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To r e p l a c e o n e o f t h e s e b u l b s :
1. Open the tailgate.
2. Remove the two rear lampassembly screws.
3. Pull the rear lamp assemblyoutboard away from the boxside until the retainers release.There will be a noise when theretainers release.
4. Pull the rear lamp assemblystraight back to remove it fromthe vehicle.
5. Turn the bulb socketcounterclockwise.
6. Pull the bulb straight out fromthe socket.
7. Replace the bulb, then insertthe bulb socket into the rearlamp assembly and turnclockwise.
8. Verify the retainer ring is in theproper position. If the retainerring is out of position, it will notengage. Reset the retainer bypulling it forward with a tool.
9. Push the rear lamp assemblystraight in until it is seatedagainst the vehicle.
10. Make sure the rear lampassembly is flush with thebox side.
11 . R e i n s t a l l t h e t w o r e a r l a m passembly screws.
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Center High-Mounted
Stoplamp (CHMSL) and
Cargo Lamp
1. Cargo Lamp Bulbs
2. Center High-MountedStoplamp (CHMSL) Bulb
To r e p l a c e o n e o f t h e s e b u l b s :
1. Remove the two screws and liftoff the lamp assembly.
2. Turn the bulb socketcounterclockwise and pull itstraight out.
3. Pull the bulb straight out fromthe socket.
Replacement Bulbs
For replacement bulbs, contact yourdealer.
Electrical System
High Voltage Devices and
Wiring
For an eAssist vehicle, see theSilverado/Sierra eAssistsupplement.
Electrical System
Overload
The vehicle has fuses to protectagainst an electrical systemoverload. Fuses also protect powerdevices in the vehicle.
Replace a bad fuse with a new oneof the identical size and rating.
If there is a problem on the road andafuseneedstobereplaced,thereare some spare fuses and a fusepuller in the Instrument Panel FuseBlock. The same amperage fusecan also be borrowed. Choosesome feature of the vehicle that isnot needed to use and replace it assoon as possible.
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Double Cab
1. Wheel Blocks
2. Wing Nut Retaining Tool Kit
3. Tool Kit
4. Jack
5. Jack Knob
For regular cab models, theequipment you will need is behindthe passenger seat. For double andcrew cab models, the equipment ison the shelf behind the passengerside second row seat.
1. Turn the knob on the jackcounterclockwise to lower thejack head to release the jackfrom its holder.
2. Turn the wing nutcounterclockwise to remove thewheel blocks and the wheelblock retainer.
3. Turn the wing nut used toretain the storage bag andtools counterclockwise toremove it.
Use the jack handle extensions andthe wheel wrench to remove theunderbody-mounted spare tire.
1. Spare Tire (Valve StemPointed Down)
2. Tire/Wheel Retainer
3. Hoist Cable
4. Hoist Assembly
5. Hoist Shaft
6. Jack Handle Extensions
7. Wheel Wrench
8. Spare Tire Lock (IfEquipped)
9. Hoist Shaft Access Hole
10. Hoist End of Extension Tool
1. Open the spare tire lock coveron the bumper and use theignition key to remove thespare tire lock (8). To removethe spare tire lock, insert theignition key, turn, and pullstraight out.
2. Assemble the wheel wrench (7)and the two jack handleextensions (6), as shown.
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3. Insert the hoist end (openend) (10) of the extensionthrough the hole (9) in the rearbumper.
Do not use the chiseled end ofthe wheel wrench.
Be sure the hoist end of theextension (10) connects to thehoist shaft. The ribbed squareend of the extension is used tolower the spare tire.
4. Turn the wheel wrenchcounterclockwise to lower thespare tire to the ground.Continue to turn the wheelwrench until the spare tire canbe pulled out from under thevehicle.
5. Pull the spare tire out fromunder the vehicle.
6. Tilt the tire toward the vehiclewith some slack in the cable toaccess the tire/wheel retainer.
Tilt the retainer and pull itthrough the center of the wheelalong with the cable andspring.
7. Put the spare tire near theflat tire.
Removing the Flat Tire and
Installing the Spare Tire
Use the following pictures andinstructions to remove the flat tireand raise the vehicle.
1. Jack
2. Wheel Blocks
3. Jack Handle
4. Jack Handle Extensions
5. Wheel Wrench
The tools you will be using includethe jack (1), the wheel blocks (2),the jack handle (3), the jack handleextensions (4), and the wheelwrench (5).
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Vehicle Care 425
1. Do a safety check beforeproceeding. SeeIf a Tire GoesFlat0420.
2. If the vehicle has wheel nutcaps, loosen them by turningthe wheel wrenchcounterclockwise.
If the vehicle has a center capwith wheel nut caps, the wheelnut caps are designed to staywith the center cap after theyare loosened. Remove theentire center cap.
