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- High adjustable backrest with integrated headrest
- Left hand side control functions
- Adjustable double locking slide rails
- Adjustable air lumbar - upper/lower & bolsters
- 30-degree seat tilt adjustment
- Document map pocket
- Heavy duty 12-volt air suspension
- Left & right adjustable armrests
- Manual air height adjustable
- Adjustable damper
- 12-volt seat heating & cooling
- GMC specific base
- Also available in: Convoy I and Convoy II
- Heavy-duty 12-volt air suspension for premium ride comfort and vibration reduction
- Durable and easy bolt-in upgrade
- Maximum ergonomic support to reduce driver fatigue
- Adjustable seat cushion length: 60mm (2.36”)
- Suspension stroke: 90mm (3.5433”)
- Bolt pattern (side to side): 289mm (11.38”) - 292mm (11.5”)
- Bolt pattern (front to back): 76mm (3.0”) - 381mm (15.0”)
- Seat weight: 55.34kg (122lb)
GMC Medium Duty and TopKick trucks
Convoy III 12-Volt Air Suspension GMC Medium Duty and TopKick Base Seats deliver premium ride comfort, superior vibration reduction, and ergonomic adjustability for professional operators and fleet applications. Featuring heavy-duty 12-volt air suspension with adjustable damper, seat tilt, air dump, and fully adjustable air lumbar system for upper, lower, and side bolsters to help minimize driver fatigue on long hauls and rough roads. Integrated seat and back cushion heaters and coolers add extra comfort. An optional turntable provides swivel with stop functionality. Our GMC Medium Duty and TopKick specific base makes installation easy. Convoy III 12-Volt Air seats provide a premium seating solution with maximum comfort and long-term reliability. No external air supply required.
Upgrade Your Ride. Improve Every Shift.
Our high-performance air-ride seats help absorb road vibration, reduce fatigue, and provide lasting support behind the wheel. Designed for demanding routes and long hours, they’re a practical upgrade for owner-operators and fleets alike.
Contact an Expert
For inquiries, product support, or ordering assistance, we can be reached at:
North America
Toll-Free: 1-800-667-SEAT (7328)
Outside North America
Phone: 1-780-962-0411
Corporate Office
#100, 24925 – 117 Avenue
Acheson, Alberta, T7X 6C2
Our team is available to assist with seat selection, compatibility questions, bulk orders, and technical guidance.
