2004 Chevrolet TrailBlazer Owner ManualSeats and Restraint Systems . 1-1Front Seats . 1-2Rear Seats. 1-6Safety Belts. 1-8Child Restraints. 1-28Air Bag Systems. 1-49Restraint System Check. 1-58Features and Controls . 2-1Keys. 2-3Doors and Locks. 2-8Windows . 2-14Theft-Deterrent Systems . 2-16Starting and Operating Your Vehicle. 2-18Mirrors . 2-34OnStar System. 2-37HomeLink Transmitter. 2-39Storage Areas. 2-42Sunroof. 2-50Vehicle Personalization. 2-50Instrument Panel . 3-1Instrument Panel Overview . 3-4Climate Controls. 3-20Warning Lights, Gages and Indicators. 3-32Driver Information Center (DIC). 3-48Audio System(s) . 3-61MDriving Your Vehicle . 4-1Your Driving, the Road, and Your Vehicle. 4-2Towing. 4-44Service and Appearance Care . 5-1Service . 5-3Fuel . 5-4Checking Things Under the Hood. 5-10Rear Axle. 5-46Four-Wheel Drive. 5-46Front Axle. 5-47Bulb Replacement. 5-48Windshield Wiper Blade Replacement. 5-49Tires. 5-52Appearance Care. 5-83Vehicle Identification. 5-91Electrical System . 5-92Capacities and Specifications. 5-104Maintenance Schedule . 6-1Maintenance Schedule . 6-2Customer Assistance and Information . 7-1Customer Assistance and Information. 7-2Reporting Safety Defects . 7-10Index . 1

Canadian OwnersYou can obtain a French copy of this manual from yourdealer or from:Helm, IncorporatedP.O. Box 07130Detroit, MI 48207GENERAL MOTORS, GM, the GM Emblem,CHEVROLET, the CHEVROLET Emblem and the nameTRAILBLAZER/TRAILBLAZER EXT are registeredtrademarks of General Motors Corporation.This manual includes the latest information at the time itwas printed. We reserve the right to make changesafter that time without further notice. For vehicles firstsold in Canada, substitute the name “General Motors ofCanada Limited” for Chevrolet Motor Division wheneverit appears in this manual.Please keep this manual in your vehicle, so it will bethere if you ever need it when you’re on the road. If yousell the vehicle, please leave this manual in it so thenew owner can use it.Litho in U.S.A.Part No. C2438 A First EditioniiHow to Use This ManualMany people read their owner’s manual from beginningto end when they first receive their new vehicle. Ifyou do this, it will help you learn about the features andcontrols for your vehicle. In this manual, you will findthat pictures and words work together to explain things.IndexA good place to look for what you need is the Index inback of the manual. It is an alphabetical list of whatis in the manual, and the page number where you willfind it. Copyright General Motors Corporation 06/16/03All Rights Reserved

Safety Warnings and SymbolsYou will find a number of safety cautions in this book.We use a box and the word CAUTION to tell you aboutthings that could hurt you if you were to ignore thewarning.You will also find a circlewith a slash through it inthis book. This safetysymbol means “Don’t,”“Don’t do this” or “Don’t letthis happen.”{CAUTION:These mean there is something that could hurtyou or other people.In the caution area, we tell you what the hazard is.Then we tell you what to do to help avoid or reduce thehazard. Please read these cautions. If you don’t, youor others could be hurt.iii

Vehicle Damage WarningsVehicle SymbolsAlso, in this book you will find these notices:Your vehicle has components and labels that usesymbols instead of text. Symbols, used on your vehicle,are shown along with the text describing the operationor information relating to a specific component, control,message, gage or indicator.Notice: These mean there is something that coulddamage your vehicle.A notice will tell you about something that can damageyour vehicle. Many times, this damage would not becovered by your warranty, and it could be costly. Butthe notice will tell you what to do to help avoidthe damage.When you read other manuals, you might seeCAUTION and NOTICE warnings in different colors or indifferent words.You’ll also see warning labels on your vehicle. They usethe same words, CAUTION or NOTICE.ivIf you need help figuring out a specific name of acomponent, gage or indicator, reference the followingtopics: Seats and Restraint Systems in Section 1Features and Controls in Section 2Instrument Panel Overview in Section 3Climate Controls in Section 3Warning Lights, Gages and Indicators in Section 3Audio System(s) in Section 3Engine Compartment Overview in Section 5