If the wheel has a smoothcenter cap, place the chiselend of the wheel wrench in theslot on the wheel, and gentlypry it out.
3. Use the wheel wrench and turnit counterclockwise to loosenthe wheel nuts. Do not removethe wheel nuts yet.
Front Position–1500 Models
4. If the flat tire is on the front ofthe vehicle (1500 models),position the jack under thebracket attached to thevehicle's frame, behind the flattire, as shown.
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{Warning
Getting under a vehicle when it is
lifted on a jack is dangerous.
If the vehicle slips off the jack,
you could be badly injured or
killed. Never get under a vehicle
when it is supported only by
ajack.
{Warning
Raising the vehicle with the jack
improperly positioned can
damage the vehicle and even
make the vehicle fall. To help
avoid personal injury and vehicle
damage, be sure to fit the jack lift
head into the proper location
before raising the vehicle.
6. Turn the wheel wrenchclockwise to raise the vehicle.Raise the vehicle far enoughoff the ground so there isenough room for the spare tireto fit under the wheel well.
7. Remove all the wheel nuts andtake off the flat tire.
{Warning
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
make wheel nuts become loose
after time. The wheel could come
off and cause an accident. When
changing a wheel, remove any
rust or dirt from places where the
wheel attaches to the vehicle. In
an emergency, a cloth or a paper
towel can be used; however, use
ascraperorwirebrushlaterto
remove all rust or dirt.
8. Remove any rust or dirt fromthe wheel bolts, mountingsurfaces, and spare wheel.
9. Install the spare tire.
{Warning
Never use oil or grease on bolts
or nuts because the nuts might
come loose. The vehicle's wheel
could fall off, causing a crash.
10. Put the wheel nuts back onwith the rounded end of thenuts toward the wheel.
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11 . Ti g h t e n e a c h w h e e l n u t b yhand. Then use the wheelwrench to tighten the nuts untilthe wheel is held againstthe hub.
12. Turn the wheel wrenchcounterclockwise to lower thevehicle. Lower the jackcompletely.
{Warning
If wheel studs are damaged, they
can break. If all the studs on a
wheel broke, the wheel could
come off and cause a crash.
If any stud is damaged because
of a loose-running wheel, it could
be that all of the studs are
damaged. To be sure, replace all
studs on the wheel. If the stud
holes in a wheel have become
larger, the wheel could collapse in
operation. Replace any wheel if
its stud holes have become larger
or distorted in any way. Inspect
hubs and hub⇣piloted wheels for
damage. Because of loose
(Continued)
Warning (Continued)
running wheels, piloting pad
damage may occur and require
replacement of the entire hub, for
proper centering of the wheels.
When replacing studs, hubs,
wheel nuts or wheels, be sure to
use GM original equipment parts.
{Warning
Wheel nuts that are improperly or
incorrectly tightened can cause
the wheels to become loose or
come off. The wheel nuts should
be tightened with a torque wrench
to the proper torque specification
after replacing. Follow the torque
specification supplied by the
aftermarket manufacturer when
using accessory locking wheel
nuts. SeeCapacities and
Specifications0468for original
equipment wheel nut torque
specifications.
Caution
Improperly tightened wheel nuts
can lead to brake pulsation and
rotor damage. To avoid expensive
brake repairs, evenly tighten the
wheel nuts in the proper
sequence and to the proper
torque specification. See
Capacities and Specifications
0468for the wheel nut torque
specification.
13. Tighten the nuts firmly in acrisscross sequence, asshown, by turning the wheelwrench clockwise.
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3. Hoist Cable
4. Hoist Assembly
5. Hoist Shaft
6. Jack Handle Extensions
7. Wheel Wrench
8. Spare Tire Lock (IfEquipped)
9. Hoist Shaft Access Hole
10. Hoist End of Extension Tool
1. Put the tire on the ground atthe rear of the vehicle with thevalve stem pointed down, andto the rear.
2. Pull the cable and springthrough the center of thewheel. Tilt the wheel retainerplate down and through thecenter wheel.
Make sure the retainer is fullyseated across the underside ofthe wheel.
3. Attach the wheel wrench (7)and extensions (6) together, asshown.
4. Insert the hoist end (10)through the hole (9) in the rearbumper and onto the hoistshaft.
Do not use the chiseled end ofthe wheel wrench.
5. Raise the tire part way upward.Make sure the retainer isseated in the wheel opening.
6. Raise the tire fully against theunderside of the vehicle byturning the wheel wrenchclockwise until you hear twoclicks or feel it skip twice. Youcannot overtighten the cable.
7. Make sure the tire is storedsecurely. Push, pull, and thentry to turn the tire. If the tiremoves, use the wheel wrenchto tighten the cable.
8. Reinstall the spare tire lock,if the vehicle has one.