2021 CHEVROLET EXPRESS CARGO engine coolant
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252 Service and Maintenance
help the longevity and efficient operation of
the air conditioning system. This service can
be complex. See your dealer.
Tire Rotation and Required Services
Every 12 000 km (7,500 mi)
Rotate the tires, if recommended for the
vehicle, and perform the following services.
SeeTire Rotation 0221.
.Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system.
See Engine Oil 0184 and
Engine Oil Life System 0186.
.Check engine coolant level. See Cooling
System 0191.
.Check windshield washer fluid level. See
Washer Fluid 0196.
.Check tire inflation pressures, including
the spare. See Tire Pressure0217.
.Inspect tire wear. See Tire Inspection
0 221.
.Visually check for fluid leaks.
.Inspect engine air cleaner filter. See
Engine Air Cleaner/Filter 0189.
.Inspect brake system. See Exterior Care
0 242.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0242.
.Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.
.Visually inspect halfshafts and drive
shafts for excessive wear, lubricant leaks,
and/or damage including: tube dents or
cracks, constant velocity joint or universal
joint looseness, cracked or missing boots,
loose or missing boot clamps, center
bearing excessive looseness, loose or
missing fasteners, and axle seal leaks.
.Check restraint system components. See
Safety System Check 035.
.Visually inspect fuel system for damage
or leaks.
.Visually inspect exhaust system and
nearby heat shields for loose or damaged
parts.
.Lubricate body components. See Exterior
Care 0242.
.Check starter switch. See Starter Switch
Check 0200.
.Check automatic transmission shift lock
control function. See Automatic
Transmission Shift Lock Control Function
Check 0201.
.Check ignition transmission lock. See
Ignition Transmission Lock Check 0201.
.Check parking brake and automatic
transmission park mechanism. See Park
Brake and P (Park) Mechanism Check
0 201.
.Check accelerator pedal for damage, high
effort, or binding. Replace if needed.
.Lubricate the steering linkage (greasable
joints). See Normal and Severe
Maintenance Schedules. For severe
commercial use vehicles, see Special
Application Services 0255.
.Visually inspect the spare tire to ensure
that it is tightly stowed under the vehicle.
Push, pull, and try to turn the tire. If the
spare tire moves, tighten as necessary.
See Tire Changing 0229.
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Service and Maintenance 257
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
This maintenance section applies to vehicles with a gasoline engine. If the vehicle has a diesel engine, see the maintenance schedule section in
the Duramax diesel supplement.
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.Usage Fluid/Lubricant
Automatic Transmission (6-Speed Transmission) DEXRON-VI Automatic Transmission Fluid.
Automatic Transmission (8-Speed Transmission) DEXRON-HP Automatic Transmission Fluid.
Chassis Lubrication, Parking Brake Cable Guides Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System
0 191.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0184.
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid.
Key Lock Cylinders, Hood Hinges Multi-Purpose Lubricant, Superlube. See your dealer. Power Steering System GM Power Steering Fluid. See your dealer. Rear Axle See your dealer.
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.