These are some examples of symbols you may find on your vehicle:v


Section 1Seats and Restraint SystemsFront Seats .1-2Manual Seats .1-2Power Seats .1-2Manual Lumbar .1-3Power Lumbar .1-3Heated Seats .1-3Reclining Seatbacks .1-4Head Restraints .1-5Rear Seats .1-6Rear Seat Operation .1-6Safety Belts .1-8Safety Belts: They Are for Everyone .1-8Questions and Answers About Safety Belts .1-13How to Wear Safety Belts Properly .1-14Driver Position .1-14Safety Belt Use During Pregnancy .1-20Right Front Passenger Position .1-21Rear Seat Passengers .1-21Rear Safety Belt Comfort Guides forChildren and Small Adults .1-24Safety Belt Extender .1-28Child Restraints .1-28Older Children .1-28Infants and Young Children .1-31Child Restraint Systems .1-34Where to Put the Restraint .1-37Top Strap .1-38Top Strap Anchor Location .1-39Lower Anchorages and Top Tethers forChildren (LATCH System) .1-40Securing a Child Restraint Designed forthe LATCH System .1-42Securing a Child Restraint in a RearOutside Seat Position .1-43Securing a Child Restraint in the CenterSeat Position .1-46Securing a Child Restraint in the RightFront Seat Position .1-46Air Bag Systems .1-49Where Are the Air Bags? .1-52When Should an Air Bag Inflate? .1-54What Makes an Air Bag Inflate? .1-55How Does an Air Bag Restrain? .1-56What Will You See After an AirBag Inflates? .1-56Servicing Your Air Bag-Equipped Vehicle .1-58Restraint System Check .1-58Checking Your Restraint Systems .1-58Replacing Restraint System PartsAfter a Crash .1-591-1

Front SeatsManual Seats{CAUTION:You can lose control of the vehicle if you try toadjust a manual driver’s seat while the vehicleis moving. The sudden movement could startleand confuse you, or make you push a pedalwhen you don’t want to. Adjust the driver’sseat only when the vehicle is not moving.Pull up on the lever located under the front of themanual seat to unlock it. Slide the seat to where you wantit and release the lever. Then try to move the seat withyour body to make sure the seat is locked into place.Power SeatsIf you have this feature,the power seat controlsare located on theoutboard side of the frontseat cushions. Thehorizontal control adjuststhe seat cushion andthe vertical control adjuststhe seatback. Move the front of the seat control up or down toadjust the front portion of the cushion. Move the rear of the seat control up or down toadjust the rear portion of the cushion. Lift up or push down on the center of the seatcontrol to move the entire seat up or down. To move the seat forward or rearward, slide theseat control forward or rearward. To recline the seatback, press the vertical controlrearward. To raise the seatback, press the verticalcontrol forward.1-2

Manual LumbarYour vehicle may have this feature. This control islocated on the outboard side of the seat.Turn the knob counterclockwise to increase lumbarsupport and clockwise to decrease lumbar support.Power LumbarYour vehicle may have this feature. The driver’s andpassenger’s seatback lumbar support can be adjustedby moving a single control located on the outboardside of the seat cushions. To increase or decreasesupport, hold the control forward or rearward.Keep in mind that as your seating position changes, asit may during long trips, so should the position ofyour lumbar support. Adjust the seat as needed.Heated SeatsYour vehicle may haveheated front seats. Thebuttons used to control thisfeature are located onthe front door armrests.The engine must berunning for the heated seatfeature to work.To heat the entire seat, press the horizontal button withthe heated seat symbol. Press the button repeatedlyto cycle through the temperature settings of high,medium, low and off. The indicator lights will glow todesignate the level of heat selected: three for high, twofor medium and one for low. The low setting warmsthe seatback and cushion until the seat temperature isnear body temperature. The medium and highsettings heat the seatback and seat cushion to a slightlyhigher temperature. You will be able to feel heat inabout two minutes.1-3

