The 2010 GMC Sierra 1500 came with the 5.3L Vortec V8 engine (RPO code LMG), producing 315 horsepower and 335 lb-ft of torque. This aluminum block engine features Active Fuel Management (AFM) cylinder deactivation technology that shuts down four cylinders under light load conditions to improve fuel economy. The engine uses a drive-by-wire throttle system and variable valve timing on the intake camshaft. It’s paired with either a 4L60E 4-speed or 6L80E 6-speed automatic transmission depending on the trim level and configuration.

The 2010 GMC Sierra 1500 shares most parts with the 2007-2013 GMT900 platform generation. Engine components from 2007-2013 5.3L engines are largely interchangeable, though some sensors and wiring may vary by year. Body panels, doors, and glass interchange with 2007-2013 models, but 2010-2013 models had slight interior updates. Suspension components, brakes, and drivetrain parts are compatible across the entire 2007-2013 range. The Chevrolet Silverado 1500 of the same years shares virtually all mechanical components with the Sierra.

Parts availability changes daily. Call us at (603) 392-7313 or visit our online shop to check current inventory from this specific vehicle. If we have sold a part you need, our Parts Broker service can source it from our network of partner yards nationwide.

Yes! We ship parts from this vehicle and our entire inventory nationwide. Most orders ship within 1-2 business days via FedEx or freight carriers for larger components like engines and transmissions. Call (603) 392-7313 for a shipping quote on any part.

The 5.3L Vortec is generally reliable but has notable weaknesses. The AFM system is the biggest concern, with lifter failures being common after 80,000 miles. Many owners disable AFM to prevent this issue. The aluminum block is durable, but intake manifold gaskets can fail around 100,000 miles. Regular oil changes with quality oil are critical for longevity. When properly maintained and with AFM disabled, these engines can exceed 200,000 miles. The bottom end is robust, but the AFM lifters and timing chain components require attention.