U.S. vehicle reference
2018 GMC Sierra 1500 Specs, MPG and Recalls
2018 GMC Sierra 1500 oil capacity, oil type, tire sizes and service specifications by engine, with EPA ratings and NHTSA recall records below.
At a glance
2018 GMC Sierra 1500 reference
Use the summary to orient yourself, then open the exact engine, drivetrain and source record below.
OE tire size
Not published
2018 GMC Sierra 1500 Oil Capacity and Oil Type
Oil specification
Full synthetic engine oil meeting the dexos1 specification
Source
4.3L V6 manufacturer referencesAccessed 2026-09-052018 GMC Sierra 1500 Wheel Torque Specs
Lug nut size
Not published
Fluids
Transmission capacity
Not published
Transmission fluid
DEXRON-VI Automatic Transmission Fluid
Source
4.3L V6 manufacturer referencesAccessed 2026-09-05Coolant type
DEX-COOL coolant in a 50/50 mixture with clean, drinkable water
Source
4.3L V6 manufacturer referencesAccessed 2026-09-05Brake fluid
DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126)
Source
4.3L V6 manufacturer referencesAccessed 2026-09-05Power steering fluid
Not published
Differential fluid
SAE 75W-85 Synthetic Axle Lubricant, rear axle (1500 Series); 4WD front axle uses SAE 75W-90 Synthetic Axle Lubricant
Source
4.3L V6 manufacturer referencesAccessed 2026-09-052018 GMC Sierra 1500 Spark Plugs and Battery
Spark plug gap
Not published
Battery group
Not published
2018 GMC Sierra 1500 Wiper Blade Sizes
Rear
Not published
Service Intervals
Compare service intervals| Item | Months | Miles |
|---|---|---|
| Engine oil | 12 | Not published |
4.3L V6 manufacturer references
2018 GMC Sierra/Sierra Denali Owner Manual Accessed 2026-09-052018 GMC Sierra 1500 oil capacity by engine
These are the compiled configurations. An engine name alone may not identify the tire package or transmission. Read the configuration label and source before choosing parts.
| Configuration | Oil with filter | Oil type | Source | Calculator |
|---|---|---|---|---|
| 4.3L V6 | 6 US qt | SAE 5W-30 | 2018 GMC Sierra/Sierra Denali Owner Manual Accessed 2026-09-05 | Use this capacity |
| 5.3L V8 | 8 US qt | SAE 0W-20 | 2018 GMC Sierra/Sierra Denali Owner Manual Accessed 2026-09-05 | Use this capacity |
| 6.2L V8 | 8 US qt | SAE 0W-20 | 2018 GMC Sierra/Sierra Denali Owner Manual Accessed 2026-09-05 | Use this capacity |
2018 GMC Sierra 1500 MPG by engine and drivetrain
EPA combined ratings run from 17 to 20 mpg across 14 configurations. Match the engine, transmission and drivetrain in the table before comparing fuel costs.
| Engine / transmission | City | Highway | Combined | Annual fuel | CO₂ |
|---|---|---|---|---|---|
| 5.3L 8-cylinderAutomatic 8-spd · Rear-Wheel Drive · Regular Gasoline | 18 mpg | 24 mpg | 20 mpg | $3,100 | 447 g/mi |
| 4.3L 6-cylinderAutomatic 6-spd · Rear-Wheel Drive · Regular Gasoline | 18 mpg | 24 mpg | 20 mpg | $3,100 | 448 g/mi |
| 5.3L 8-cylinderAutomatic 8-spd · 4-Wheel Drive · Regular Gasoline | 16 mpg | 21 mpg | 18 mpg | $3,400 | 490 g/mi |
| 4.3L 6-cylinderAutomatic 6-spd · 4-Wheel Drive · Regular Gasoline | 17 mpg | 22 mpg | 19 mpg | $3,250 | 474 g/mi |
| 5.3L 8-cylinderAutomatic 8-spd · Rear-Wheel Drive · Regular Gasoline | 16 mpg | 22 mpg | 18 mpg | $3,400 | 495 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · Rear-Wheel Drive · Regular Gasoline | 16 mpg | 23 mpg | 19 mpg | $3,250 | 475 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · Rear-Wheel Drive · Regular Gasoline | 16 mpg | 23 mpg | 19 mpg | $3,250 | 475 g/mi |
| 6.2L 8-cylinderAutomatic 8-spd · Rear-Wheel Drive · Premium Gasoline | 15 mpg | 21 mpg | 17 mpg | $4,450 | 517 g/mi |
| 6.2L 8-cylinderAutomatic 8-spd · 4-Wheel Drive · Premium Gasoline | 15 mpg | 20 mpg | 17 mpg | $4,450 | 524 g/mi |
| 5.3L 8-cylinderAutomatic 8-spd · 4-Wheel Drive · Regular Gasoline | 15 mpg | 20 mpg | 17 mpg | $3,600 | 522 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · Rear-Wheel Drive · Regular Gasoline | 15 mpg | 20 mpg | 17 mpg | $3,600 | 523 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · 4-Wheel Drive · Regular Gasoline | 15 mpg | 19 mpg | 17 mpg | $3,600 | 523 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · 4-Wheel Drive · Regular Gasoline | 16 mpg | 22 mpg | 18 mpg | $3,400 | 489 g/mi |
| 5.3L 8-cylinderAutomatic 6-spd · 4-Wheel Drive · Regular Gasoline | 16 mpg | 22 mpg | 18 mpg | $3,400 | 489 g/mi |
Annual fuel figures are the EPA snapshot at the source date. The calculator below uses the separately dated fuel-price record and your inputs, so the estimates may differ.