To heat only the seatback, press the button with thewords BACK ONLY. An indicator light on the switch willglow to designate that only the seatback is beingheated. Additional presses will cycle through the heatlevels for the seatback only. Press the horizontal buttonagain to heat the whole seat.The feature will shut off automatically when the ignitionis turned off.Reclining SeatbacksIf your vehicle has a manual recliner, lift the leverlocated on the outboard side of the seat and push theseatback rearward to recline the seatback. To return theseatback to the normal position, lift the lever withoutpushing rearward on the seatback and the seatback willmove forward.If your vehicle has power seat controls, the verticalpower seat control described earlier allows the seatbackto recline.1-4But don’t have a seatback reclined if your vehicle ismoving.

Head Restraints{CAUTION:Sitting in a reclined position when your vehicleis in motion can be dangerous. Even if youbuckle up, your safety belts can’t do their jobwhen you’re reclined like this.The shoulder belt can’t do its job. In a crash,you could go into it, receiving neck or otherinjuries.The lap belt can’t do its job either. In a crashthe belt could go up over your abdomen. Thebelt forces would be there, not at your pelvicbones. This could cause serious internalinjuries.For proper protection when the vehicle is inmotion, have the seatback upright. Then sitwell back in the seat and wear your safety beltproperly.Adjust your head restraint so that the top of the restraintis closest to the top of your head. This positionreduces the chance of a neck injury in a crash.The head restraints lock into place when raised. Torelease the head restraint and lower it, press thetab located on the top of the seatback.1-5

Rear SeatsRear Seat OperationThe rear seatback leversare located on theoutboard side of the rearseatbacks.Your vehicle may have a folding rear seat which letsyou fold the seatbacks down for more cargo space.Pull the seatback toward you as you lift up on the lever.The head restraint will automatically fold out of theway when the seatback is folded down.To raise the seatbacks, lift up the seatbacks and pushon them until they lock into the upright position.Push and pull on the seatbacks to make sure that theyare latched securely. Then fold the bottom seatcushion back into place.Pull up on the loop located where the seat cushionmeets the seatback to fold the seat cushion up and outof the way. This will allow the seatback to fold flatand increase the cargo area.1-6

To fold and tumble the second row seat(s), do thefollowing:1. Push the head restraints fully down.2. Fold the seatback flat on the seat by pulling up onthe front part of the fold and tumble lever. The leveris located on the outboard side of the seat(indicated as 1 on the handle side cover).To return the head restraint to the upright position,reach behind the seat and pull the restraint up until itlocks into place. Push and pull on the head restraint tomake sure that it is latched securely.Rear Seats (TrailBlazer EXT)The second row seat is a 65/35 split seat which may befolded and tumbled. Use this feature for gainingaccess to the third row seats.3. Release the rear set of seat hooks from the floorpins by pulling up on the rear part of the lever(indicated as 2 on the handle side cover). Thisenables the seat to be tumbled forward.1-7

Returning the Seats to an Upright PositionTo return the seat(s) to the upright position, do thefollowing:1. Pull the bottom of the seat release lever towardsthe front of the vehicle to release the seat. Thelever is located at the bottom of the seat cushion onthe outboard side of each second row seat.2. Return the seat to the floor pins by rotating the seatdown to reengage the seat hooks.3. Try to raise the seat to check that it is locked down.4. Pull the seat back up to return it to the uprightposition.Entry/Exit to/from the Third Row SeatTo enter the third row seat, you must fold and tumblethe second row seat following the instructions givenpreviously.If you are exiting the third row with no assistance, dothe following.1. Pull the handle on the center of the second rowseatback down to release and fold the seatback.2. Reach around to the side of the second row seatand pull the back of the seat lever up to tumblethe entire seat.Be sure to return the seat to the upright position whenyou are finished. Never use the third row as a seatingposition while the second row is folded and tumbled.1-8Folding the Third Row Seats1. Pull up on the handle located on the bottom of theseat cushion to release the seat cushion.2. Lift up the seat, and then pull it forward.3. Fold the seatback forward until it is flat.4. Unhook the elastic loop on the back of the seatback.5. Fold the panel located on the back of the seatbackto make a flat surface.Returning the Seat(s) to an UprightPositionTo return the seat to its original position, reverse thesteps listed previously in folding the third row seats.Safety BeltsSafety Belts: They Are for EveryoneThis part of the manual tells you how to use safetybelts properly. It also tells you some things you shouldnot do with safety belts.

