2018 GMC Sierra C15 Cab Chassis

Special Purpose Vehicle 2WD Regular
GMC Sierra C15 Cab Chassis 2018
17MPG Combined
1 Trim
← 2017 2018
Updated February 27, 2026

The 2018 GMC Sierra C15 Cab Chassis is a Special Purpose Vehicle 2WD that delivers 17 combined MPG. Here’s everything you need to know about this vehicle, from fuel economy to safety ratings.

2018 GMC Sierra C15 Cab Chassis Specifications

SpecValue
Combined MPG17 combined MPG
City MPG15
Highway MPG20
Body StyleSpecial Purpose Vehicle 2WD
Fuel TypeRegular
DriveRWD
Available Trims1

Annual Fuel Cost

Based on EPA estimates, the 2018 GMC Sierra C15 Cab Chassis costs approximately $2,600 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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