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Index 287
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Connections Connected Services . . . . . . . . . . . . . . . . . . . . 283
Control Traction and Electronic Stability . . . . . . . 147
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . . 127
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Coolant Engine Temperature Gauge . . . . . . . . . . . . . 73
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119, 122
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Courtesy Transportation Program . . . . . . . . 270
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Customer Assistance . . . . . . . . . . . . . . . . . . . . . 267
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Text Telephone (TTY) Users . . . . . . . . . . . . 267
Customer Information Publications Ordering Information . . . . . 273
Customer Satisfaction Procedure . . . . . . . . . 265
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275D
Damage Repair, Collision . . . . . . . . . . . . . . . . . . 271
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Data Collection Infotainment System . . . . . . . . . . . . . . . . . . 276
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 275
Daytime Running Lamps (DRL) . . . . . . . . . . . . .91
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . 126
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Devices Auxiliary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 284
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . 126
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Door Cargo Door Relocking . . . . . . . . . . . . . . . . . . . . 11
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 12
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rear Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sliding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 264
Driver Assistance Systems . . . . . . . . . . . . . . . 150
Driver Information Center (DIC) . . . . . . . . . . . .81 Driving
Better Fuel Economy . . . . . . . . . . . . . . . . . . . 126
Characteristics and Towing Tips . . . . . . . . 160
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Hill and Mountain Roads . . . . . . . . . . . . . . 130
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . . 131
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 128
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 128
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 132
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
E
Electrical Equipment, Add-On . . . . . . . . . . . . 176
Electrical SystemEngine Compartment Fuse Block . . . . . . . 206
Floor Console Fuse Block . . . . . . . . . . . . . . . 210
Fuses and Circuit Breakers . . . . . . . . . . . . . 205
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 189
Check Light (Malfunction Indicator) . . . . . 76
Compartment Overview . . . . . . . . . . . . . . . . . 181
Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . 139
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288 Index
Engine (cont'd)Coolant Temperature Gauge . . . . . . . . . . . . 73
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . 191
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 264
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 186
Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . . 72
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . 80
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Power Messages . . . . . . . . . . . . . . . . . . . . . . . . 85
Running While Parked . . . . . . . . . . . . . . . . . 142
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Enhanced Technology Glass . . . . . . . . . . . . . . . . 21
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . . 172
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 275
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . .35
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . . 90
Exterior Lamps Off Reminder . . . . . . . . . . . . . 90
Exterior Lighting Battery Saver . . . . . . . . . . . 95
F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Fast Idle System . . . . . . . . . . . . . . . . . . . . . . . . . .138 Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 189
Fixed Mast Antenna . . . . . . . . . . . . . . . . . . . . . 103
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . 92
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Fluid Automatic Transmission . . . . . . . . . . 186, 189
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Power Steering . . . . . . . . . . . . . . . . . . . . . . . . 196
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Forward Collision Alert (FCA) System . . . . .154
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Front Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Front Turn Signal Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 202
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Economy, Driving for Better . . . . . . . . . . . 126
Filling a Portable Fuel Container . . . . . . . 160 Fuel (cont'd)
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 158
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 158
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Low Fuel Warning Light . . . . . . . . . . . . . . . . 80
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 158
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 158
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 236
Fuses Engine Compartment Fuse Block . . . . . . . 206
Floor Console Fuse Block . . . . . . . . . . . . . . . 210
Fuses and Circuit Breakers . . . . . . . . . . . . . 205
G
GaugesEngine Coolant Temperature . . . . . . . . . . . . 73
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 72
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Warning Lights and Indicators . . . . . . . . . . 70
General Information Service and Maintenance . . . . . . . . . . . . . . 250
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
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Index 289
General Information (cont'd)Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Glass, Enhanced Technology . . . . . . . . . . . . . . . 21
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Hazard Warning Flashers . . . . . . . . . . . . . . . . . 92
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 202
Daytime Running Lamps (DRL) . . . . . . . . . . 91
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
High-Beam On Light . . . . . . . . . . . . . . . . . . . . 81
High/Low Beam Changer . . . . . . . . . . . . . . . 91
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Heater Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . 139
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . 119, 121, 122
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . . .81
Hill and Mountain Roads . . . . . . . . . . . . . . . . 130
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . .147
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 How to Wear Seat Belts Properly . . . . . . . . . 29
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119, 121, 122
I
Idle System
Fast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . . 135
Ignition Transmission Lock Check . . . . . . . . 201
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Indicator
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Infants and Young Children, Restraints . . . . 47
Information
Publication Ordering . . . . . . . . . . . . . . . . . . . 273
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Infotainment System . . . . . . . . . . . . . . . . . . . . 276
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . . . 71
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . .19
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
J
Jump Starting - North America . . . . . . . . . . . 237
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . . 213
Lamps
Daytime Running (DRL) . . . . . . . . . . . . . . . . . 91
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . . 90
Exterior Lamps Off Reminder . . . . . . . . . . . 90
Exterior Lighting Battery Saver . . . . . . . . . 95
License Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Lamps, Bulb Replacement . . . . . . . . . . . . . . . . 202
Lane Departure Warning (LDW) . . . . . . . . . . . 157
Lane Departure Warning Light . . . . . . . . . . . . 79
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . . 31
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 58
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Lighter, Cigarette . . . . . . . . . . . . . . . . . . . . . . . . . 70
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Illumination Control . . . . . . . . . . . . . . . . . . . . 93
Lights Airbag On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . 75