{CAUTION:Don’t let anyone ride where he or she can’twear a safety belt properly. If you are in acrash and you’re not wearing a safety belt,your injuries can be much worse. You can hitthings inside the vehicle or be ejected from it.You can be seriously injured or killed. In thesame crash, you might not be, if you arebuckled up. Always fasten your safety belt,and check that your passengers’ belts arefastened properly too.{CAUTION:It is extremely dangerous to ride in a cargoarea, inside or outside of a vehicle. In acollision, people riding in these areas are morelikely to be seriously injured or killed. Donotallow people to ride in any area of yourvehicle that is not equipped with seats andsafety belts. Be sure everyone in your vehicleis in a seat and using a safety belt properly.Your vehicle has a lightthat comes on as areminder to buckle up. SeeSafety Belt ReminderLight on page 3-35.In most states and in all Canadian provinces, the lawsays to wear safety belts. Here’s why: They work.You never know if you’ll be in a crash. If you do have acrash, you don’t know if it will be a bad one.A few crashes are mild, and some crashes can be soserious that even buckled up, a person wouldn’t survive.But most crashes are in between. In many of them,people who buckle up can survive and sometimes walkaway. Without belts they could have been badly hurtor killed.After more than 30 years of safety belts in vehicles, thefacts are clear. In most crashes buckling up doesmatter. a lot!1-9

Why Safety Belts WorkWhen you ride in or on anything, you go as fast asit goes.Put someone on it.Take the simplest vehicle. Suppose it’s just a seaton wheels.1-10

Get it up to speed. Then stop the vehicle. The riderdoesn’t stop.The person keeps going until stopped by something. Ina real vehicle, it could be the windshield.1-11

or the instrument panel.or the safety belts!With safety belts, you slow down as the vehicle does.You get more time to stop. You stop over more distance,and your strongest bones take the forces. That’s whysafety belts make such good sense.1-12

Questions and Answers AboutSafety BeltsQ: Won’t I be trapped in the vehicle after anaccident if I’m wearing a safety belt?A:You could be – whether you’re wearing a safetybelt or not. But you can unbuckle a safety belt,even if you’re upside down. And your chanceof being conscious during and after an accident,so you can unbuckle and get out, is much greater ifyou are belted.Q: If I’m a good driver, and I never drive far fromhome, why should I wear safety belts?A:You may be an excellent driver, but if you’re in anaccident – even one that isn’t your fault – you andyour passengers can be hurt. Being a gooddriver doesn’t protect you from things beyond yourcontrol, such as bad drivers.Most accidents occur within 25 miles (40 km) ofhome. And the greatest number of serious injuriesand deaths occur at speeds of less than40 mph (65 km/h).Safety belts are for everyone.Q: If my vehicle has air bags, why should I have towear safety belts?A:Air bags are in many vehicles today and will be inmost of them in the future. But they aresupplemental systems only; so they work withsafety belts – not instead of them. Every air bagsystem ever offered for sale has required theuse of safety belts. Even if you’re in a vehicle thathas air bags, you still have to buckle up to getthe most protection. That’s true not only in frontalcollisions, but especially in side and othercollisions.1-13

How to Wear Safety Belts ProperlyThis part is only for people of adult size.Be aware that there are special things to know aboutsafety belts and children. And there are differentrules for smaller children and babies. If a child will beriding in your vehicle, see Older Children on page 1-28or Infants and Young Children on page 1-31. Followthose rules for everyone’s protection.First, you’ll want to know which restraint systems yourvehicle has.We’ll start with the driver position.Driver PositionThis part describes the driver’s restraint system.Lap-Shoulder BeltThe driver has a lap-shoulder belt. Here’s how to wear itproperly.1. Close and lock the door.2. Adjust the seat so you can sit up straight. To seehow, see “Seats” in the Index.1-143. Pick up the latch plate and pull the belt across you.Don’t let it get twisted.4. Push the latch plate into the buckle until it clicks.Pull up on the latch plate to make sure it is secure.If the belt isn’t long enough, see Safety BeltExtender on page 1-28.Make sure the release button on the buckle ispositioned so you would be able to unbuckle thesafety belt quickly if you ever had to.

