2018 Buick Enclave
Vehicle Specs & Maintenance Data
The 2018 Buick Enclave maintenance specs on this page cover the key fluids, torque values, and wear items you need for routine service. Use these numbers as a quick reference when performing oil changes, tire rotations, brake jobs, and other scheduled maintenance on your Buick Enclave.
For oil changes, the 2018 Buick Enclave takes 5W-30 Full Synthetic motor oil with a capacity of 6 quarts. Brake fluid type is DOT 4, the recommended coolant is Dex-Cool (OAT), and transmission fluid is Dexron VI. Always use the manufacturer-recommended fluids to maintain warranty coverage and engine longevity.
When mounting wheels on the Buick Enclave, torque the lug nuts to 140 ft-lbs using a calibrated torque wrench. Over- or under-torquing can lead to warped brake rotors or loose wheels. Re-torque after 50 to 100 miles on newly installed wheels.
Owners of the 2018 Buick Enclave have reported 5 common issues including "Roof Rail Air Bag Connector Incompatibility", "9-Speed Transmission Shudder and Jerking" and "Exhaust Pipe Hole and Potential CO Leak". Scroll down to the Diagnostics tab for detailed descriptions, solutions, and estimated repair costs.
Specifications on this page are compiled from multiple publicly available sources including manufacturer documentation, NHTSA data, and automotive databases. Always cross-reference with your owner's manual or official factory documentation before purchasing parts or performing any service.
The 2018 Buick Enclave uses 5W-30 Full Synthetic motor oil (6 qt capacity), requires lug nuts torqued to 140 ft-lbs, takes DOT 4 brake fluid.
Manufacturer-recommended maintenance schedule for the 2018 Buick Enclave. Always verify intervals against your owner's manual.
Enter a diagnostic trouble code to see causes, symptoms, and fixes for the 2018 Buick Enclave.
Common problems reported by 2018 Buick Enclave owners, with recommended fixes and estimated repair costs.
Roof Rail Air Bag Connector Incompatibility
The harness connector to the left or right side roof rail air bag may have incompatible electrical terminals, identical to the issue affecting the Chevrolet Traverse on the shared C1XX platform. This manufacturing defect can prevent the side curtain airbags from deploying in a side impact or rollover crash.
NHTSA recall for 2021-2022 Buick Enclave. Dealers replace the harness connector to the roof rail air bags with a compatible connector, free of charge.
Est. Cost: $0 (recall repair)9-Speed Transmission Shudder and Jerking
The 9-speed automatic transmission exhibits shuddering at light throttle between 25-50 mph, jerking at low speeds, and occasional harsh shifts. The vehicle may feel like it is hesitating or surging during normal city driving. Some owners report the transmission slipping or failing to engage reverse promptly.
Transmission fluid flush with updated GM-approved fluid. TCM recalibration and software update. Torque converter replacement for persistent shudder. In cases of internal failure, complete transmission replacement under powertrain warranty.
Est. Cost: $300 (fluid service) - $5,000 (transmission replacement)Exhaust Pipe Hole and Potential CO Leak
A known defect can cause a large hole to form in the exhaust pipe between the exhaust manifold and the muffler. This hole allows exhaust gases, including carbon monoxide, to potentially leak into the passenger compartment through the HVAC fresh air intake. The condition also causes decreased engine performance and a noticeably louder exhaust tone.
Replace the affected exhaust pipe section. Inspect the exhaust system for additional corrosion or damage. In some cases, the exhaust manifold gasket may also need replacement. Ensure all heat shields are intact and properly positioned.
Est. Cost: $400 - $1,200Premature Brake Wear and Grinding Noise
Owners report brake pads and rotors wearing prematurely, sometimes before 20,000 miles. The brakes produce grinding and squealing noises, and pedal pulsation occurs when the rotors warp from heat. The issue is most pronounced on the front axle and may be related to caliper slide pin binding.
Replace brake pads and rotors. Clean and lubricate caliper slide pins. Inspect caliper pistons for proper retraction. For repeat occurrences, consider upgrading to premium ceramic pads and heavier rotors designed for the Enclave's weight.
Est. Cost: $400 - $1,000 per axlePower Steering System Problems
Some owners experience intermittent loss of power steering assist, heavy steering effort, or a clunking noise when turning the steering wheel. The electric power steering system can fail momentarily, especially during low-speed parking maneuvers. A warning message may or may not appear on the driver information center.
Inspect the electric power steering motor and wiring connections. Update the steering control module software. Replace the steering gear or column assembly if the electric motor has failed. Check the steering intermediate shaft for wear that causes the clunking noise.
Est. Cost: $300 - $2,000