, Hazard Warning........................... 168
Flash-to-Pass.............................................. 172
Flat Tire...................................................... 422
Flat Tire, Changing...................................... 424
Flat Tire, Storing......................................... 433
Fluid
Automatic Transmission............................ 353
Manual Transmission................................ 354
Power Steering........................................ 368
Windshield Washer.................................. 369
Fog Lamp
Fog .......................................................... 183
Fog Lamp Light........................................... 213
Folding Rear Seat......................................... 18
Fuel............................................................ 334
Additives.................................................. 336
California Fuel.......................................... 335
Filling a Portable Fuel Container.............. 339
Filling Your Tank...................................... 337Fuel (cont.)
Fuels in Foreign Countries....................... 336
Gage....................................................... 214
Gasoline Octane...................................... 334
Gasoline Specications............................ 335
Fuses
Fuses and Circuit Breakers...................... 447
Rear Underseat Fuse Block..................... 451
Underhood Fuse Block............................. 447
Windshield Wiper..................................... 446
G
Gage
Engine Coolant Temperature.................... 208
Fuel......................................................... 214
Speedometer........................................... 200
Tachometer.............................................. 200
Garage Door Opener................................... 147
Gasoline
Octane..................................................... 334
Specications........................................... 335
Glove Box................................................... 159
GM Mobility Reimbursement Program.......... 488
508