5. To make the lap part tight, pull up on theshoulder belt.The lap part of the belt should be worn low and snug onthe hips, just touching the thighs. In a crash, thisapplies force to the strong pelvic bones. And you’d beless likely to slide under the lap belt. If you slid under it,the belt would apply force at your abdomen. Thiscould cause serious or even fatal injuries. The shoulderbelt should go over the shoulder and across thechest. These parts of the body are best able to take beltrestraining forces.The safety belt locks if there’s a sudden stop or crash,or if you pull the belt very quickly out of the retractor.1-15

Q: What’s wrong with this?{CAUTION:You can be seriously hurt if your shoulder beltis too loose. In a crash, you would moveforward too much, which could increase injury.The shoulder belt should fit against your body.A:1-16The shoulder belt is too loose. It won’t give nearlyas much protection this way.

Q: What’s wrong with this?{CAUTION:You can be seriously injured if your belt isbuckled in the wrong place like this. In a crash,the belt would go up over your abdomen. Thebelt forces would be there, not at the pelvicbones. This could cause serious internalinjuries. Always buckle your belt into thebuckle nearest you.A:The belt is buckled in the wrong place.1-17

Q: What’s wrong with this?{CAUTION:You can be seriously injured if you wear theshoulder belt under your arm. In a crash, yourbody would move too far forward, which wouldincrease the chance of head and neck injury.Also, the belt would apply too much force tothe ribs, which aren’t as strong as shoulderbones. You could also severely injure internalorgans like your liver or spleen.A:1-18The shoulder belt is worn under the arm. It shouldbe worn over the shoulder at all times.

Q: What’s wrong with this?{CAUTION:You can be seriously injured by a twisted belt.In a crash, you wouldn’t have the full width ofthe belt to spread impact forces. If a belt istwisted, make it straight so it can workproperly, or ask your dealer to fix it.A:The belt is twisted across the body.1-19

Safety Belt Use During PregnancySafety belts work for everyone, including pregnantwomen. Like all occupants, they are more likely to beseriously injured if they don’t wear safety belts.To unlatch the belt, just push the button on the buckle.The belt should go back out of the way.Before you close the door, be sure the belt is out of theway. If you slam the door on it, you can damageboth the belt and your vehicle.A pregnant woman should wear a lap-shoulder belt, andthe lap portion should be worn as low as possible,below the rounding, throughout the pregnancy.1-20

The best way to protect the fetus is to protect themother. When a safety belt is worn properly, it’s morelikely that the fetus won’t be hurt in a crash. Forpregnant women, as for anyone, the key to makingsafety belts effective is wearing them properly.Rear Seat Passenger PositionsRight Front Passenger PositionTo learn how to wear the right front passenger’s safetybelt properly, see Driver Position on page 1-14.The right front passenger’s safety belt works the sameway as the driver’s safety belt – except for one thing.If you ever pull the shoulder portion of the belt out all theway, you will engage the child restraint locking feature.If this happens, just let the belt go back all the wayand start again.Rear Seat PassengersIt is very important for rear seat passengers to buckleup! Accident statistics show that unbelted people inthe rear seat are hurt more often in crashes than thosewho are wearing safety belts.Rear passengers who are not safety belted can bethrown out of the vehicle in a crash. And they can strikeothers in the vehicle who are wearing safety belts.1-21

Lap-Shoulder BeltAll rear seating positions have lap-shoulder belts. Hereis how to wear one properly.When the shoulder belt is pulled out all the way, itwill lock. If it does, let it go back all the wayand start again. If the belt is not long enough, seeSafety Belt Extender on page 1-28.Make sure the release button on the buckle ispositioned so you would be able to unbuckle thesafety belt quickly if you ever had to.1. Pick up the latch plate and pull the belt across you.Do not let it get twisted.2. Push the latch plate into the buckle until it clicks.Pull up on the latch plate to make sure it is secure.1-223. To make the lap part tight, pull up on theshoulder part.

