Engine Coolant
50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System 0 301.
Applies to: Engine Coolant
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 392
Owner’s manual specs
2020 Chevrolet Tahoe Specs: Oil Capacity, Fluids, Maintenance Schedule & Fuse Box
Figures for the 2020 Chevrolet Tahoe, copied from Chevrolet’s own owner’s manual. Every one links to the manual page it came from.
From the manufacturer’s manuals. Every figure here is copied from the manufacturer's own manual, with a link to the page it came from. Where a manual is unclear or contradicts itself, we leave the figure out.
Engines in this manual: 5.3L, 6.2L. Figures that differ by engine say which engine they are for.
Fluids & capacities
All engines
Engine Oil
Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil 0 293.
Applies to: Engine Oil
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 392
Engine Oil with Filter
8 qt
7.6 L
Applies to: with filter
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 397
5.3L
Engine Cooling System*
17.8 qt
16.8 L
Applies to: L83 5.3L Engine
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 397
6.2L
Engine Cooling System*
17.8 qt
16.8 L
Applies to: L86 6.2L Engine
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 397
Maintenance schedule
Normal service schedule
Use this for ordinary driving.
| Service | When |
|---|---|
| Replace engine air cleaner filter. (3) Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 385 | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (1) Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 385 | Every 22,500 mi(36,000 km) |
| Rotate tires and perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 385 | Every 7,500 mi(12,000 km) |
Severe service schedule
Use this if you tow, idle a lot, drive short trips in the cold, or run in dust.
| Service | When |
|---|---|
| Change automatic transmission fluid and filter. Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 387 | Every 45,000 mi(72,000 km) |
| Replace engine air cleaner filter. (3) Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 387 | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (1) Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 387 | Every 22,500 mi(36,000 km) |
| Rotate tires and perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 387 | Every 7,500 mi(12,000 km) |
Oil life & reset procedures
Engine oil life system reset
Before you start
- Reset the system whenever the engine oil is changed so that the system can calculate the next engine oil change.
Steps
- Display the OIL LIFE REMAINING on the DIC. If the vehicle does not have DIC buttons, the vehicle must be in P (Park) to access this display. See Driver Information Center (DIC) (Base Level) 0 145 or Driver Information Center (DIC) (Uplevel) 0 147.
- Press and hold V, or the trip odometer reset stem if the vehicle does not have DIC buttons, for several seconds. The oil life will change to 100%.
- Display the OIL LIFE REMAINING on the DIC. If the display shows 100%, the system is reset.
- Allow the engine to idle (500- 800 rpm) for at least one minute. Slowly release the brake pedal.
- Keep the engine running and check the transmission fluid temperature on the Driver Information Center (DIC). See Driver Information Center (DIC) (Base Level) 0 145 or Driver Information Center (DIC) (Uplevel) 0 147.
- Using the transmission fluid temperature reading, determine and perform the appropriate check procedure. If the transmission fluid temperature reading is not within the required temperature ranges, allow the vehicle to cool, or operate the vehicle until the appropriate transmission fluid temperature is reached.
You’ll know it worked: The oil life will change to 100%.
Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty.
Too much or too little fluid can damage the transmission.
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 296
Fuse box locations & fuse chart
Engine Compartment Fuse Block
Where to find it
Engine Compartment Fuse Block The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle.
Lift the cover to access the fuse block.
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 320
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 1 | — | Power Assist Steps | p.322 |
| 2 | — | Antilock brake system pump | p.322 |
| 3 | — | Interior BEC LT1 | p.322 |
| 4 | — | Passenger motorized seat belt | p.322 |
| 5 | — | Suspension leveling compressor | p.322 |
| 6 | — | 4WD transfer case electronic control | p.322 |
| 9 | — | Fuel pump | p.324 |
| 10 | — | Electric parking brake/- | p.322 |
| 13 | — | Interior BEC LT2 | p.322 |
| 14 | — | Rear BEC 1 | p.322 |
| 17 | — | Driver motorized seat belt | p.322 |
| 21 | — | Automatic headlamp leveling/ Exhaust solenoid | p.322 |
| 22 | — | Fuel pump | p.322 |
| 23 | — | Integrated chassis control module | p.322 |