2018 GMC Sierra 1500 annual fuel cost calculator
Start with the combined MPG for 5.3L 8-cylinder, Automatic 8-spd, Rear-Wheel Drive. Replace it with your measured gas mileage and local pump price for a personal budget.
Formula annual miles ÷ MPG × gasoline price
Fuel cost per mile equals gasoline price divided by MPG. Multiply by your annual mileage for a yearly fuel budget. Add maintenance to estimate cost per mile.
2018 GMC Sierra 1500 recall campaigns
NHTSA returned 7 model-level campaign records as of 2026-09-04. A campaign record does not establish whether your vehicle is affected or whether a repair is outstanding. Check your VIN through NHTSA.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM · 19V645000
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
Remedy: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING · 19V761000
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Remedy: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192261050.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM · 20V603000
General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.
Remedy: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began November 11, 2020. Owners may contact GM customer service at 1-866-522-9559, Cadillac customer service at 1-800-458-8006 or Chevrolet customer service at 1-800-630-2438. GM's number for this recall is N202300860.
AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR · 24V756000
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
Remedy: Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed November 8, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020, and GMC Customer Service at 888-988-7267. GM's number for this recall is N242474500.
AIR BAGS · 25V432000
General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
Remedy: Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed July 23, 2025. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252513060.
AIR BAGS · 26V166000
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 Crew Cab vehicles. The left or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
Remedy: Dealers will replace the left and right-side RRAB modules, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262549710. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 19, 2026.
AIR BAGS · 26V325000
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles. The left-side or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
Remedy: Dealers will replace both RRAB modules, free of charge. Owner notification letters were mailed June 24, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262557310. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 21, 2026. This recall expands previous NHTSA recall number 26V166.
2018 GMC Sierra 1500 NHTSA safety ratings
| Vehicle | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2018 GMC Sierra 1500 PU/EC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/EC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 Hybrid PU/CC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/CC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/CC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/RC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/RC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
Confirm the engine, tire package and service procedure
Match your engine and transmission with the configuration selector. Check the door-jamb tire label for your installed wheel package and cold pressure. A capacity is not a substitute for the filling procedure in the owner's manual; transmission change quantities and total system capacities can describe different jobs.
Fields marked Not published have no compiled value here. They do not mean zero capacity, no maintenance requirement or permission to substitute a part. Request a specification correction with the exact year, engine and manufacturer reference.
Frequently asked questions
How much oil does a 2018 GMC Sierra 1500 take?
4.3L V6: 6 US qt with filter; SAE 5W-30. 5.3L V8: 8 US qt with filter; SAE 0W-20. 6.2L V8: 8 US qt with filter; SAE 0W-20.
What tire size and wheel torque does the 2018 GMC Sierra 1500 use?
4.3L V6: tire size not published; 140 ft-lb. 5.3L V8: tire size not published; 140 ft-lb. 6.2L V8: tire size not published; 140 ft-lb.
What is the 2018 GMC Sierra 1500 gas mileage?
EPA combined ratings run from 17 to 20 mpg across 14 configurations. Match the engine, transmission and drivetrain in the table before comparing fuel costs.
Are these real-world MPG figures for the Sierra 1500?
These are EPA ratings, not owner-reported mileage. Use your measured MPG in the calculator to estimate your own fuel budget. The configuration table keeps city, highway and combined ratings separate.
Does the 2018 GMC Sierra 1500 have recalls?
NHTSA returned 7 model-level campaign records as of 2026-09-04. A campaign record does not establish whether your vehicle is affected or whether a repair is outstanding. Check your VIN through NHTSA.
Does annual fuel cost include servicing or insurance?
No. The EPA cost and the calculator cover fuel only. Use the cost-per-mile calculator to add a maintenance allowance. Insurance, depreciation, finance costs and registration are separate ownership expenses.
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Sources and record dates
U.S. EPA FuelEconomy.gov vehicle dataset Accessed 2026-09-05U.S. EIA public gasoline price table Accessed 2026-09-05NHTSA Recalls API Accessed 2026-09-04NHTSA 5-Star Safety Ratings API Accessed 2026-09-052018 GMC Sierra/Sierra Denali Owner Manual Accessed 2026-09-05Last updated