{CAUTION:You can be seriously hurt if your shoulder beltis too loose. In a crash, you would moveforward too much, which could increase injury.The shoulder belt should fit against your body.The lap part of the belt should be worn low and snug onthe hips, just touching the thighs. In a crash thisapplies force to the strong pelvic bones. And you wouldbe less likely to slide under the lap belt. If you slidunder it, the belt would apply force at your abdomen.This could cause serious or even fatal injuries. Theshoulder belt should go over the shoulder and acrossthe chest. These parts of the body are best able to takebelt restraining forces.1-23

Rear Safety Belt Comfort Guides forChildren and Small AdultsRear shoulder belt comfort guides provide added safetybelt comfort for older children who have outgrownbooster seats and for small adults. When attached to ashoulder belt, the comfort guide better positions thebelt away from the neck and head.There is one guide for each of the rear outsidepassenger positions. Here is how to attach the comfortguide to the shoulder belt.To unlatch the belt, just push the button on the buckle.1-24

Style 11. Slide the guide off of its storage clip locatedbetween the interior body and the seatback.3. Be sure that the belt is not twisted and it lies flat.The elastic cord must be under the belt and theguide on top.2. Slide the guide under and past the belt. The elasticcord must be under the belt. Then, place the guideover the belt and insert the two edges of thebelt into the slots of the guide.1-25

Style 21. An elastic cord with a hook end is located in apocket on the side of the seatback. Remove theguide from its pocket.4. Buckle, position and release the safety belt asdescribed in Rear Seat Passengers on page 1-21.Make sure that the shoulder belt crosses theshoulder.To remove and store the comfort guides, squeeze thebelt edges together so that you can take them out of theguides. Slide the guide back on its storage clip locatedbetween the interior body and the seatback.1-262. Align the sliding comfort guide, located on theshoulder belt, with the hook. Attach the hook tothe loop on the sliding comfort guide.

3. Adjust the cord length so that the belt is betweenthe shoulder and neck.3.1. Squeeze and hold the ends of the lock (A)on the elastic cord.3.2. Pull the loop to shorten the guide or pull thecord to lengthen the guide.3.3. Release the lock.4. Be sure that the belt is not twisted and it lies flat.The elastic cord must be under the belt and theguide on top.5. Buckle, position and release the safety belt asdescribed in Rear Seat Passengers on page 1-21.Make sure that the shoulder belt crosses theshoulder.To remove and store the comfort guides, remove thehook from the loop. Slide the guide back into its storagepocket located on the side of the seatback.1-27

Safety Belt ExtenderChild RestraintsIf the vehicle’s safety belt will fasten around you, youshould use it.Older ChildrenBut if a safety belt isn’t long enough to fasten, yourdealer will order you an extender. It’s free. When you goin to order it, take the heaviest coat you will wear, sothe extender will be long enough for you. The extenderwill be just for you, and just for the seat in yourvehicle that you choose. Don’t let someone else use it,and use it only for the seat it is made to fit. To wearit, just attach it to the regular safety belt.Older children who have outgrown booster seats shouldwear the vehicle’s safety belts.1-28

Q: What is the proper way to wear safety belts?A: If possible, an older child should wear alap-shoulder belt and get the additional restraint ashoulder belt can provide. The shoulder beltshould not cross the face or neck. The lap beltshould fit snugly below the hips, just touching thetop of the thighs. It should never be worn overthe abdomen, which could cause severe or evenfatal internal injuries in a crash.Accident statistics show that children are safer if theyare restrained in the rear seat.In a crash, children who are not buckled up can strikeother people who are buckled up, or can be thrownout of the vehicle. Older children need to use safetybelts properly.{CAUTION:Never do this.Here two children ar

Front Seats Manual Seats {CAUTION:You can lose control of the vehicle if you try to adjust a manual driver's seat while the vehicle is moving. The sudden movement could startle