| 24 | — | Real time dampening | p.322 |
| 25 | — | Fuel pump power module | p.322 |
| 26 | — | Active hydraulic assist/Battery regulated voltage control | p.322 |
| 28 | — | Upfitter 2 | p.322 |
| 29 | — | Upfitter 2 | p.324 |
| 31 | — | Trailer interface module | p.322 |
| 34 | — | Reverse lamps | p.322 |
| 35 | — | Antilock brake system valve | p.322 |
| 36 | — | Trailer brakes | p.322 |
| 37 | — | Upfitter 3 | p.324 |
| 39 | — | Right trailer stoplamp/Turn signal lamp | p.322 |
| 40 | — | Left trailer stoplamp/turn signal lamp | p.322 |
| 41 | — | Trailer parking lamps | p.322 |
| 42 | — | Right parking lamps | p.322 |
| 43 | — | Left parking lamps | p.322 |
| 44 | — | Upfitter 3 | p.322 |
| 45 | — | Automatic level control/Run/Crank | p.323 |
| 47 | — | Upfitter 4 | p.323 |
| 48 | — | Upfitter 4 | p.324 |
| 49 | — | Reverse lamps | p.323 |
| 51 | — | Parking lamp | p.324 |
| 59 | — | Euro trailer | p.323 |
| 60 | — | Air conditioning control | p.323 |
| 63 | — | Upfitter 1 | p.323 |
| 64 | — | Secondary fuel pump | p.324 |
| 67 | — | Trailer battery | p.323 |
| 68 | — | Secondary fuel pump | p.323 |
| 69 | — | RC upfitter 3 and 4 | p.323 |
| 70 | — | VBAT upfitter 3 and 4 | p.323 |
| 72 | — | Upfitter 1 | p.324 |
| 74 | — | Engine control module/Ignition | p.323 |
| 75 | — | Miscellaneous/ Ignition/- | p.323 |
| 76 | — | Transmission/ Ignition | p.323 |
| 77 | — | RC upfitter 1 and 2 | p.323 |
| 78 | — | VBAT upfitter 1 and 2 | p.323 |
| 83 | — | Euro trailer/RC | p.323 |
| 84 | — | Run/Crank | p.324 |
| 87 | — | MAF/IAT/Humidity/ TIAP sensor | p.323 |
| 88 | — | Injector A - odd | p.323 |
| 89 | — | Injector B - even | p.323 |
| 90 | — | O2 sensor B | p.323 |
| 91 | — | Throttle control | p.323 |
| 92 | — | Engine control module | p.324 |
| 93 | — | Horn | p.323 |
| 94 | — | Fog lamps | p.323 |
| 95 | — | High-beam headlamps | p.323 |
| 100 | — | O2 sensor A | p.323 |
| 102 | — | Engine control module/ Transmission control module | p.324 |
| 103 | — | Auxiliary interior heater | p.324 |
| 104 | — | Starter | p.324 |
| 107 | — | Aeroshutter | p.324 |
| 109 | — | Police upfitter | p.324 |
| 112 | — | Starter | p.324 |
| 114 | — | Front windshield washer | p.324 |
| 115 | — | Rear window washer | p.324 |
| 116 | — | Left cooling fan | p.324 |
| 121 | — | Right HID headlamp | p.324 |
| 122 | — | Left HID headlamp | p.324 |
| 123 | — | Right cooling fan | p.324 |
Instrument Panel Fuse Block (Left)
Where to find it
Instrument Panel Fuse Block (Left) The left instrument panel fuse block access door is on the driver side edge of the instrument panel.
Pull off the cover to access the fuse block.
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 324
Diagrams in the manual
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 4 | — | Accessory power outlet 1 | p.325 |
| 5 | — | Accessory power outlet from retained accessory power | p.325 |
| 6 | — | Accessory power outlet from battery power | p.325 |
| 7 | — | Universal garage door opener/SEO Roof beacon switch | p.325 |
| 8 | — | SEO/Retained accessory power | p.325 |
| 10 | — | Body control module 3 | p.325 |
| 11 | — | Body control module 5 | p.325 |
| 12 | — | Steering wheel control backlighting | p.325 |
| 16 | — | Discrete logic ignition sensor | p.326 |
| 17 | — | Video processing module/Virtual key module | p.326 |
| 18 | — | Mirror window module | p.326 |
| 19 | — | Body control module 1 | p.326 |
| 20 | — | Front bolster | p.326 |
| 24 | — | HVAC ignition/AUX HVAC ignition | p.326 |
| 25 | — | Instrument cluster/ Ignition sensing diagnostic module ignition | p.326 |
| 26 | — | Tilt column/Tilt column lock 1/SEO 1/SEO 2 | p.326 |
| 27 | — | Data link connector/ Driver seat module | p.326 |
| 28 | — | Passive entry, Passive start/HVAC battery/CGM | p.326 |
| 29 | — | Content theft deterrent | p.326 |
| 33 | — | SEO automatic level control/Left heated seat | p.326 |
| 34 | — | Park enable/Electric adjustable pedal | p.326 |
| 36 | — | Miscellaneous/Run crank | p.326 |
| 37 | — | Heated steering wheel | p.326 |
| 38 | — | Steering column lock 2 | p.326 |
| 42 | — | Euro trailer | p.326 |
| 43 | — | Left doors | p.326 |
| 44 | — | Driver power seat | p.326 |
| 46 | — | Right heated, cooled, or ventilated seat | p.326 |
| 47 | — | Left heated, cooled, or ventilated seat | p.326 |
| 50 | — | Accessory power outlet 2 | p.326 |
| 52 | — | Retained accessory power | p.326 |
Instrument Panel Fuse Block (Right)
Where to find it
Instrument Panel Fuse Block (Right) The right instrument panel fuse block access door is on the passenger side edge of the instrument panel.
Pull off the cover to access the fuse block.
Source: 2020 Chevrolet Tahoe / Suburban Owner Manual, page 327
More fuse pages in the manual
Diagrams and printed legends we can’t host. Check the box name printed on a diagram before counting positions.